-
Yoshio SHIMODA, Mitsuhiro UDAGAWA, Hyunwoo ROH
Article type: Article
Session ID: E-21
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The validation of simulation program EESLISM using the measured data in Kogakuin Twin chamber (KTC) is described. A series of experiment with the test conditions of intermittent cooling was carried out in July, 2003.The room thermal environment and cooling load were simulated using EESLISM. The simulated results show good agreement with the measured date for the temperatures and the sensible heat.
View full abstract
-
Ryuji YANAGIHARA, Kazuaki KISHI, Masazumi NAKAO, Akiyoshi YAMANAKA, Ry ...
Article type: Article
Session ID: E-22
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Synopsis: This paper will report the outline of FACES (Forecasts of Air-conditioning System1s Energy, Environmental, and Economical Performance by Simulation). FACES features as follows: Interactive Graphical User Interface for Easy Operation. Various ways for input and output to study in details. Accurate calculation. Save many hours by Automatic designing and Intelligible report.
View full abstract
-
Hiroshi NINOMIYA, Kazusa KOIKE, Fumio SAKURAI, MiKi SAKAI, Tatsuo INOO ...
Article type: Article
Session ID: E-23
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
This paper describes Structure and Logic of Simulation program "FACES". FACES has some solver-programs (Calculation of cooling and heating load, Auto-selection of Machine, System Simmulation, Calculation of Economical Performance) In FACES, Main-program (GUI program) controls some solver-programs.
View full abstract
-
Takashi TSUDA, Masaki TAJIMA, Takao SAWACHI, Hironao SETO, Satoru MINE ...
Article type: Article
Session ID: F-1
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
When the mechanical ventilation with ducts is used in dwellings, the airflow measurement and the adjustment between pressure losses along different branches are needed to confirm the installation quality and the fulfillment of individual ventilation requirement. In this study, three methods for airflow measurement are quantified of their accuracy, and three different ways of pressure loss adjustment are tested for their easiness and effectiveness. All these adjustment ways are proved to be satisfactory.
View full abstract
-
Norio SHIMIZU, Takao SAWATCHI, Ko HASAGAWA, Masaki TAJIMA
Article type: Article
Session ID: F-2
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
For the purpose of the accurate ventilation design, measuring method of parts necessary for ventilation rate design of duct ventilation system used in the residential buildings was examined. In this research, the result of examining ventilation rate-pressure characteristics of the duct, indoor ventilation opening, air blower is reported. The duct examined 2 kinds of measuring method.
View full abstract
-
Ko HASAGAWA, Takao SAWATCHI, Norio SHIMIZU, Masaki TAJIMA
Article type: Article
Session ID: F-3
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The pressure loss characteristic of the ventilation parts in the residential buildings is measured as static pressure loss. In the case of joint parts such as branch and junction, the static pressure loss measured may become negative. We examined how to calculate total pressure loss from the measurement result of static pressure loss. The calculation result of the total pressure loss using the estimated coefficient is generally equal to the experiment results.
View full abstract
-
Shigeki ONISHI, Masaki TAJIMA, Takashi KATAOKA, Takao SAWACHI, Hironao ...
Article type: Article
Session ID: F-4
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
It is common to use flexible duct for whole house ventilation systems due to easier installation work. However it is difficult to know the real conditions of ducts before installation. In this study air flow rates of a whole house ventilation system are measured at the simulated conditions of installation in a testing laboratory. This study shows about the differences between the deigned air flow rate and measured air flow rate, decrease of air flow rate by pressure drop, effects of balancing air flow rates of terminal devices by regulating opening area.
View full abstract
-
Kazuhiko UMEDA, Kiyoshi HIWATASHI, Yasushige MORIKAWA, Yoshihisa NAGAT ...
Article type: Article
Session ID: F-5
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
If a ceiling plenum in a house can be made into the route of airflow for ventilation without using duct, it is possible to design that it be made still higher the ceiling height of a sitting room, and that it frees a floor plan. As a result of the experiment using model made to the same measure of ceiling plenum in a detached house constructed of box frame type reinforced concrete, this report presents a method calculating the resistance coefficient of the air using total pressure loss be measured, and a relations between speed of air supply and static pressure.
View full abstract
-
Kyosuke HIYAMA, Shinsuke KATO, Takeo TAKAHASHI, Hong HUANG, Shin KOBAY ...
Article type: Article
Session ID: F-6
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Natural ventilation is expected as a simple and effective method to improve the indoor air quality and energy saving. Environmental survey was performed for the building that was designed to improve indoor environment with natural ventilation positively. The ventilation rate, the wind-pressure difference between the outer facade as inflow opening and the courtyard facade as outflow opening were measured and examined with the building design policy. The characteristics of indoor air quality, and the air velocity distribution in the building were also examined
View full abstract
-
Jun SAKAGUCHI, Shin-ichi AKABAYASHI
Article type: Article
Session ID: F-7
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
In this study, cross ventilation efficiency was evaluated by the multi zone network airflow simulation and the CFD. Cross-ventilated detached house is evaluated. Quantitative evaluation of the effect of cross ventilation has carried out. The analytic object is a standard residence model. The purpose of this simulation is to calculate indoor airflow velocity distribution and SET^* distribution. In this paper, the relationships between a large opening (window and inside door) and the cross ventilation performance (velocity and temperature distribution) using CFD was described.
View full abstract
-
Yoshiteru SHINADA, Ken-ichi KIMURA, Hiromasa KATSURAGI, Sung-ki SONG, ...
Article type: Article
Session ID: F-8
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The results of field investigation on the performance of a natural ventilation system combined with solar chimney and cool pit introduced into a university building in Kitakyushu city in the 3^<rd> year are described In the 3^<rd> year after school opening, natural ventilation was observed during the hours of 61 % of cooling period. The total amount of cooling under natural ventilation conditions was 58.9GJ at the measured block of the building with 4,392m^2 of floor area. The outside air load while the outside air intake units were operating was reduced by 30.7% during the cooling period and by 11.3% during the heating period
View full abstract
-
Hiroyasu OKUYAMA
Article type: Article
Session ID: F-9
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The earlier thermal network system identification theory required observed values for every node in the model, which sometimes makes it difficult to get a model with sufficient nodes for tracing actual phenomena. States inside walls, and, in the case of ventilation measurement, states of ceiling or attic spaces, are frequently unobservable. Mathematically it becomes a problem of system parameter identification when only some variables can be observed out of an original higher order state equation model. This paper offers a solution by introducing a higher differentiation of the variables, and verifies this theory with a computational experiment as a simple example.
View full abstract
-
Masaki TAJIMA, Takao SAWACHI, Minoru OKABE, Haruki OSAWA
Article type: Article
Session ID: F-10
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The purpose of this study is to verify and to estimate measurement methods of air flow rate on domestic ventilation systems employing small diameter ducts. The experiments, which focus on the accuracy in the field, were conducted by using 6 measurement instruments. According to the experimental results, measurement instruments applying to the k-factor method have high accuracy and airflow meters using hot wires have relatively high accuracy for suction air.
View full abstract
-
Yasukazu KAWARAGUCHI, Kenichi MIYAJIMA, Takao SAWACHI, Masaki TAJIMA, ...
Article type: Article
Session ID: F-11
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
In this study, we report on a database of the components of housing ventilation system. The revised building standards act requires to set up ventilation equipments in residences, but design method and properties of housing ventilation system, such as duct system, is not sufficient. This database is based on an investigation for 5 ventilation system companies, and contains the properties such as pressure-flow amount curve, friction loss coefficient, etc. this database will help us to calculate the ventilation amount of houses by ventilation circuit calculation software, and to analyze or estimate the properties of ventilation systems comprehensively.
View full abstract
-
Takeshi HIRANO, Takashi KURABUCHI, Akihiro ARASHIGUCHI, Masaki TAJIMA, ...
Article type: Article
Session ID: F-12
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Synopsis: Multiple measurement methods for effective ventilation rate ratio of heat exchangers were defined and tested on five commercially available units. A method to keep tracer gas concentration around the heat exchanger unit the same as the return air by covering whole unit and return duct with test chamber turned to be useful in evaluating the carry-over flow effect around the unit to supply air. Significant difference of identified effective ventilation rate ratio was observed among the tested units. It will be predicted that effective ventilation rate ratio will be changed because of the length of duct or the changing of the pressure balance that is caused by outer environment in the duct. Also, a flow network model of air to air heat exchanger unit was developed and successfully applied to reproduce experimented conditions.
View full abstract
-
Miyuki NOGUCHI, Kazukiyo KUMAGAI, Hiroshi YOSHINO, Minoru FUJII, Yumik ...
Article type: Article
Session ID: F-13
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Ventilation is the most effective procedure to reduce indoor air pollutant. Volatile organic compounds (VOCs), which cause health related symptoms, are often detected in the indoor environment. The way of ventilation should be decided depending on the VOCs level. VOCs level and air exchange rate are usually measured individually. This study will propose a simple method to measure both the ventilation rate by perflourocarbon tracer gas technique (PFT) and VOCs concentration at once by using a single sampler. A glass vial with a diffusion cap on top was selected as a doser, filled with perfluorocarbon (PFC). A thermal desorption (TD) tube packed with carbon adsorbent was used as a sampler. TD and a gas chromatograph - mass spectrometer (GC-MS) was employed for injection and analysis, respectively. Selected analysis conditions enable to separate VOCs as well as PFC. According to this method, low cost, less complex and shorter time for analysis were to be possible.
View full abstract
-
Narihiko TAKEHARA, Ryuichi Kawachi, Hiroaki SASAKI
Article type: Article
Session ID: F-14
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
We examined about a state of the down draft around an air supplying register and the condensation by a central exhaust ventilation system in cold region. We made the experiment about three kinds of ventilation register, a circle type, a square type, an oblong type, an air-temperature were to change and a ventilation volume were to change. The result of the experiment was that the square register which was insulated has the most efficient.
View full abstract
-
Satoru MINENO, Takao SAWACHI, Jun-ichirou MATSUNAGA, Hitoshi TAKEDA, M ...
Article type: Article
Session ID: F-15
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The purpose of this study is to estimate the ventilation performance of the humidity sensitive whole house ventilation system, which controls the exhaust quantity by relative humidity. Using supply air openings and exhaust air openings, which can change the opening area by detecting humidity, can control exhaust airflow rate. By the measured results of humidity, concentration of carbon dioxide and ventilation rates, it was shown that there were fewer differences between controlling by humidity system and constant exhaust air volume system. So, it might show the possibility of energy consumption.
View full abstract
-
Katsuyoshi ISHIKAWA, Takashi KURABUCHI, Manabu YAMAMOTO, Akihiro ARASH ...
Article type: Article
Session ID: F-16
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Because of amendment of the Construction Standard Law, almost all houses must equip with a full time mechanical ventilation system. However, people could feel cold draft in sanitary area when the ventilation system provides sufficient volume of air. So, an investigation using thermal manikin was carried out to find out proper exhaust flow rate from thermal sensational point of view. It was found that flow rate less than 20 CMH and 50 CMH would be appropriate for bathroom and toilet, respectively to avoid uncomfortable sensation in cold season based on the evaluated EHT and PMV.
View full abstract
-
Hiroshi SAKO, Masaaki HIGUCHI, Takayoshi SHIBAHARA, Hiroaki TAKAI, Mas ...
Article type: Article
Session ID: F-17
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Night purge system and natural ventilation and hybrid air-conditioning are installed to reduce energy conservation. This paper reports field measurement of a thermal environment and energy conservation in the office building utilizing natural energy. This paper will report that utilization of night purge system and natural ventilation could reduce air conditioning load by 9% and also could reduce AHU operation time by 29%.
View full abstract
-
Masao TSUJI, Masaki TAJIMA, Takao SAWACHI, Hironao SETO, Hiroshi NAKAG ...
Article type: Article
Session ID: F-18
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Measurements of ventilation rate and ventilation performance were conducted on a two-storey test house employing a stack effect ventilation system in winter. The ventilation performance index OSRF indicates relatively 1.0 when the temperature differences between inside and outside is larger than 10 deg in K, by the results of measurements and theoretical calculations. It is able to operate hybrid controlling by use of a fan and stack effect by detecting the temperature difference of 10 degree.
View full abstract
-
Ken-ichi SATO, Takao SAWACHI, Hironao SETO, Akira HOYANO
Article type: Article
Session ID: F-19
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
We predicted and surveyed about the wind power ventilation performance of the hybrid ventilation system for residence. First, from the pressure drop characteristics, such as each parts, and the ventilation performance was predicted by ventilation network. Moreover, the amount of ventilation was measured in the experiment residence. Consequently, prediction and survey were mostly in agreement.
View full abstract
-
Masayuki OGAWA, Satoshi SHOYA
Article type: Article
Session ID: G-1
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Since a desiccant air-cooling system (DCS) is driven by low-level waste heat, it is promising as a heat use of small cogeneration system (CGS). We conducted the operational experiments of DCS, which use micro gas turbine (MGT) exhaust gas for regeneration directly. This experiment revealed that DCS has a practically sufficient controllability with simple instrumentation system, and shows better performance with latent heat treatment in outside air processing than in return air processing.
View full abstract
-
Makoto KOGANEI, Norio SHODA, Yoshiaki KASHIWASE
Article type: Article
Session ID: G-2
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The results of laboratory measurements on the performance of the HVAC system powered by wind generator, solar cell, and solar air heater, are described. Experiments were performed in various weather conditions both in winter and summer. The experimental results show that 30-90% of thermal energy to regenerate the desiccant in this system and 20-65% of the energy to power the system were supplied by natural energy in summer, and 30-97% of the energy to power the system was supplied by natural energy in winter.
View full abstract
-
Noriaki SATO, Akira ESAKI, Kenji TAKESAKO, Shinichi YONEKI, Kenichi YA ...
Article type: Article
Session ID: G-3
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The VAV systems have the problem of the maldistrbuting of the out door air volume, the restriction of the control range and the increase the air volume to maintain the out door air volume of the minimum volume zone. We developed the VAV system to guarantee the out door air volume of the zones to solve those problems. We measured the energy consumption of the air-conditioning unit and the control performance in the building through the year of the system. As a result,we found the effect of the system to reduce the fan power over 20% through year and the high control performance.
View full abstract
-
Hironori KIMURA, Tatsuo OKA
Article type: Article
Session ID: G-4
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Many VAV systems have been adopted from the expectation for energy-saving effect in recent years. It is important to estimate the energy-saving volume of fan power input for VAV systems. According to the previous reports of the simulation method of fan power load and the testing result of fan power total efficiency for VAV systems, It is recognized that this estimate of the fan power input electrical consumption indicates approximately actual measurement result.
View full abstract
-
kenichi FUJII, yoshihiko TANAKA, takashi SATO
Article type: Article
Session ID: G-5
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Recently, a large difference of temperature air-conditioning system is often designed for the purpose of aiming at energy saving by reducing conveyance power. However, the fall of the system COP of a chiller is caused depending on a temperature setup, In this report, we consider about these temperature setups.
View full abstract
-
Hideki SATO, Toshiko KANBE
Article type: Article
Session ID: G-6
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
In this study, in order to reduce energy consumption, we arranged the control method of a room, which requires regulated temperature and humidity, with a packaged air conditioner. Stability of temperature in the room and annual energy consumption were examined. Even when the compressor turned on or off, this control method was possible to keep the fluctuation of temperature lower than 0.3℃. Therefore we accomplished to save energy and holding stability in temperature by using this method.
View full abstract
-
Hirofumi SASAKI, Hiroyuki TSUDA
Article type: Article
Session ID: G-7
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
With the aim of developing a high performance, hybrid air-conditioning system driven by low temperature waste heat, assessment and fundamental studies were performed on the following key technologies: demonstration of a hybrid cycle made up of absorption and compression cycles. Since the heat source of the absorption cycle is supplied as 60℃ hot water, single effect cycle cannot be operated. Moreover, there is no actual example such a hybrid cycle. In this paper, we report that these subjects were solved and we succeeded in the demonstration of the hybrid cycle.
View full abstract
-
Masayuki ICHINOSE, Hisaya ISHINO, Kimiko KOHRI, Akihiro NAGATA, Tatsuo ...
Article type: Article
Session ID: G-8
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Oasis 21 consists of planted park, semi basement open space and glazed roof with water pond. Oasis 21 has unparalleled feature in not only appearance and space design, but also environmental engineering aspect: shading effect by water pond, ventilating effect by shape of the space and relaxation effect of heat island phenomenon by planted park and water pond. So, we investigate this building at summer, autumn and winter in 2003, by measuring temperature and humidity, wind direction and velocity, radiant flux, sensible and latent heat flux at all round of this building. These papers are compilation of analysis results of measurement from three points of view. This paper: Partl presents radiant environment with operative temperature containing short and long wave-band radiation, especially shading effect of solar pond caused by spectral selectivity at near infrared region.
View full abstract
-
Akihiro NAGATA, Hisaya ISHINO, Kimiko KOHRI, Tatsuo NAGAI, Hiroshi OHG ...
Article type: Article
Session ID: G-9
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The underground open space in OASIS 21 is a semi-outdoor space. It has a glass roof with a pond but has no wall above ground. Therefore its environment is strongly influenced by the natural wind. In this study, ultrasonic anemometers are placed above the glass roof and in the underground space to measure wind speed and direction. The vertical velocity distribution in the underground space and the wind speed and direction of underground pathways are also measured.
View full abstract
-
Satoshi NAKAYAMA, Hisaya ISHINO, Kimiko KOHRI, Akihiro NAGATA, Tatsuo ...
Article type: Article
Session ID: G-10
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
We measured the sensible and latent heat flux on the glass roof with water pond and the grass yard at the Oasis2l. The sensible heat flux on the water pond was 1/10 times larger than on the grass. The Bowen ratio is 2.0 on the grass and 0.2 on the water pond. And we suggested a possibility that the measurement of sensible heat flux above the void area using Scintillometer. The heat flux and temperatures around grass surface was calculated by numerical models. In as a consequence, the flux value was calculated almost properly. The thermal impacts of Oasis2l that the influence to the around thermal environment and radiant environment and so on are confirmed.
View full abstract
-
Tetsuya MAEKAWA, Kiyotaka DEGUCHI
Article type: Article
Session ID: G-11
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
This study deals with water evaporative cooling by means of roof spraying. The research is aimed at gaining maximum cooling effect on roof water spraying system. Therefore, compare to the other similar research, this research sets higher water supply rate. The passive cooling effect in buildings and the optimum rate of water supply are examined experimentally through the use of two experimental structures. The paper shows the quantitative relationship between the rate of water supply and cooling effect by setting two different types of water supply rate, one is 30.79kg/m^2・h. and the other is 45.29kg/m^2・h. By analyzing the result of experiment and comparing to the other similar research, relationship between the rate of water supply and cooling effect are clarified. The higher the water supply rate, the more the cooling effects.
View full abstract
-
Kuniaki ANDO, Hideo ASADA, Hitoshi Takeda
Article type: Article
Session ID: G-12
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The purpose of this study is to reveal a cooling performance of a water spraying cooling system using Photo-Catalytic coated nylon sheet. We had done a measurement on thermal environment during Dec. to Nov. '03 using two insulated boxes which has Photo-Catalytic coated plastic sheet at the roof, the one roof was sprayed and the other was not. The result shows that outer surface temperature of the roof were dropped about 8 to 10℃ and interior air temperature was also dropped about 4 to 6℃ as a result of water spraying. According to a thermal energy analysis, coefficient of mass transfer on a nylon surface was about 0.002 to 0.009 kgl(m2・s・(kg/kg')).
View full abstract
-
Tsukasa TSUKIDATE, Akira FUKUSHIMA, Yoshiji ITO, Toshihiro HANAKA
Article type: Article
Session ID: G-13
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The ventilation exhaust and ground source heat pump system was operated with the under floor heating system using Σ beam in the experimental house. This system achieved 3.5 of the COP. This system could also reduce the size of the ground heat exchanger by 40% and brings reduction in costs. The under floor heating system using Σ beam has suitable radiation performance for the operation of heat pump and the advantage in which whole building floor heating can be economically achieved because of easy installation without needing panels.
View full abstract
-
Haruhito OONISHI, Kikuo NAITO, Takeshi KONDO, Tadahiko IBAMOTO, Masahi ...
Article type: Article
Session ID: G-14
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
An experiment on questionnaire to subjects was done with the intention to grasp of the indoor thermal environment and to compare a heating system with others. The responses to questionnaire that is on comfort and thermal sensation were investigated with the measured data. The thermal sensation at feet suggests that subjects were feeling warmer with thermal storage in electric floor heating system than with fun coil unit system. Even if the heat generation rate of electric heater is less than this experiment, thermal storage in electric floor heating system is likely to keep up comfortable environment.
View full abstract
-
Takeharu SUGIE, Koji SAKAI, Masaki MANABE
Article type: Article
Session ID: G-15
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Purpose of this study is evaluation about adaptability of the thermal storage type floor heating/cooling system using the heat pump. In this paper, we reported on system outline, the heat storage experiment result of floor cooling with a full-scale model and room temperature simulation. In an experiment result, we confirmed this system keeps room temperature at 24 degrees and the possible of dew condensation prevention by control of supply water temperature. As the results of the simulation using heat balance model, we obtained that the tendency of the simulation agreed well with the experiment.
View full abstract
-
Kazuyuki KOBAYASHI, Kayako HAMANAKA, Kazutoshi KUSAKARI, Tomohiro MIZU ...
Article type: Article
Session ID: G-16
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
We have developed a high-efficiency hot water floor heating panel of which upward radiation ratio was improved up to 90% compared with a conventional hot water floor heating panel without loss of comfort level. It has been also turned out that total energy consumption of whole hot water floor heating system could be minimized by this developed panel.
View full abstract
-
Hiroshi HASEGAWA, Shin-ichi AKABAYASHI, Jun SAKAGUCHI
Article type: Article
Session ID: G-17
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
This research developed the indoor environmental test chamber, which controls the each surfaces temperature of the floor, wall and ceiling, using cold and warm water radiation panel. And, it is reported the basic performance data of the environment test chamber. The result of the measurement is as follows: (1) Both vertical and horizontal temperature distribution is 21-22 C on the floor heating, and the temperature distribution is uniform. (2) The temperature difference using the air conditioner is larger than floor heating. (3) The cold draft of the window in winter can be simulated with this chamber.
View full abstract
-
Makoto TANAKA, Ryusuke GOTOHDA, Minoru TAKAHASHI
Article type: Article
Session ID: G-18
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
In semiconductor fabrication and other fine-processing fields, measurements and precision processes have become common. This has generated a need for precision temperature-control systems that minimize temperature fluctuations, which can have a negative effect on measurement accuracy. This report investigates the improvement of water temperature-control performance,air temperature control using a special heater and the control of air temperature fluctuation using a heat accumulator all with the aim of improving control performance. The results of this study were applied to a high-precision temperature-control system achieving an air-temperature variation within ±0.002℃.
View full abstract
-
Koji SUZUKI, Jiro MAEYAMA, Tomoaki YOSHIDA
Article type: Article
Session ID: G-19
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
By spot air conditioning for a machine manufacture factory, a air outlet is prepared to each worker, and the conditioned air is supplied. And variable temperature and preassure air coditioning can save air conditioning energy, if a worker's thermalcomfott is not spoiled.This report is about the controller with variable temperature and preassure.
View full abstract
-
Satoru YAMAZAKI, Tadahiko IBAMOTO, Hirosi MURAKAMI
Article type: Article
Session ID: G-20
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The cooling method by "Wet Air Cooling" can hold a high humidity state, it is thought that it is effective in cooling and long-term preservation.Then, paying attention to agricultural products, prediction is tried from a viewpoint of humidity and wind velocity in an outage phenomenon, and suppose an actual measurement and a prediction value that comparison examination is carried out.
View full abstract
-
Kiyoshi HIWATASHI, Kazuhiko UMEDA, Yasushige MORIKAWA, Tomonari ITO, T ...
Article type: Article
Session ID: G-21
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
We studied on improvement of thermal environment and energy saving of a freezer open showcase as which a lower inlet system was adopted by a full-scale experiment. (1) This system is effective in solving cold aisle. (2) Cold aisle is mostly solved in the state of airflow volume of a lower inlet of 965m^3/h. (3) This system is effective in heat recovery. It is possible to reuse the recovered heat for reducing heat load of a air handling unit by returning duct and soon. (4) The heat recovery rate of this system is about 70.4% (2.9kW, 965m3^/h)
View full abstract
-
Kouhei KUWABARA, Tetsumi HORIKOSHI, Tohru MOCHIDA
Article type: Article
Session ID: H-1
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The object of this study is to propose an evaluation method for an outdoor thermal sensation. This paper focuses on the relationships between SET^*, ETS and thermal sensation, comfort sensation obtained from experimental data using subjects in outdoor environment. Experiments are carried out in Nagoya and Sapporo in summer and winter. The comfort range of SET^* and ETS in outdoor thermal environment are determined from experimental results.
View full abstract
-
Masaru ABUKU, Shuichi HOKOI, Satoru TAKADA
Article type: Article
Session ID: H-2
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Sweating is an important factor in the heat balance of human body. Sweat is a solution mainly composed of NaCl and water, while it is usually treated as pure water. The main influence of the salt on heat and moisture transfer is a vapor pressure depression and the change in the liquid water diffusivity. In order to study these effects quantitatively an infiltration experiment was carried out, and the results were analyzed by the simultaneous transfer model of heat, moisture and salt in clothing.
View full abstract
-
Hiroaki TANAKA, Shuichi HOKOI, Satoru TAKADA
Article type: Article
Session ID: H-3
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
When we enter an air-conditioned room with sweat on the skin and in the clothing, after walking in a hot and humid environment such as outdoors in summer, the gradual sweat evaporation has influence on the heat balance of the human body. In this study, to predict transient regional response of micro climate and human body dressed in several layers of clothing, it is calculated by making use of combined model which consists of Stolwijk-model and simultaneous heat and moisture transfer model for thermal and hygric behavior of clothing. The calculated results agreed with those of laboratory experiments.
View full abstract
-
Shin-ichi TANABE, Takahiro SATO, Ryosuke WADA
Article type: Article
Session ID: H-4
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
From the point of view of energy saving, there is a need for quantitative evaluation of "comfort" in such space as interior of automobile, personal air-conditioning space, and semi-outdoor space, to efficiently control the thermal condition about human body. And so, the new thermoregulation model REAL (Refined Thermoregulation Model Considering the Effects of Moisture Absorption Load) was developed. REAL is taken account of the effects of heat moisture absorption, which is often observed in moving spaces among environments with differences of humidity. At the experiments, the phenomena of moisture absorption were observed.
View full abstract
-
Shin-ichi TANABE, Takahiro SATO, Ryosuke WADA
Article type: Article
Session ID: H-5
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
The new thermoregulation model REAL (Refined Thermoregulation Model Considering Effects of Moisture Absorption Load) was developed. REAL is taken account of effects of heat moisture absorption, which is often observed in moving spaces among environments with differences of humidity. In order to verify the accuracy of calculation by REAL, the calculation results and the results of experiments were compared. From the comparison, the validity of this model was confirmed fairly well. Additionally, a case of application using REAL is shown that thermal comfort about human exposed to low humidity air movement.
View full abstract
-
Shin-ichi TANABE, Junta NAKANO, Takeshi MORII, Masashi TAKAHASHI, Yuri ...
Article type: Article
Session ID: H-6
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Additional field survey was conducted during high summer in 2003 to supplement the yearly survey results presented in the earlier paper. The questionnaire responses and corresponding sets of environmental data added up tp 2807. Occupancy period was observed to decrease in the non-HVAC spaces when the daily mean outdoor temperature exceeded 25℃. The clothing insulation tended to decrease in the HVAC spaces when air tempertaure rose, while the value was nearly constant at around 0.5 clo in the non-HVAC spaces during summer. Mean thermal sensation vote differed between the occuapnts in non-HVAC spaces and those in HVAC spaces under the same SET^* condition. Occupants tended to be more tolerant of cooler environmental conditions than warmer environmental conditions.
View full abstract
-
Shin-ichi TANABE, Junta NAKANO, Takeshi MORII, Masashi TAKAHASHI, Yuri ...
Article type: Article
Session ID: H-7
Published: August 20, 2004
Released on J-STAGE: August 31, 2017
CONFERENCE PROCEEDINGS
FREE ACCESS
Today, semi-outdoor spaces like an open structured terrace are often designed. Main use in semi-outdoor environments is short-term occupancy, so occupants in semi-outdoor environments are considered to be expecting thermal comfort different from indoors. In this study, semi-outdoor and indoor cafeteria was selected to investigate the behavioral adaptation of occupants in relation to environmental conditions. Field surveys were conducted in the winter of 2002 and summer of 2003. As behavioral adaptations, the ratio of occupants choosing to sit in semi-outdoor space and those choosing to sit indoors, clothing insulation and term of occupation were observed. Questionnaire survey was conducted separately to investigate psychological responses. Through the surveys, difference of behavioral adaptation was seen between semi-outdoor and indoor space.
View full abstract
