Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan
Online ISSN : 2424-0486
Print ISSN : 0385-275X
ISSN-L : 0385-275X
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Volume 40, Issue 222
Displaying 1-15 of 15 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    2015 Volume 40 Issue 222 Pages Cover1-
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_Cover1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Article type: Cover
    2015 Volume 40 Issue 222 Pages Cover2-
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_Cover2
    JOURNAL FREE ACCESS
    Download PDF (7438K)
  • [title in Japanese]
    Article type: Index
    2015 Volume 40 Issue 222 Pages Toc1-
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_Toc1
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  • [title in Japanese]
    Article type: Appendix
    2015 Volume 40 Issue 222 Pages App1-
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_App1
    JOURNAL FREE ACCESS
    Download PDF (63K)
  • [title in Japanese]
    Article type: Appendix
    2015 Volume 40 Issue 222 Pages App2-
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_App2
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    Download PDF (63K)
  • [title in Japanese]
    Article type: Appendix
    2015 Volume 40 Issue 222 Pages App3-
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_App3
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  • [title in Japanese]
    Article type: Appendix
    2015 Volume 40 Issue 222 Pages App4-
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_App4
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  • [title in Japanese]
    Article type: Appendix
    2015 Volume 40 Issue 222 Pages App5-
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_App5
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  • Experimental Study on Ventilation Requirements of Exhaust Hood for Multiple Cooking Appliances
    Toshiya IWAMATSU, Wataru URABE
    Article type: Article
    2015 Volume 40 Issue 222 Pages 1-12
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_1
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    The purpose of this research was to investigate the ventilation requirements of an exhaust hood for multiple cooking appliances. We measured capture efficiencies of exhaust hoods installed over single and multiple cooking appliances. Provided that the permissive level of capture efficiency is 90%, the ventilation rates of exhaust hoods for a fryer, noodle cooker, and IH table (single cooking appliance) were 430m^3/h, 375m^3/h, and 330m^3/h, respectively. The ventilation rates of exhaust hoods for a fryer with two IH tables and a noodle cooker with two IH tables (multiple cooking appliances) were 730m^3/h and 800m^3/h, respectively. The sum of the ventilation rates of exhaust hoods for a fryer with IH tables and a noodle cooker with IH tables were 1090m^3/h and 1035m^3/h, respectively. The sum of the ventilation rates for single appliances is higher than that measured in the case of exhaust hoods for multiple appliances. These results indicate that the capture and containment performance of exhaust hoods for multiple cooking appliances is higher than that of exhaust hoods for single cooking appliances. It suggests that the sum of the ventilation rates for single cooking appliances is the simplest way to estimate the ventilation rates for multiple appliances.
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  • Effectiveness of Air Conditioner Design Conditions and Room Temperature for Air Conditioning Equipment Selection on Energy Conservation and Thermal Environment
    Masaya HIRAOKA, Hideharu KOMODA, Masaya OKUMIYA, Gyuyoung YOON
    Article type: Article
    2015 Volume 40 Issue 222 Pages 13-21
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_13
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    The tight energy supply and demand situation in Japan in the aftermath of the Great East Japan Earthquake of 2011 has raised awareness of energy conservation in buildings. In order to achieve further energy conservation, a review of the margins applied in equipment selection is urgently needed as part of a review of the conventional internal heat generation load conditions such as the lighting load and power sockets in calculating the air conditioning load. Multisplit package-type air conditioning systems for building use have increasingly been adopted in office buildings and other buildings. In this research, a model building was established to study such a system. Then, heat load calculation programs and the appropriate simulation tools were used to assess the building's energy conservation performance under different heat generation conditions, and the margin for the rate of simultaneous operation of outdoor units for equipment selection was varied. In addition to the energy aspects, an overall assessment was also performed for the effect on the indoor air temperature and initial cost. Moreover it was possible to ensure a comfortable thermal environment, achieve energy efficient operation, and reduce the life cycle costs (LCC)by appropriately the equipment capacities.
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  • Method for Calculating Equipment Capacity Determined by Room Air Temperature Deviation
    Hiroshi OHGA
    Article type: Article
    2015 Volume 40 Issue 222 Pages 23-31
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_23
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    Although design air-conditioning loads have been calculated on the basis of the excess probability of climatic design conditions, the room air temperature deviation from the set point caused by the lack of equipment capacity has been neglected. This paper provides a calculation method for the equipment capacity determined by the room air temperature deviation. The thermal load calculation is repeated until the room air temperature deviation becomes less than the required permission level. The number of repetitions of the equipment capacity reduction is minimized by using the first term of the weighting factors. The calculated equipment capacity results determined by the room air temperature deviation are compared with the conventional calculation results for various loads. As a result of the comparison, the actual weather years are more suitable for this calculation than the reference year. For this reason, the actual years are more severe than the reference year. As a result, the reference year cannot reproduce the actual years.
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  • Performance Estimate of Vertical Inflow Diffuser in Temperature-stratified-type Thermal Storage Tank by CFD Analysis
    Takeshi IWATA, Kazunobu SAGARA, Hiroaki KITANO, Hisaya NAGAI
    Article type: Article
    2015 Volume 40 Issue 222 Pages 33-40
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_33
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    A thermal energy storage (TES) air-conditioning system has been introduced into many buildings in Japan. The tank of water TES is classified into two types: a labyrinth type and a temperature-stratified type, according to the water-mixing conditions. This study focuses on the temperature-stratified water TES tank, where water with a different temperature is stored by the density difference without mixing. First, a series of experiments was conducted in order to examine the fundamental performance of the temperature-stratified thermal storage tank with a vertical-inflow inlet. Second, we verified the validity by comparing the transient temperature changes/distributions in the TES tank obtained by computational fluid dynamics (CFD) with some experiments. Third, on the basis of the above-mentioned results, a parameter required to predict the performance of the temperature-stratified thermal storage tank with a vertical-inflow inlet was identified from the CFD analysis results under various conditions. From the above, it was clarified that the parameter estimation equation/curve for predicting the performance of the temperature-stratified thermal storage tank with a vertical-inflow inlet is able to be created using a series of CFD analysis results.
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  • [title in Japanese]
    Article type: Appendix
    2015 Volume 40 Issue 222 Pages App6-
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_App6
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  • Practical Study on Performance Assessment of Turning Flow Nozzle Humidifier for Air Handling Unit under Actual Heat Load
    Shigehiro ICHINOSE, Hideki TANAKA, Yuuki USAMI, Naoko KODAMA
    Article type: Article
    2015 Volume 40 Issue 222 Pages 41-48
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_41
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    The winter load in office buildings has been decreasing in recent years owing to improvements in the building insulation and the increasing number of OA instruments. Under these conditions, moistening performance of existing water-spray-type humidifiers deteriorates because temperature just after a hot water coil or in front of a humidifier falls in accordance with the decreasing heating operation. Aiming to cope with this situation, a humidifier for an air handling unit using a turning flow nozzle whose spray particle size is small and uniform compared to existing water-spray-type humidifier had been developed and installed into our office building, located in Matsumoto city. A performance assessment for two years from fiscal year 2012 to 2013 during winter under actual load was carried out to verify the indoor environment, energy savings and so on. Operational optimization was also taken into practice in fiscal year 2013 from the data obtained from the previous year. In addition, a spray water evaporative cooling effect test from the humidifier was also carried out during the midseason to verify the application possibility of the developed humidifier as a cooling device instead of the existing air-conditioning system. A Series of trial results from this practical study is shown in this paper. It was found that the developed humidifier's energy saving performance during winter is equivalent to the existing one and the humidifier maintains its efficiency even under low heat load conditions.
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  • [title in Japanese]
    Article type: Cover
    2015 Volume 40 Issue 222 Pages Cover3-
    Published: September 05, 2015
    Released on J-STAGE: September 05, 2017
    DOIhttps://doi.org/10.18948/shase.40.222_Cover3
    JOURNAL FREE ACCESS
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