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Volume 15 (1984 - 198･･･
- Issue 3 Pages 8-
- Issue 2 Pages 1-
- Issue 1 Pages 7-
Volume 15, Issue 2
Displaying 1-3 of 3 articles from this issue
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Experimental Evaluation of Factorial Effects for thermal Radiant Environment in Gable Roofed Open-type Livestock BarnsMasayoshi MINOWA, Tomoharu YAMAGUCHI, Yoshiyasu AIHARA1985 Volume 15 Issue 2 Pages 1-16
Published: January 25, 1985
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSIn order to verify the results of a numerical analysis of the effects of different dimensional factors on radiant heat coming downward on to an infinitesimal horizontal surface in a gable roofed open-type barn, the authors compared the calculatecd radiant heat rate with the measured one in existent barns. The radiant heat rate on the surface of a swine was also measured to evaluate the results of the analysis concerning the radiant heat load of a real swine. Some conclusions follow.
1) Though the calculated values of the radiant beat rate were larger than the measured ones, the calculating procedures seemed to be adequate for practical use in the design of thermal radiant environment in barns (Figs. 4, 6, 7 and Table 5).
2) It was suggested that the equations obtained from the results of the analysis could be applied practically to the design of the radiant environment in barns to easily predict the radiant heat rate (Table 6).
3) From the measurement of the radiant heat rate on the surface of a swine (Figs. 8 to 10), the factorial effect based on the radiant heat rate on an infinitesimal horizontal surface tended to estimate the effect based on the radiant heat load of a real swine higher.View full abstractDownload PDF (4079K) -
Development of Vector Radiant ThermometerShyusaku KATAYAMA1985 Volume 15 Issue 2 Pages 17-23
Published: January 25, 1985
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSCharacteristics of a Vector Radiant Thermometer (VRT meter) which is used for measuring a dirction and strength of thermal radiation is described. A theory of the VRT meter is based on heat balance at each face of a cube.
A measurement of heat thransfer using the VRT meter was carrid out in a wind tunnel. The convective heat transfer coefficient at each face of the VRT meter were obtained.
Comparison was made between value from the VRT meter, and a net radiometer and other instruments, error of the VRT meter was within 6 percent.
It was proved that the VRT meter can be used satisfactorily for measuring the thermal radiation environment in livestock buildings.View full abstractDownload PDF (2309K) -
Thermal Radiant Environment of Swine Buildings with Different Structures and Ridge DirectionsShyusaku KATAYAMA, Takafumi KAWANISHI, Jun DOHKOSHI, Morimasa NAGASHIM ...1985 Volume 15 Issue 2 Pages 24-29
Published: January 25, 1985
Released on J-STAGE: September 05, 2011
JOURNAL FREE ACCESSThe indoor thermal radiation of three swine buildings which have different structures and ridge directions was measured with a Vector radiant thermometer. One of the buildings is environmentally contoroled and built in North-South ridge direction. The other two are naturally ventilated and built in the ridge directions of North-South and East-West, respectively.
The results are summarized as follows:
1) The indoor thermal radiation of the environmentally controled swine building was less influenced by solar radiation than the naturally ventilated buildings.
2) The indoor thermal radiation of the naturally ventilated swine building were storongly affected by reflected solar radiation and thermal rdiation from surroundings.
3) A celling and insulated roof markedly reduced thermal radiation.
4) It was proved that the Vector radiant thermometer was useful to evaluated the thermal radiant environment in livestock buildings.View full abstractDownload PDF (732K)
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