درباره ما
ASHRAE 4770
Energy Performances of Prototype VAV and CAV Systems under Simulated Humid Tropical Climates
Year: 2005
Abstract: This paper reports the relative energy consumption of prototype VAV and CAV air-conditioning systems under various load conditions simulating those of a typical office building in humid tropical climates such as Singapore 's. Tests were conducted inside two adjoining environmental chambers where space loading was varied from 0.21 7 to 0.295 kW/m2 (68.81 to 93.54 Btu/h ft2 ) with corresponding sensible heat ratio (SHR) ranging from O. 65 to 0.9. The VAV system consistently consumed less energy compared to the CAV system under constant as well as variable load conditions. The percentage energy saving ranged from 21.97%at0.21 7kW/m2 (68.81 Btu/h ft2) to 12.42% at 0.295 kW/m2 (93.54 Btu/hft2) under constant loading, and it decreased with increased space loading. The experiments measured moderate energy savings under the experimental conditions that are assumed to be the typical load condition in Singapore. Because the implementation costs are significant, it appears that a VAV system has marginal economic benefit in Singapore.
Show full item record
| contributor author | ASHRAE - American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. | |
| date accessioned | 2017-09-04T18:05:03Z | |
| date available | 2017-09-04T18:05:03Z | |
| date copyright | 01/01/2005 | |
| date issued | 2005 | |
| identifier other | GIQYHBAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/188005 | |
| description abstract | This paper reports the relative energy consumption of prototype VAV and CAV air-conditioning systems under various load conditions simulating those of a typical office building in humid tropical climates such as Singapore 's. Tests were conducted inside two adjoining environmental chambers where space loading was varied from 0.21 7 to 0.295 kW/m2 (68.81 to 93.54 Btu/h ft2 ) with corresponding sensible heat ratio (SHR) ranging from O. 65 to 0.9. The VAV system consistently consumed less energy compared to the CAV system under constant as well as variable load conditions. The percentage energy saving ranged from 21.97%at0.21 7kW/m2 (68.81 Btu/h ft2) to 12.42% at 0.295 kW/m2 (93.54 Btu/hft2) under constant loading, and it decreased with increased space loading. The experiments measured moderate energy savings under the experimental conditions that are assumed to be the typical load condition in Singapore. Because the implementation costs are significant, it appears that a VAV system has marginal economic benefit in Singapore. | |
| language | English | |
| title | ASHRAE 4770 | num |
| title | Energy Performances of Prototype VAV and CAV Systems under Simulated Humid Tropical Climates | en |
| type | standard | |
| page | 8 | |
| status | Active | |
| tree | ASHRAE - American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.:;2005 | |
| contenttype | fulltext |