Experimental Study of Dry-bulb and Wet-bulb Temperature Variations on Performance of Ducted Heat Pump
To analyze effects of dry-bulb and wet-bulb temperatures (D&WBTs) on unit performance, experimental research on cooling capacity and EER of ducted heat pump are studied by means of air-enthalpy method when D&WBTs change in ±1.0 ℃/±0.5 ℃ of variations set in national standard GB/T 17758—2010....
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2015-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2015.04.078 |
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| Summary: | To analyze effects of dry-bulb and wet-bulb temperatures (D&WBTs) on unit performance, experimental research on cooling capacity and EER of ducted heat pump are studied by means of air-enthalpy method when D&WBTs change in ±1.0 ℃/±0.5 ℃ of variations set in national standard GB/T 17758—2010. Results show that the ducted heat pump is in best working condition when indoor and outside DBT reach lower limit of variation ﹣1 ℃ and WBT reach upper limit of variation +0.5 ℃. EER of unit is 2.8, which is 3.26% higher than the value measured in standard condition. The indoor WBT was found out to be the most significant factor with influence coefficient of 0.0464, followed by the outdoor DBT with influence coefficient of ﹣0.0340. If DBT ±0.3 ℃ and WBT ±0.1 ℃ is provided to judge the energy efficiency class of air conditioner unit, the measurement error of EER drops from ±3.5% to ±1%. |
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| ISSN: | 0253-4339 |