Field Study on Winter Heating Performance of the Air Source Heat Pump System in Cold Regions

2020 ◽  
Vol 38 (1) ◽  
pp. 213-222
Author(s):  
Feng Xu ◽  
Xin Chen ◽  
Hongxi Zhang ◽  
Yongjiang Shi
Keyword(s):  
Field Study ◽  
Heat Pump ◽  
Pump System ◽  
Cold Regions ◽  
Heat Pump System ◽  
Heating Performance ◽  
Air Source Heat Pump

Heating Performance Investigations on Two Applications of a Solar Assisted Air Source Heat Pump System

2011 ◽  
Vol 374-377 ◽  
pp. 284-287 ◽  
Author(s):  
Yu Wang ◽  
Yu Wen You ◽  
Zhi Gang Zhang
Keyword(s):  
Heat Pump ◽  
Solar Collector ◽  
Coefficient Of Performance ◽  
Experimental Investigations ◽  
Pump System ◽  
Heat Pump System ◽  
Heating Performance ◽  
Air Source Heat Pump

A solar assisted air source heat pump (SAASHP) system is proposed to improve heating performance of air source heat pump (ASHP).The proposed system has been applied in two buildings, a series of experimental investigations were conducted in the both applications, it indicated that the SAASHP system gets better heating performance than ASHP system, the coefficient of performance (COP) gets 10% and 65% increase respectively in two applications. It is also concluded that the ratio of solar collector area to construction area significantly affects the improvement of heating performance in SAASHP system. This work may promote further research and more applications of SAASHP system.

scholarly journals An Experimental Study on External Ventilation to the Heating Performance of Household Air Source Heat Pump

2021 ◽  
Vol 9 ◽  
Author(s):  
Hang Zou ◽  
Zhanqiang Liu ◽  
Enshen Long
Keyword(s):  
Heat Pump ◽  
Great Influence ◽  
Heat Pumps ◽  
Coefficient Of Performance ◽  
Pump System ◽  
Heat Pump System ◽  
Heating Performance ◽  
Air Source Heat Pump ◽  
Ventilation Condition ◽  
Ventilation Conditions

The external ventilation conditions have a great influence on the heating performance of the air source heat pump (ASHP) systems. The outdoor units of residential household air source heat pumps are often installed in narrow spaces such as balconies. The ventilation conditions of the outdoor unit will influent the heating performance of the air source heat pump. It is necessary to study the effect of the outdoor unit ventilation conditions on the heating performance of residential household heat pumps. This paper experimentally studied the heating performances of an air source heat pump system with the outdoor unit mounted in a balcony in different external ventilation conditions. The results indicate that the ventilation conditions for the outdoor units have a significant effect on the heating performance of the system. When the inlet of the outdoor unit was close to the sliding door and completely blocked, the ventilation environment was the worst and the coefficient of performance (COP) was the lowest. In addition, the unfavorable ventilation environment could result in a reduction of the COP by 26.2%. When the inlet of the outdoor unit was partially blocked, the heating performance could be improved and the COP was also slightly improved. The great heating performance was obtained under the cross-ventilation condition. This paper can guide the design of the installation position of the household air source heat pump outdoor units in actual engineering.

Design of Air Source Heat Pump System Based on BP Network Prediction

2018 ◽  
Author(s):  
Zhang Guihong ◽  
Yang Yi ◽  
Chen Jianbo ◽  
Mei Tianxiang ◽  
Gu Haiqin ◽  
...  
Keyword(s):  
Heat Pump ◽  
Pump System ◽  
Bp Network ◽  
Heat Pump System ◽  
Air Source Heat Pump ◽  
Network Prediction

Rational assessment and selection of air source heat pump system operating with CO2 and R407C for electric bus

2022 ◽  
Vol 182 ◽  
pp. 86-101
Author(s):  
Haidan Wang ◽  
Yulong Song ◽  
Yiyou Qiao ◽  
Shengbo Li ◽  
Feng Cao
Keyword(s):  
Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Air Source Heat Pump ◽  
Electric Bus ◽  
System Operating ◽  
Selection Of

scholarly journals Field Test on Performance of an Air Source Heat Pump System Using Novel Gravity-Driven Radiators as Indoor Heating Terminal

2021 ◽  
Vol 9 ◽  
Author(s):  
Jie Jia ◽  
Xuan Zhou ◽  
Wei Feng ◽  
Yuanda Cheng ◽  
Qi Tian ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Heat Pump ◽  
Field Test ◽  
Thermal Response ◽  
Heat Output ◽  
Pump System ◽  
Heat Pump System ◽  
Air Source Heat Pump ◽  
Gravity Driven ◽  
Indoor Comfort

The simultaneous need for energy efficiency and indoor comfort may not be met by existing air source heat pump (ASHP) technology. The novelty of this study lies in the use of a new gravity-driven radiator as the indoor heating terminal of ASHPs, aiming to provide an acceptable indoor comfort with improved energy efficiency. To confirm and quantify the performance improvement due to the proposed system retrofit, a field test was conducted to examine the system performance under real conditions. In the tests, measurements were made on the refrigerant- and air-side of the system to characterize its operational characteristics. Results showed that the proposed radiator has a rapid thermal response, which ensures a fast heat output from the system. The proposed system can create a stable and uniform indoor environment with a measured air diffusion performance index of 80%. The energy efficiency of the proposed system was also assessed based on the test data. It was found that the system’s first law efficiency is 42.5% higher than the hydraulic-based ASHP system. In terms of the second law efficiency, the compressor contributes the most to the overall system exergy loss. The exergy efficiency of the proposed system increases with the outdoor temperature and varies between 35.02 and 38.93% in the test period. The research results and the analysis methodology reported in this study will be useful for promoting the technology in search of energy efficiency improvement in residential and commercial buildings.

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