Results 121 to 129 of about 470 (129)

An experimental study on the uneven refrigerant distribution over a vertically installed multi-circuit outdoor coil in an air source heat pump unit during reverse cycle defrosting

Applied Thermal Engineering, 2015
Abstract For an air source heat pump (ASHP) unit with a vertically installed multi-circuit outdoor coil, many parameters would affect system defrosting performance, especially the uneven distribution of refrigerant for each circuit and downwards flowing of melted frost due to gravity from up circuit(s) to down circuit(s).
Mengjie Song, Zhihua Wang, Ning Mao, Zhao Li, Ying Chen   +4 more
openaire   +1 more source

An investigation on the efficient reverse cycle defrosting strategy for microchannel heat exchanger heat pump system

Journal of Building Engineering, 2023
Tong Xiong, Guoqiang Liu, Siyuan Wang, Gang Yan, Jianlin Yu   +4 more
openaire   +1 more source

Development, Calibration and Validation of A Dynamic Modeling Framework for Air-Source Heat Pumps Under Cycling of Frosting and Reverse-Cycle Defrosting

This thesis presents a comprehensive dynamic modeling and model calibration framework and experimental validations for air-source heat pumps under cycling of frosting and reverse-cycle defrosting operations.
openaire   +1 more source

Performance Analysis of a Solar Thermal Storage-Based Frost Suppression and Enhanced Reverse-Cycle Defrosting Heat Pump System in Cold and Humid Environments

Aiming at the significant performance degradation of air-source heat pumps (ASHP) caused by evaporator frosting under low-temperature, high-humidity conditions, this paper proposes and experimentally validates an innovative method that couples solar hot-water thermal-storage-assisted frost suppression with enhanced reverse-cycle defrosting.
Jianhuan Deng, Ming Li, Yunfeng Wang, Ying Zhang, Guoliang Li, Muchi Yao, Chen Deng, Lu Zhou, Shiji Shan, Jun Zhong   +9 more
openaire   +1 more source

A reduced-order model for optimized uneven defrosting of an air source heat pump during reverse cycle defrosting

Energy and Buildings
Hamid Ikram, Aaron Alexander, Christian K. Bach   +2 more
openaire   +1 more source

Performance of an automotive reversible CO2 heat pump system during periodic frosting-defrosting cycles

Applied Thermal Engineering
Wenying Zhang, Wenzhe Li, Pega Hrnjak
openaire   +1 more source

Reverse cycle defrost method and apparatus

2017
MICKA JOEL, DECKER MARK
openaire   +1 more source

Experimental Investigation on the Multi-Mode Heat Discharge Process of a PCM Heat Exchanger During TES Based Reverse Cycle Defrosting Using in Cascade Air Source Heat Pumps

Applied Thermal Engineering, 2019
Minglu Qu, Jianbo Chen
exaly  

Enhancing reverse-cycle defrosting performance in CO₂ heat pump systems for electric buses: experimental investigation of metal thermal storage and horizontal exchanger configuration

International Journal of Refrigeration
Qiang Lei, Chensi Zhang, Xia Song, Junye Shi, Jiangping Chen   +4 more
openaire   +1 more source