A comparison of ground and air source heat pump performance for domestic applications: A case study in Perth, Australia

2021 ◽  
Author(s):  
Tine Aprianti ◽  
Evan Tan ◽  
Chan Diu ◽  
Ben Sprivulis ◽  
Greg Ryan ◽  
...  
Keyword(s):  
Heat Pump ◽  
Pump Performance ◽  
Air Source Heat Pump

scholarly journals Analysis of Cold Air Recirculation in the Evaporators of Large-Scale Air-Source Heat Pumps Using CFD Simulations

Fluids ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 186
Author(s):  
Brice Rogié ◽  
Jonas Kjær Jensen ◽  
Svenn Ole Kjøller Hansen ◽  
Wiebke Brix Markussen
Keyword(s):  
Heat Pump ◽  
Large Scale ◽  
Sudden Change ◽  
District Heating ◽  
Heat Pumps ◽  
Cfd Model ◽  
Additional Energy ◽  
Cold Air ◽  
Air Source Heat Pump

The present study investigates cold air recirculation in the evaporators of large-scale air-source heat pumps. A case study considered a 5 MW air-source heat pump producing heat for district heating. The heat pump comprises 20 horizontal evaporators, where each evaporator is equipped with eight fans. The evaporators were implemented in a CFD model, where the influence of the outdoor wind direction on the recirculation was investigated. Firstly, the air recirculation was analysed with no surrounding obstacles. Secondly, the surrounding building and the real ground topology was included in the CFD model, to analyse their influence on the air recirculation. The results show that recirculation occurs for all wind directions, due to the turbulent behaviour of the flow around the evaporators. The results also show that the presence of a building intensifies the recirculation when it is placed directly upstream of the evaporators due to the presence of vortices in the wake of the building. On the other hand, a ground depression helps to reduce the recirculation by having additional energy dissipation due to the sudden change in the ground direction.

Reduction in on-off operations of an air source heat pump with active thermal storage and demand response: An experimental case study

2021 ◽  
Vol 36 ◽  
pp. 102401 ◽  
Author(s):  
Qinglong Meng ◽  
Xiaoxiao Ren ◽  
Wenqiang Wang ◽  
Chengyan Xiong ◽  
Yang Li ◽  
...  
Keyword(s):  
Heat Pump ◽  
Demand Response ◽  
Thermal Storage ◽  
Air Source Heat Pump

Improving cold climate air-source heat pump performance with refrigerant mixtures

2015 ◽  
Vol 78 ◽  
pp. 695-703 ◽  
Author(s):  
Ali Hakkaki-Fard ◽  
Zine Aidoun ◽  
Mohamed Ouzzane
Keyword(s):  
Heat Pump ◽  
Cold Climate ◽  
Pump Performance ◽  
Air Source Heat Pump ◽  
Refrigerant Mixtures
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