scholarly journals Performance analysis of a two-stage variable capacity air source heat pump and a horizontal loop coupled ground source heat pump system

2021 ◽  
Author(s):  
Amir Alizadeh Safa
Keyword(s):  
Heat Pump ◽  
Ground Source Heat Pump ◽  
Outdoor Temperature ◽  
Cooling Mode ◽  
Two Stage ◽  
Pump System ◽  
Air Source Heat Pump ◽  
Ground Source ◽  
Variable Capacity ◽  
Heating Mode

The thermal performance of a new two-stage variable capacity air source heat pump (ASHP) and a horizontal ground loop ground source heat pump (GSHP) was investigated side-by-side at the Archetype Sustainable Twin Houses located in Toronto, Canada. The heat pumps were tested in cooling mode, as well as heating mode under extreme winter conditions. In cooling mode, the ASHP COP ranged from 4.7 to 5.7 at an outdoor temperature of 33 degrees C and 16 degrees C respectively, while the GSHP COP ranged from 4.9 (at an ELT of 8.5 degrees C and EST of 19.2 degrees C) to 5.6 (at an ELT of 12. 4 degrees C and EST of 17.8 degrees C). In heating mode, the ASHP COP ranged from 1.79 to 5.0 at an outdoor temperature of -19 degrees C and 9 degrees C respectively, while the GSHP COP ranged from 3.05 (at an ELT of 44.4 degrees C and an EST of 2.7 degrees C) to 3.44 (at an ELT of 41.5 degrees C and an EST of 5.48 degrees C) during the earlier winter test period. Data extrapolation and energy simulation was also performed to predict annual heat pump performance in Toronto as well as other Canadian regions.

scholarly journals Performance analysis of a two-stage variable capacity air source heat pump and a horizontal loop coupled ground source heat pump system

2021 ◽  
Author(s):  
Amir Alizadeh Safa
Keyword(s):  
Heat Pump ◽  
Ground Source Heat Pump ◽  
Outdoor Temperature ◽  
Cooling Mode ◽  
Two Stage ◽  
Pump System ◽  
Air Source Heat Pump ◽  
Ground Source ◽  
Variable Capacity ◽  
Heating Mode

The thermal performance of a new two-stage variable capacity air source heat pump (ASHP) and a horizontal ground loop ground source heat pump (GSHP) was investigated side-by-side at the Archetype Sustainable Twin Houses located in Toronto, Canada. The heat pumps were tested in cooling mode, as well as heating mode under extreme winter conditions. In cooling mode, the ASHP COP ranged from 4.7 to 5.7 at an outdoor temperature of 33 degrees C and 16 degrees C respectively, while the GSHP COP ranged from 4.9 (at an ELT of 8.5 degrees C and EST of 19.2 degrees C) to 5.6 (at an ELT of 12. 4 degrees C and EST of 17.8 degrees C). In heating mode, the ASHP COP ranged from 1.79 to 5.0 at an outdoor temperature of -19 degrees C and 9 degrees C respectively, while the GSHP COP ranged from 3.05 (at an ELT of 44.4 degrees C and an EST of 2.7 degrees C) to 3.44 (at an ELT of 41.5 degrees C and an EST of 5.48 degrees C) during the earlier winter test period. Data extrapolation and energy simulation was also performed to predict annual heat pump performance in Toronto as well as other Canadian regions.

scholarly journals Experimental study of the performance of a vertical and a horizontal ground loops coupled to a ground source heat pump system

2021 ◽  
Author(s):  
Waleed S. Alzahrani
Keyword(s):  
Heat Pump ◽  
Ground Source Heat Pump ◽  
Cooling Mode ◽  
Pump System ◽  
Heat Pump System ◽  
Heating And Cooling ◽  
Ground Source ◽  
Vertical Ground ◽  
Set Up ◽  
Heating Mode

The performance of vertical and horizontal ground loops coupled to a Ground-Source Heat Pump (GSHP) was investigated under four different scenarios. For this purpose, an experimental set-up was designed and constructed at the Archetype Sustainable houses in Vaughan, Ontario, Canada. In the first two tests, the two vertical ground loops coupled to the GSHP were tested in heating, and cooling modes. In heating mode, the GSHP COP ranged between 2.7 and 3.15. In cooling mode, the GSHP performed better than the heating mode with COP range of 3.75 and 5.4. In the last two tests, two scenarios were tested to compare the horizontal and the vertical ground loops in cooling mode. In the first scenario, the ground loop flow was divided equally between the loops and the GSHP overall COP was 5.42. The last test used equal Reynolds number in both loops and the GSHP overall COP was 5.36.

scholarly journals Experimental study of the performance of a vertical and a horizontal ground loops coupled to a ground source heat pump system

2021 ◽  
Author(s):  
Waleed S. Alzahrani
Keyword(s):  
Heat Pump ◽  
Ground Source Heat Pump ◽  
Cooling Mode ◽  
Pump System ◽  
Heat Pump System ◽  
Heating And Cooling ◽  
Ground Source ◽  
Vertical Ground ◽  
Set Up ◽  
Heating Mode

The performance of vertical and horizontal ground loops coupled to a Ground-Source Heat Pump (GSHP) was investigated under four different scenarios. For this purpose, an experimental set-up was designed and constructed at the Archetype Sustainable houses in Vaughan, Ontario, Canada. In the first two tests, the two vertical ground loops coupled to the GSHP were tested in heating, and cooling modes. In heating mode, the GSHP COP ranged between 2.7 and 3.15. In cooling mode, the GSHP performed better than the heating mode with COP range of 3.75 and 5.4. In the last two tests, two scenarios were tested to compare the horizontal and the vertical ground loops in cooling mode. In the first scenario, the ground loop flow was divided equally between the loops and the GSHP overall COP was 5.42. The last test used equal Reynolds number in both loops and the GSHP overall COP was 5.36.

scholarly journals Data-Driven Optimization for Capacity Control of Multiple Ground Source Heat Pump System in Heating Mode

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3595
Author(s):  
Guiqiang Wang ◽  
Haiman Wang ◽  
Zhiqiang Kang ◽  
Guohui Feng
Keyword(s):  
Heat Pump ◽  
Rapid Development ◽  
Optimal Operation ◽  
Data Driven ◽  
Optimization Approach ◽  
Ground Source Heat Pump ◽  
Capacity Control ◽  
Pump System ◽  
Ground Source ◽  
Heating Mode

With the rapid development of ground source heat pump (GSHP) system, energy saving measures are of special interest for practice. In order to meet heating demand, capacity control of GSHP system can be carried out by regulating either part load ratio (PLR) or supply water temperature. A data-driven optimization approach was developed and applied on a school building in heating mode, which aims at minimizing energy consumption without compromising thermal comfort. An artificial neural network (ANN) model of the GSHP system was proposed and trained with experimental data as well as simulated data of a validated physics-based model, which was employed for data supplement to cover more data variations. The multi-objective optimization problem was then solved using genetic algorithm. The results suggest the optimal operation strategy for either continuous or staged capacity control regarding heating demand variation. With the proposed optimal control strategy, energy savings as compared to existing strategy can be up to 22% for a single month and 14% for the whole heating season.

Analysis and Study of Solar-Assisted Heat Pump System

2013 ◽  
Vol 671-674 ◽  
pp. 2122-2125
Author(s):  
Qi Wang ◽  
Qiang Wang ◽  
Xiao Yang Hui ◽  
Zhi Jun Shi
Keyword(s):  
Solar Energy ◽  
Heat Pump ◽  
Water System ◽  
Hot Water ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Operating Modes ◽  
Air Source Heat Pump ◽  
Ground Source

Composition and operating modes of two different solar-assisted heat pump systems have been introduced in this paper. The advantages of compound heat pump system are analyzed compared with solo heat pump system. Solar-assisted air source heat pump system not only has the advantages, which air source heat pump system (ASHP) has, but also makes good use of renewable solar energy. It can provide cooling, heating and living hot water all the year. Solar-assisted ground source heat pump system realizes advantage complementation in various seasons between solar heat water system and ground source heat pump (GSHP) system. Solar-assisted ground source heat pump system can adjust the system operating model to solve the disadvantage of sole GSHP system, whose performance decrease for the temperature change of soil for long time operating with annual cool and heat unbalancedness. GSHP system can effectively increase the operating stability with the assistance of solar energy.

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