Enhanced Ground Source Heat Pump System With Thermal Storage System

2018 ◽  
Author(s):  
Hirotoshi Taira ◽  
Takashi Sato ◽  
Takao Kakizaki ◽  
Masahito Oguma
Keyword(s):  
Heat Pump ◽  
Heat Load ◽  
Thermal Storage ◽  
Storage Device ◽  
Ground Source Heat Pump ◽  
Capacity Control ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Consumption Efficiency

The short-cycling operation of a heat pump decreases energy consumption efficiency. Short-cycling operations of GSHP (Ground Source Heat Pump System) occur when the ON / OFF control of a heat pump is used a partial load condition. It is considered effective that GSHP with capacity controls installs to suppress short-cycling operations. However, there is no report on any continuous operations by capacity control GSHP in actual operations. We confirmed that GSHP (water to water) with capacity control operates short-cycling in the residence. Short-cycling operations were occurred a sudden load fluctuation due to opening or closing of the valves. We conducted effective verification experiments of the thermal storage device at the artificial heat load fluctuations condition. When the thermal storage device installed upstream brine circulation line of the heat pump with the capacity control, continuous operations are performed. It was under the condition at the heating heat load of 5 kW is turned ON / OFF every 20 minutes. In this case, energy consumption efficiency of a heat pump is 13% higher than the efficiency without the thermal storage device.

Enhanced Ground Source Heat Pump System With Thermal Storage System

2019 ◽  
Vol 141 (6) ◽  
Author(s):  
Hirotoshi Taira ◽  
Takashi Sato ◽  
Takao Kakizaki ◽  
Masahito Oguma
Keyword(s):  
Heat Pump ◽  
Heat Load ◽  
Thermal Storage ◽  
Storage Device ◽  
Ground Source Heat Pump ◽  
Capacity Control ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Consumption Efficiency

The short-cycling operation of a heat pump decreases energy consumption efficiency. Short-cycling operations of ground source heat pump system (GSHP) occur when the ON/OFF control of a heat pump is used in a partial load condition. It is considered effective that GSHP with capacity controls installs to suppress short-cycling operations. However, there is no report on any continuous operations by capacity control GSHP in actual operations. We confirmed that GSHP (water to water) with capacity control operates short-cycling in the residence. Short-cycling operations occurred with a sudden load fluctuation due to opening or closing of the valves. We conducted effective verification experiments of the thermal storage device at the artificial heat load fluctuations condition. When the thermal storage device installed upstream brine circulation line of the heat pump with the capacity control, continuous operations are performed. It was under the condition at the heating heat load of 5 kW is turned ON/OFF every 20 min. In this case, energy consumption efficiency of a heat pump is 13% higher than the efficiency without the thermal storage device.

scholarly journals Study on the Performance of a Ground Source Heat Pump System Assisted by Solar Thermal Storage

Energies ◽  
2015 ◽  
Vol 8 (12) ◽  
pp. 13378-13394 ◽  
Author(s):  
Yu Nam ◽  
Xin Gao ◽  
Sung Yoon ◽  
Kwang Lee
Keyword(s):  
Heat Pump ◽  
Thermal Storage ◽  
Solar Thermal ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source

Effect of a Cumulative Cold and Heat Load Ratio on Hybrid Ground-Source Heat Pump System Performance Parameters

2015 ◽  
Vol 1092-1093 ◽  
pp. 26-35
Author(s):  
Jun Jie Zhang ◽  
Ling Hong Xu ◽  
Heng Min ◽  
Ling Yun Wang
Keyword(s):  
Energy Consumption ◽  
Heat Pump ◽  
Heat Load ◽  
Specific Energy Consumption ◽  
Load Ratio ◽  
Ground Source Heat Pump ◽  
Performance Parameters ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source

The imbalance in cold and heat load in large public buildings located in a cooling-dominated areas is apparent. To explore the effect of a cumulative cold and heat load ratio (CCHLR) on the performance parameters of the hybrid ground-source heat pump system (HGSHPS) of large public buildings, this study selects a Wuhan office building as the simulation object. When this model is considered as the prototype, five other building models whose CCHLR interval is relatively uniform can be developed. The full-year dynamic loads of the six models were calculated with Designer’s Simulation Toolkits. The 20-year simulation of the six HGSHPS models was conducted with TRNSYS. Then, the performance parameters of the HGSHPS model under different CCHLR values were studied and compared. These parameters included the average soil temperature, exiting fluid temperature (ExFT) of the ground heat exchanger (GHE), average energy efficiency ratio, and specific energy consumption (the electrical energy required to obtain per kilowatt cooling or heating capacity) of the heat pump system. Simulation results indicated that with the increase in CCHLR, the average soil temperature rapidly increases, the ExFT of the GHE increases to a value that is considerably higher than the suggested standard, and the specific energy consumption of the system increases.

Performance analysis of photovoltaic-thermal road assisted ground source heat pump system during non-heating season

Solar Energy ◽  
2021 ◽  
Vol 221 ◽  
pp. 10-29
Author(s):  
Bo Xiang ◽  
Yasheng Ji ◽  
Yanping Yuan ◽  
Chao Zeng ◽  
Xiaoling Cao ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Heat Pump ◽  
Ground Source Heat Pump ◽  
Heating Season ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source
Sign in / Sign up

Export Citation Format

Share Document