Optimization model analysis of centralized groundwater source heat pump system in heating season

Shallow geothermal energy is stable and clean. Using a heat pump to produce groundwater and realize heating and cooling can effectively prevent haze and reduce energy consumption. To reduce engineering costs, many buildings in Beijing, China, plan to utilize single-well groundwater source heat pumps. Numerical modeling is an effective way to gain an understanding of thermal transport processes. However, wellbore-reservoir coupling and the uncertainty of productivity due to geological parameters make simulation difficult. A wellbore-reservoir-integrated fluid and heat transport model is defined by T2Well simulator to predict the productivity of a typical single-well system, with consideration of complex geological factors. The model is validated by the analytical model developed in Beijing, China. The fluid processes in the wellbore are described by 1 D non-Darcy flow, and the reservoir 3 D fluid and heat transport processes are calculated. Six crucial factors satisfying a random distribution are used, and for a single well that can supply heat for an area of 9000 m2, the output temperature during the heating season ranges from 11°C to 15°C.

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A techno-economic optimization model of a biomass-based CCHP/heat pump system under evolving climate conditions

Energy Conversion and Management ◽

10.1016/j.enconman.2020.113256 ◽

2020 ◽

Vol 223 ◽

pp. 113256 ◽

Cited By ~ 3

Author(s):

Moritz Wegener ◽

Anders Malmquist ◽

Antonio Isalgue ◽

Andrew Martin ◽

Pol Arranz ◽

...

Keyword(s):

Heat Pump ◽

Optimization Model ◽

Economic Optimization ◽

Pump System ◽

Climate Conditions ◽

Heat Pump System

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A TRNSYS/GROCS Simulation of the TECH House I Ground-Coupled Series Solar-Assisted Heat Pump System

Journal of Solar Energy Engineering ◽

10.1115/1.3266406 ◽

1983 ◽

Vol 105 (4) ◽

pp. 446-453 ◽

Cited By ~ 1

Author(s):

D. J. Roeder ◽

R. L. Reid

Keyword(s):

Heat Pump ◽

Storage Tank ◽

Heating System ◽

Electric Resistance ◽

Heating Season ◽

Pump System ◽

Heat Pump System ◽

Seasonal Performance ◽

The University ◽

Better Than

The series solar-assisted heat pump heating system with ground-coupled storage in The University of Tennessee’s TECH House I in Knoxville, Tennessee, has been modeled using TRNSYS/GROCS and was compared to the experimental performance for the 1980–81 heating season. The simulation results were within 8 percent of the experimental measurements. Both simulation and experimental results showed that ground coupling of thermal storage led to the elimination of electric resistance backup heat and a large reduction in the peak heating demand of the house. Results of a parametric study showed that, in general, a ground-coupled storage tank performs better than a storage tank placed outdoors in the Knoxville area. Application of a next generation heat pump resulted in the most significant impact on the seasonal performance factor. As expected, higher performance collectors and larger collector areas led to higher system seasonal performance. An economic analysis showed that the series solar heat pump system cannot economically compete with the stand-alone heat pump system in the Knoxville area.

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Simulation-based analysis of a ground source heat pump system using super-long flexible heat pipes coupled borehole heat exchanger during heating season

Energy Conversion and Management ◽

10.1016/j.enconman.2018.03.001 ◽

2018 ◽

Vol 164 ◽

pp. 132-143 ◽

Cited By ~ 18

Author(s):

Xiaoyuan Wang ◽

Yinfeng Wang ◽

Zhi Wang ◽

Yuxuan Liu ◽

Yuezhao Zhu ◽

...

Keyword(s):

Heat Exchanger ◽

Heat Pump ◽

Heat Pipes ◽

Ground Source Heat Pump ◽

Heating Season ◽

Borehole Heat Exchanger ◽

Pump System ◽

Heat Pump System ◽

Ground Source ◽

Simulation Based

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Experimental Study on Automatic Switching of Solar Coupled Groundwater Source Heat Pump System

Journal of Physics Conference Series ◽

10.1088/1742-6596/2095/1/012077 ◽

2021 ◽

Vol 2095 (1) ◽

pp. 012077

Author(s):

Xiaoming Zhang ◽

Qiang Wang ◽

Qiujin Sun ◽

Mingyu Shao

Keyword(s):

Energy Efficiency ◽

Heat Pump ◽

Average Energy ◽

Energy System ◽

Hot Water ◽

Efficiency Ratio ◽

Pump System ◽

Heat Pump System ◽

Domestic Hot Water ◽

Groundwater Source

Abstract There have been few practical applications of solar coupled groundwater source heat pump (GWHP) systems in large public buildings, and data on this technology are scarce. A solar coupled GWHP system was investigated in this study. The system uses an underground water source heat pump system for heating in winter, cooling in summer, and providing part of the domestic hot water, and it also uses a solar energy system to prepare domestic hot water. These two types of energy are complementary. The system was tested throughout the cooling season. This experiment ran from May 10, 2021, to September 10, 2021. The results show that the system can guarantee the indoor design temperature and the supply of domestic hot water. The solar water heating system operated for 1233 min in the summer; hot water (2334 m3) was prepared. During the summer, the average energy efficiency ratio of the GWHP unit was approximately 4.88. The energy efficiency ratio of the entire system was approximately 3.34. Such projects can play a key role in demonstrating this type of system.

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