Numerical evaluation of the performance of a single-well groundwater source heat pump system in Beijing, China

Abstract

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.

Building integrated renewable energy

“…The heating area under intermittence operation was 4000 m 2 more than that under continuous operation. Xu et al. (2020a) further simulated the performance of a single-well groundwater source heat pump system in Beijing, China and found that the output temperature for a single well serving an area of 9000 m 2 during the heating season was 11–15°C.…”

“…The heating area under intermittence operation was 4000 m 2 more than that under continuous operation. Xu et al (2020a) further simulated the performance of a single-well groundwater source heat pump system in Beijing, China and found that the output temperature for a single well serving an area of 9000 m 2 during the heating season was 11-15 C. Solar energy utilization is very important to help reduce the building energy consumption and even achieve net zero energy buildings. Zhou et al (2021) proposed a solar integrated vacuum freeze-dryer and building air conditioning system, where a solar absorption refrigeration system provides cooling to both the building space and the freeze-dryer.…”

Distribution Characteristics and Enrichment Mechanism of Fluorine Icons in Geothermal Water in Beijing

“…In Northern China, Ruoxi Yuan et al examined the significance of fluorine indications in the mediumlow temperature convection geothermal system in the northeast of Hebei Province. [5][6][7][8][9] However, few studies have focused on the content of fluoride ions in Beijing and its surrounding areas. This paper takes the underground hot water in Beijing as the research object, aiming to address the problem of high fluorine content in the underground hot water.…”

Effects of the operation parameters of a closed-type heating tower on the performance of heating tower heat pump system

“…The heat is then transported to the evaporator of the water-source heat pump unit and subsequently released to generate high temperature heat for users such as buildings. The HTHP mitigates issues such as frost, which is prevalent in evaporators of conventional air-source heat pump systems, and the constraints of geological conditions present in water-source/geothermal heat pump systems (Kim et al, 2017;Liu et al, 2019aLiu et al, , 2019bWang et al, 2019;Xu et al, 2020). Therefore, HTHPs have attracted significant research attention in recent years.…”