Effect of Cold Energy Storage of Multi-Wells Aquifer Thermal Energy Storage in Sanhejian Coal Mine

2011 ◽  
Vol 382 ◽  
pp. 276-280 ◽  
Author(s):  
Yi Zhang ◽  
Dong Ming Guo
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Volume Change ◽  
Coal Mine ◽  
Thermal Energy Storage ◽  
Water Body ◽  
Cold Water ◽  
Energy Utilization ◽  
Cold Energy ◽  
Temperature Water

In practical work, implementation of the technology of aquifer thermal energy storage(ATES) is divided into energy storage phase and energy utilization phase. Sufficient cold/warm water is stored in energy storage phase, and the stored cold/warm water is consumed in energy utilization phase, so as to achieve the purpose of cooling or heating. In this paper, taking Sanhejian Coal Mine as an example, we analyze the effect of cold energy storage in multi-wells by analyzing the volume change of cold water body within different temperature ranges in different periods. Through the analysis of volume change of cold water body, it can prove in the cooling process, all of the 2-5°C cold water body is consumed, and then the 5-10°C cold water body is consumed. The volume of 10-15°C cold water body is stable, because with the consumption of colder water, part of low temperature water body changes into high temperature water body, adding the 10-15°C cold water body in aquifers. And in condition 1, there are almost the same volume of 2-5°C, 2-10°C and 2-15 °C cold water in the four cold energy storage wells.The running of 1-1’ wells, 2-2’ wells, 3-3’ wells and 4-4’ wells by sequence, all of the 2-5°C cold water body is consumed, and the 5-10°C cold water body is the mainly cold water body for cooling, and the consumption of 10-15°C cold water body is small. It proves that the cooling wells normally run, and the cold water body for cooling is sufficient, which can meet the need of cooling.

Effect of Cold Energy Storage of Single-Well Aquifer Thermal Energy Storage in Sanhejian Coal Mine

2012 ◽  
Vol 430-432 ◽  
pp. 1433-1436
Author(s):  
Yi Zhang ◽  
Dong Ming Guo
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Volume Change ◽  
Coal Mine ◽  
Water Body ◽  
Cold Water ◽  
Irrigation Flow ◽  
Single Well ◽  
Cold Energy ◽  
Temperature Ranges

Effective implementation of technology of aquifer thermal energy storage (ATES) must form a "ground cold water reservoir" or "ground warm reservoir". In this paper, taking Sanhejian Coal Mine as an example, we analyze the effect of cold energy storage in single-well by analyzing the volume change of cold water body within different temperature ranges. Through the analysis of volume change of cold water body, it can prove that with the same irrigation temperature, the increase of irrigation flow makes the volume and percentage of cold water body in aquifer within different temperature ranges. And the impact on the cold water of 2-5°C is more obvious. With the same irrigation flow, both the cold water body and its percentage of 2-10°C in the condition of 2°C irrigation temperature are more than those in the condition of 5°C. The increase of irrigation flow and the decrease of irrigation temperature are beneficial to cold energy storage, and the effect of cold energy storage of the condition 3 (100m3/h irrigation flow and 2°C irrigation temperature) is the best in these four conditions.

Temperature Field of Doublet-Wells Aquifer Thermal Energy Storage in Sanhejian Coal Mine

2012 ◽  
Vol 430-432 ◽  
pp. 746-749
Author(s):  
Yi Zhang ◽  
Dong Ming Guo
Keyword(s):  
Temperature Field ◽  
Energy Storage ◽  
Thermal Energy ◽  
Coal Mine ◽  
Thermal Energy Storage ◽  
Water Body ◽  
Small Reduction ◽  
Irrigation Flow ◽  
Aquifer Thermal Energy Storage ◽  
Cold Energy

Utilizating of tube-well irrigation, the technology of aquifer thermal energy storage (ATES) store rich cold energy in winter and cheap warm energy in summar into aquifers seasonally. In this paper, taking Sanhejian Coal Mine as an example, we discuss that with the same pumping and irrigation flow in doublet wells, distribution and change of temperature field in aquifers both at the end of energy storage and after the period of no pumping and no irrigation. The simulation results of aquifer temperature field show that 2~10°C water body of aquifers is decreasing in the period of no pumping and no irrigation, but it is only a small reduction with a stable trend. And after the period of no pumping and no irrigation, about 11°C water body of aquifers stores steadily in the aquifer, so the selected aquifers is suitable and its effect of energy storage is good.

Temperature Field of Single-Well Aquifer Thermal Energy Storage in Sanhejian Coal Mine

2011 ◽  
Vol 415-417 ◽  
pp. 1028-1031
Author(s):  
Yi Zhang ◽  
Dong Ming Guo
Keyword(s):  
Temperature Field ◽  
Energy Storage ◽  
Low Temperature ◽  
Thermal Energy ◽  
Coal Mine ◽  
Temperature Region ◽  
Thermal Energy Storage ◽  
Cold Water ◽  
Confined Aquifer ◽  
Irrigation Flow

The technology of aquifer thermal energy storage(ATES) is an energy-saving technology which can provide a solution to energy shortages and resources expasion. The first key point of this technology is whether the aquifer can be use to store energy. In this paper, taking Sanhejian Coal Mine as an example, we choose Quaternary upper loose sandy porosity confined aquifer to bottom clayed glavel porosity confined aquifer as aquifers thermal energy storage, to discuss whether the aquifers can be used to store energy. The simulation results of aquifer temperature field show that the selected aquifers reach the goal of energy storage. And with the same irrigation flow, the lower the temperature, the more the cold water and the larger the low temperature region in aquifers thermal energy storage. With the same irrigation temperature, the lager the irrigation flow the more the cold water and the larger the low temperature region in aquifers thermal energy storage.

Temperature Field of Multi-Wells Aquifer Thermal Energy Storage in Sanhejian Coal Mine

2011 ◽  
Vol 138-139 ◽  
pp. 442-446 ◽  
Author(s):  
Yi Zhang ◽  
Dong Ming Guo
Keyword(s):  
Temperature Field ◽  
Energy Storage ◽  
Thermal Energy ◽  
Coal Mine ◽  
Thermal Energy Storage ◽  
Cold Water ◽  
Storage System ◽  
Water Reservoir ◽  
Aquifer Thermal Energy Storage ◽  
Water Well

When production needs, the technology of aquifer thermal energy storage (ATES) can achieve cooling or heating by running the “underground cold water reservoir” or the “underground heat water reservoir”. In this paper, taking Sanhejian Coal Mine as an example, we discuss that with the same pumping and irrigation flow in multi-wells, distribution and change of temperature field in aquifers when energy storage system runs. The simulation results of aquifer temperature field show that any cold water well running can make temperature around the centerlin rise, and the rate rose from 0.4 °C to 6 °C as time increases. Any cold water well running can make the lowest temperature of other cold water wells around it rise 0.4°C or 0.5°C, the temperature of the aquifer whose temperature is below 15°C rises about 1°C or 2°C. It proves that the distance of wells is reasonable. When the whole system runs, the temperature field of 2°C to 10°C change greatly, the temperature field of 10°C to 15°C is stable, which is less affected by heat energy consumption in cold water well.

scholarly journals Numerical Modeling of the Interference of Thermally Unbalanced Aquifer Thermal Energy Storage Systems in Brussels (Belgium)

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6241
Author(s):  
Manon Bulté ◽  
Thierry Duren ◽  
Olivier Bouhon ◽  
Estelle Petitclerc ◽  
Mathieu Agniel ◽  
...  
Keyword(s):  
Energy Storage ◽  
Groundwater Flow ◽  
Heat Transport ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Cold Water ◽  
Cooling System ◽  
Joint Operation ◽  
Groundwater Temperature ◽  
Aquifer Thermal Energy Storage

A numerical model was built using FEFLOW® to simulate groundwater flow and heat transport in a confined aquifer in Brussels where two Aquifer Thermal Energy Storage (ATES) systems were installed. These systems are operating in adjacent buildings and exploit the same aquifer made up of mixed sandy and silty sublayers. The model was calibrated for groundwater flow and partially for heat transport. Several scenarios were considered to determine if the two ATES systems were interfering. The results showed that a significant imbalance between the injection of warm and cold water in the first installed ATES system led to the occurrence of a heat plume spreading more and more over the years. This plume eventually reached the cold wells of the same installation. The temperature, therefore, increased in warm and cold wells and the efficiency of the building’s cooling system decreased. When the second ATES system began to be operational, the simulated results showed that, even if the heat plumes of the two systems had come into contact, the influence of the second system on the first one was negligible during the first two years of joint operation. For a longer modeled period, simulated results pointed out that the joint operation of the two ATES systems was not adapted to balance, in the long term, the quantity of warm and cold water injected in the aquifer. The groundwater temperature would rise inexorably in the warm and cold wells of both systems. The heat plumes would spread more and more over the years at the expense of the efficiency of both systems, especially concerning building’s cooling with stored cold groundwater.

Utilization and Research on Medium-Enthalpy and Low-Enthalpy Geothermal Energy in WSHP System

2011 ◽  
Vol 374-377 ◽  
pp. 392-397
Author(s):  
Yi Zhang ◽  
Dong Ming Guo ◽  
Da Liu
Keyword(s):  
Temperature Field ◽  
Energy Storage ◽  
Heat Pump ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Geothermal Energy ◽  
Heating And Cooling ◽  
Cooling Conditions ◽  
Cold Energy ◽  
Seasonal Weather

Geothermal energy is a stable energy, stored underground and not influenced by the geographical, seasonal weather and the change of day and night. Medium-enthalpy and low-enthalpy geothermal energy are distributed in many areas of China, having a broad prospect for development. Taking water resources heat pump (WSHP) engineering in Tianqiao District as an example, medium-enthalpy and low-enthalpy geothermal energy is combined with the technology of aquifer thermal energy storage (ATES), providing cold energy in summer and warm energy in winter for the buildings. On the base of analysis of hydrogeological conditions in Tianqiao District, the temperature field of energy storage aquifers is numerically analyzed in the period of heating and cooling. The results show that the energy storage well can meet the requirement of heating and cooling conditions. The system of WSHP greatly utilizes medium-enthalpy and low-enthalpy geothermal energy, making the running costs economical.

scholarly journals Performance Evaluation of an Active PCM Thermal Energy Storage System for Space Cooling in Residential Buildings

2019 ◽  
Vol 23 (2) ◽  
pp. 74-89
Author(s):  
Sandris Rucevskis ◽  
Pavel Akishin ◽  
Aleksandrs Korjakins
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Cold Water ◽  
Residential Buildings ◽  
Pipe System ◽  
Space Cooling ◽  
Change Material

Abstract This paper presents a numerical simulation-based study that evaluates the potential of an active phase change material (PCM) incorporated thermal energy storage (TES) system for space cooling in residential buildings. In the proposed concept, TES system is composed of stand-alone PCM storage units which are installed between the concrete ceiling slab and the ceiling finishing layer. Active control of the thermal energy storage is achieved by night cooling of a phase change material by means of cold water flowing within a capillary pipe system. Effectiveness of the system under the typical summer conditions of the Baltic States is analysed by using computational fluid dynamics (CFD) software Ansys Fluent. Results showed that installation of the active TES system has a positive effect on thermal comfort, reducing the average indoor air temperature by 6.8 °C. The outcome of this investigation would be helpful in selecting the key characteristics of the system in order to achieve the optimum performance of an active TES system for space cooling of buildings in similar climates.

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