A Thermal Energy Storage Model for a Confined Aquifer

1988 ◽  
pp. 337-342 ◽  
Author(s):  
Yuqun Xue ◽  
Chunhong Xie ◽  
Qingien Li
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Confined Aquifer ◽  
Storage Model

A thermal energy storage process with controlled input

1982 ◽  
Vol 14 (02) ◽  
pp. 257-271 ◽  
Author(s):  
D. J. Daley ◽  
J. Haslett
Keyword(s):  
Stochastic Process ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Queueing Theory ◽  
Random Variable ◽  
Stationary Sequence ◽  
Storage Process ◽  
Storage Model ◽  
Special Cases

The stochastic process {Xn } satisfying Xn +1 = max{Yn +1 + αβ Xn , βXn } where {Yn } is a stationary sequence of non-negative random variables and , 0<β <1, can be regarded as a simple thermal energy storage model with controlled input. Attention is mostly confined to the study of μ = EX where the random variable X has the stationary distribution for {Xn }. Even for special cases such as i.i.d. Yn or α = 0, little explicit information appears to be available on the distribution of X or μ . Accordingly, bounding techniques that have been exploited in queueing theory are used to study μ . The various bounds are illustrated numerically in a range of special cases.

Cooling of Gas Turbines Inlet Air Through Aquifer Thermal Energy Storage

2006 ◽  
Author(s):  
Mehdi N. Bahadori ◽  
Farhad Behafarid
Keyword(s):  
Energy Storage ◽  
Gas Turbine ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Power Output ◽  
Gas Turbines ◽  
Confined Aquifer ◽  
Viable Option ◽  
Aquifer Thermal Energy Storage ◽  
The Mean

The power output of gas turbines reduces greatly with the increase of inlet air temperature. Aquifer thermal energy storage (ATES) is employed for cooling of the inlet air of a gas turbine. Water from a confined aquifer is cooled in winter, and is injected back into the aquifer. The stored chilled water is withdrawn in summer to cool the gas turbine inlet air. The heated water is then injected back into the aquifer. A 20 MW Hitachi gas turbine, along with a two-well aquifer were considered for analysis. It was shown that the minimum power output of the gas turbine on the warmest day of the year could be raised from 16.30 to 20.05 MW, and the mean annual power output could be increased from 19.1 to 20.1 MW, and the efficiency from 32.52% to 34.54% on the warmest day of the year and the mean annual efficiency from 33.88% to 34.52%. The use of ATES is a viable option for the increase of gas turbines power output, provided that suitable confined aquifers are available at their sites.

scholarly journals Development of a thermal energy storage model for EnergyPlus

2004 ◽  
Vol 36 (8) ◽  
pp. 807-814 ◽  
Author(s):  
Pyeongchan Ihm ◽  
Moncef Krarti ◽  
Gregor P. Henze
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Storage Model

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.

scholarly journals Thermal energy storage in a confined aquifer: Experimental results

1979 ◽  
Vol 15 (6) ◽  
pp. 1509-1514 ◽  
Author(s):  
F. J. Molz ◽  
A. D. Parr ◽  
P. F. Andersen ◽  
V. D. Lucido ◽  
J. C. Warman
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Experimental Results ◽  
Confined Aquifer

Transient Modeling of Seasonal Borehole Thermal Energy Storage System During Heat Energy Storing Process

2020 ◽  
Vol 28 (01) ◽  
pp. 2050005
Author(s):  
Seokhwa Hwang ◽  
Rin Yun ◽  
Jaehyeok Heo
Keyword(s):  
Energy Storage ◽  
Internal Energy ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Storage System ◽  
Energy System ◽  
Energy Storage System ◽  
Storage Model ◽  
Ground Temperatures ◽  
In Series

The borehole thermal energy system, KINTEX, located in Ilsan, South Korea was simulated using TRNSYS. The effect of the depth and spacing of the boreholes in this Borehole Thermal Energy Storage (BTES) system on the average stored energy and ground temperature were investigated over three years of its operation. Borehole thermal energy storage was simulated using the Duct Ground Heat Storage Model built in TRNSYS. The BTES system is composed of solar collectors, a heat exchanger, borehole thermal energy storage, and a thermal storage tank. The effects on the internal energy of the system were investigated by varying borehole depth and spacing while the volume and number of boreholes were kept constant. The total number of boreholes is 90 and all boreholes are connected in series. The borehole depths varied from 40 to 47.5[Formula: see text]m with steps of 2.5[Formula: see text]m, and the borehole spacing varied from 2.5 to 4.0[Formula: see text]m while the total volume of the BTES was maintained at 21,[Formula: see text]236 [Formula: see text]m3. The internal energy stored ranged from 1528.91 GJ to 1618.69 GJ over three years of calculations. With an increase of borehole depth and associated decrease of borehole spacing, the internal energy increased and ground temperatures approached 35∘C over a simulation period of three years.

scholarly journals A three-equation thermocline thermal energy storage model for bidisperse packed beds

Solar Energy ◽  
2019 ◽  
Vol 191 ◽  
pp. 410-419
Author(s):  
Christian Odenthal ◽  
Freerk Klasing ◽  
Thomas Bauer
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Packed Beds ◽  
Storage Model
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