Different Operational Alternatives of Aquifer Thermal Energy Storage System for Cooling and Heating of a Residential Complex under Various Climatic Conditions of Iran

Ghaebi, Hadi; Bahadori, Mehdi N.; Saidi, M. H.

doi:10.24200/sci.2018.20323

Cited by 4 publications

(4 citation statements)

References 27 publications

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“…In the study area considered for this article (Babylon and Karbala regions in the middle of Iraq), it is expected that Aquifer Thermal Energy Storage (ATES) systems will be used in the future rather than conventional Heating Ventilation Air Conditioning systems. This expectation is consistent with the Middle East and North Africa (MENA) orientation to expand the use of renewable energy instead of fossil fuel [79][80][81][82][83]. Feasibility studies of ATES systems should be conducted prior to installation.…”

Section: Introductionsupporting

confidence: 64%

Seepage Velocity: Large Scale Mapping and the Evaluation of Two Different Aquifer Conditions (Silty Clayey and Sandy)

et al. 2020

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Seepage velocity is a very important criterion in infrastructure construction. The planning of numerous large infrastructure projects requires the mapping of seepage velocity at a large scale. To date, however, no reliable approach exists to determine seepage velocity at such a scale. This paper presents a tool within ArcMap/Geographic Information System (GIS) software that can be used to map the seepage velocity at a large scale. The resultant maps include both direction and magnitude mapping of the seepage velocity. To verify the GIS tool, this study considered two types of aquifer conditions in two regions in Iraq: silty clayey (Babylon province) and sandy (Dibdibba in Karbala province). The results indicate that, for Babylon province, the groundwater flows from the northwest to southeast with a seepage velocity no more than 0.19 m/d; for the Dibdibba region, the groundwater flows from the west to the east with a seepage velocity not exceeding 0.27 m/d. The effectiveness of the presented tool in depicting the seepage velocity was thus demonstrated. The accuracy of the resultant maps depends on the resolution of the four essential maps (groundwater elevation head, effective porosity, saturated thickness, and transmissivity) and locations of wells that are used to collect the data.

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Section: Introductionsupporting

confidence: 64%

Seepage Velocity: Large Scale Mapping and the Evaluation of Two Different Aquifer Conditions (Silty Clayey and Sandy)

et al. 2020

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“…The COP of the ATES system operation in this study is about two lower than that of the ATES system coupled with a chiller for cooling operation in Ghaebi et al [21]. The pre-cooling/pre-heating operations considered in this study have a similar SEER compared to the work of Vanhoudt et al [22], Picone et al [24].…”

Section: Daytime Processing Heat and Total Power Consumptionmentioning

confidence: 48%

“…Ghaebi et al [21] used a simulation to study an energy-saving operation method for an air-conditioning system that combines an ATES system and solar heat for an apartment house. Vanhoudt et al [22], Paksoy et al [23] compared the ATES system with the existing air conditioning system for hospitals using experiments and simulations.…”

Section: Introductionmentioning

confidence: 99%

Examination of Efficient Operation Method of ATES System by Comparison Operation with WTES System of Existent Heat Storage System

Sumiyoshi

Nishioka

et al. 2021

Applied Sciences

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Aquifer thermal energy storage (ATES) system is widely used mainly in Europe and USA. In this paper, we examined the efficient operation method of ATES by comparing it with the water thermal energy storage (WTES) system of an existent thermal energy storage (TES) system using simulation. This study uses three aquifers: pumping wells, thermal storage wells, and reducing wells. The initial temperature is 19.1 °C groundwater from the surrounding area. ATES systems use the same operating methods as WTES systems to reduce heat storage efficiency and increase energy consumption. The operation that combines the ATES system with the pre-cooling/pre-heating coil can be used for air conditioning operation even if the heat storage diffuses or the pumping temperature changes. The aquifer heat storage system was used for the pre-cooling/pre-heating coil, and the cooling power consumption was reduced by 20%. The heating operation could not maintain heat for a long time due to the influence of groundwater flowing in from the surroundings. Therefore, it is recommended to use the stored heat as soon as possible. When energy saving is important by introducing a pre-cooling/pre-heating coil, the operation is performed by storing heat at a low temperature close to geothermal heat and also using groundwater heat. In addition, if the reduction of peak power in the daytime is important, it is appropriate to operate so that the heat stored in the pre-cooling/pre-heating coil is used up as much as possible. As a result, it was found that it is effective to operate the ATES system in combination with a pre-cooling/pre-heating coil. In cooling operation, ATES-C1-7 was the lowest at coefficient of performance (COP) 2.4 and ATES-C2-14 was the highest at COP 3.7. In heating operation, ATES-H1-45 was the lowest at COP1.2, and in other cases, it was about the same at COP2.4-2.8. In terms of energy efficiency, the heating operation ATES-H1-45 had a low energy efficiency of 4.1 for energy efficiency ratio (EER) and 3.9 for seasonal energy efficiency ratio (SEER). In other cases, the energy efficiency was 8.2–12.4 for EER and 8.7–15.3 for SEER.

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“…The thermo-mechanical behavior of clays has been studied vastly by a number of researchers due to the utilization of thermal technology such as energy piles, energy conservation, hazardous wastes disposal and recovery systems in soils and rocks in many countries besides the aquifer thermal energy storage (ATES) systems in Iran [1]. Due to the importance of clay behavior at elevated temperatures, there are a number of experimental studies on the behavior of clays at the range of 20°C to 100°C.…”

mentioning

confidence: 99%

Shear Strength Characteristics of a Thermally Cured Sand-Bentonite Mixture

2021

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An experimental program was conducted to investigate the effects of curing time and curing temperature on shear behavior of a sand-bentonite mixture. The specimens were cured at temperatures of 40°C, 60°C and 80°C for 1, 3 and 5 days under 100kPa, 500kPa and 1000kPa confinements. The results of consolidated undrained triaxial shear tests showed that an increase in temperature from 40°C to 80°C at 1, 3 and 5 days of curing increased the shear strength by 25%, 24% and 23%, respectively. Also, the increase in curing time from 1 to 3 and from 1 to 5 days at 80°C increased the shear strength of samples 12% and 24%, respectively. The failure of pre-cured samples occurred in lower strains as a result of more induced brittleness.Moreover, the secant modulus as well as the size of yield loci and critical state line's slope increased by pre-curing. The application of thermal cycles resulted in increasing shear strength and experiencing a negative pore water pressure which shows a transition towards the quasistructured behavior. The results of scanning electron microscopy (SEM) studies confirmed the increase in void ratio during thermal curing.

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Different Operational Alternatives of Aquifer Thermal Energy Storage System for Cooling and Heating of a Residential Complex under Various Climatic Conditions of Iran

Cited by 4 publications

References 27 publications

Seepage Velocity: Large Scale Mapping and the Evaluation of Two Different Aquifer Conditions (Silty Clayey and Sandy)

Seepage Velocity: Large Scale Mapping and the Evaluation of Two Different Aquifer Conditions (Silty Clayey and Sandy)

Examination of Efficient Operation Method of ATES System by Comparison Operation with WTES System of Existent Heat Storage System

Shear Strength Characteristics of a Thermally Cured Sand-Bentonite Mixture

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