Design of an ice thermal energy storage system for a building of hospitality operation

Wu, Chung-Tai; Tsai, Yao-Hsu

doi:10.1016/j.ijhm.2015.01.005

Cited by 19 publications

(7 citation statements)

References 23 publications

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“…Other simplified methods are available including the radiant time-series (RTS), the transfer function (TFM), the total equivalent temperature differential with time averaging (TETD/TA) and the cooling load temperature difference with cooling load factors (CLTD/CLF) methods. Previous research assessed the use of ITES estimating the building cooling load profile of commercial buildings with the CLTD/CLF method (Rismanchi et al, 2012), the TFM method (Wu & Yao-Hsu, 2015) and, simulation tools such as TRNSYS (Rismanchi et al, 2013) and Energy Plus (Sehar et al, 2012;Sehar et al, 2016;Yin et al, 2015).…”

Section: Commercial Buildings Cooling Load Profilesmentioning

confidence: 99%

“…Yin et al (2015) simulated ITES in office and retail buildings in California to assess its cost-effectiveness and demand response (DR) capabilities, and concluded that ITES can provide a reliable and fast load shed without interruption in the buildings occupants' comfort. Wu & Yao-Hsu (2015) concluded that the main driver for the uptake of ITES technology is economic. Sehar et al (2016) simulates a medium-sized office building with integrated solar PV, DR and ITES.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of ice thermal energy storage (ITES) for commercial buildings in cities in Brazil

Arcuri

Spataru

Barrett

2017

Sustainable Cities and Society

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High temperatures and the intensive use of air conditioning are considered the main drivers of the increase in Brazil's electricity demand in the summer, which has been causing major power cuts due to insufficient supply to meet peak demand. This paper analyses the techno-economic aspects of Ice Thermal Energy Storage (ITES) in Brazil, as a technology that can be used to shift building cooling load to off-peak time. ITES is assessed in five cities and five archetypes of commercial buildings, using two different operation strategies and two types of chillers, for new installations and retrofits. Results have shown that ITES can effectively shape peak demand in commercial buildings, generating economic gains for building owners but also losses in some cases. Although the climate plays an important role, the electricity tariffs vary significantly from city to city and this determined the economic feasibility of ITES. The technology's potential to shape demand in Brazil's commercial sector can encourage policy makers, regulators, grid operators and utilities in considering ITES as an option to reduce peak demand, increase security of supply and support the integration of intermittent renewable generation.

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Section: Commercial Buildings Cooling Load Profilesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of ice thermal energy storage (ITES) for commercial buildings in cities in Brazil

Arcuri

Spataru

Barrett

2017

Sustainable Cities and Society

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“…Sehar et al researched the effect of ITES for office buildings on electrical energy consumption. Wu and Tsai studied the design of an ITES system for a building of hospitality operation. They found that ITES system could decrease chiller capacity and cooling costs.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of using graded porosity on the thermal performance of the encapsulated ice thermal energy storage tank

Erdemir

Altuntop

2019

Energy Storage

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The storage tank has great impact on the performance of ice thermal energy storage (ITES) system. Previous researches show that enhanced temperature gradient in the tank improves the thermal performance of system. This study deals with the investigation for determining the effect of using graded porosity in the storage tank of encapsulated ITES system. In this study, it was researched that the effects of uniform, two‐graded, and three‐graded porosities inside the storage tank. Energy equation in porous medium was solved analytically to determine the centerline temperature changing in the tank. At the end of study, it was found that the lower porosity supplied higher thermal performance. However, lower porosity requires higher tank volume. Graded porosity provided the almost equal thermal performance with lower uniformly distributed porosity, although it had a higher porosity. Energy efficiency values were very high and changed between 95.23% and 99.98% in all porosity structure and working conditions. On the contrary to the energy efficiency values, exergy efficiency values were changed over a wider range between 35.80% and 88.71%. The highest exergy efficiency of 88% was seen in ε = 0.4 uniform porosity. Also, (ε1 = 0.4, ε2 = 0.5) two‐graded porosity and (ε1 = 0.4, ε2 = 0.5, ε3 = 0.6) three‐graded porosity provided higher exergy efficiency. While exergy efficiency increased with increasing heat transfer fluid (HTF) flow rate, decreased with decreasing HTF inlet temperature.

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“…They found that modified electricity tariff may increase the economic benefit from the ITES system by 25%. Wu et al researched ITES system usage in the seven‐story commercial building in Tapei, Taiwan. They determined that if the AC systems were not operated at peak hours with partial storage, they would save 45 000 USD per year.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of thermal performance of geometrically modified spherical ice capsules during the discharging period

Erdemir

2019

Int J Energy Res

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Summary Ice thermal energy storage (ITES) is a significant option for shifting cooling load from peak hours to off‐peak hours in order to reduce the cooling cost and equipment capacity. Encapsulated ITES system is one of the most preferred types of ITES systems, because it is easier to apply and has lower initial cost than other types of ITES systems. Capsule geometries have great impact on the thermal performance of the encapsulated ITES system. Spherical capsules are widely used in the application because they provide better thermal performance due to the ratio of its volume to its surface area. Also, modified capsule geometries are used for increasing the thermal performance of the ITES system. This paper focuses on a numerical study in order to determine the effect of the geometrically modified spherical capsule on the thermal performance during the discharging period. Seven geometrically modified spherical capsules were investigated and compared with the ordinary spherical capsule. The FLUENT 17.1 code was used for numerical analyses. At the end of the study, it was found that geometrically modified capsules provided higher thermal performance than an ordinary spherical capsule in the equal capsule volume. Capsule D provided the longest discharging period of 2118 seconds, when VHTF, in = 0.001 m/s and THTF,in = 275.5 K. The lowest discharging time of 464 seconds was obtained with Capsule A, when VHTF, in = 0.01 m/s and THTF, in = 283 K. Among the studied modified capsules, Capsule F performed the worst thermal performance. Energy efficiency values were high, and they did not give comparable difference between the capsule models and working conditions. While all exergy values were 98.50% and higher, exergy efficiency values changed between 85.12% and 51.91%. Exergetically, Capsule D provided the best thermal performance during the discharging period.

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Design of an ice thermal energy storage system for a building of hospitality operation

Cited by 19 publications

References 23 publications

Evaluation of ice thermal energy storage (ITES) for commercial buildings in cities in Brazil

Evaluation of ice thermal energy storage (ITES) for commercial buildings in cities in Brazil

Investigation of the effect of using graded porosity on the thermal performance of the encapsulated ice thermal energy storage tank

Numerical investigation of thermal performance of geometrically modified spherical ice capsules during the discharging period

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