Effect of encapsulated ice thermal storage system on cooling cost for a hypermarket

Abstract

Summary Hypermarkets have high cooling load, because of high heat gains from environment and high people circulation. So the cooling cost of hypermarkets is generally so high. Cooling cost can be reduced by cold thermal energy storage systems. The aim of the present study is to determine the effect of different ice thermal storage system (ITES) utilization strategies on cooling cost for a hypermarket. Hypermarket is located in Ankara, Turkey. Daily peak cooling load of the hypermarket is 8332 kWh. To decrease to cooling cost, encapsulated ITES has been integrated to the hypermarket air conditioning system. Ice thermal storage system utilization strategies have great impact on the economic performance of the system. So, in this study, the effect of different ice storage strategies on the cooling cost was investigated. Results presented in the term of saving amount and payback period. At the end of study, it was found that the cooling cost decreased with the increasing storage capacity. Also, to increase saving amount, the stored energy should be used in electricity peak hour as much as possible. Load leveling and partial storage for peak hours strategies have shown that how the stored energy is used has as great impact as storage capacity on the economic performance of ITES, because load leveling and partial storage for peak hours strategies have performed better performance in the terms of payback period and profit amount at the end of 10 years than ordinary partial storage strategies at the same storage capacity. The highest profit at the end of 10 years is 1 450 000 USD and seen in full storage strategy. The lowest profit at the end of 10 years is 185 000 USD and seen in 10% partial storage. Also, while the shortest payback period is seen in both load leveling and 10% partial storage strategies with about 1.5 years, the longest payback period is seen in full storage strategy with about 3.1 years.

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

“…These are storage capacity and how to use stored energy. This is called as ITES utilization strategy . ITES utilization strategy should be setup carefully.…”

“…This is called as ITES utilization strategy. 3 ITES utilization strategy should be setup carefully. Because, if the strategy is not carefully adjusted, the economic performance of ITES system will be reduced.…”

“…Han et al emphasized that electricity tariff had great impact on the economic effect of ITES integrated cooling system. Erdemir and Altuntop researched the effect of ITES utilization strategies on the economic performance of ITES system, used in a hypermarket. Using stored energy at peak tariff hours played significant role on the economic effect of the system.…”

Thermal performance assessment of a thermal energy storage tank: effect of aspect ratio and tilted angle

“…Latent heat thermal energy storage system (LHTES) has attracted considerable attention since it has many superiorities, including high thermal energy storage density, low cost, system robustness, and relatively constant temperature during heat charging and discharging 1‐3 . LHTES has shown great potential in a wide span of thermal applications, such as heat storage in buildings, 4‐6 concentrating solar power, 7‐9 solar energy storage, 10‐12 waste heat recovery, 13‐15 cooling of electronic devices, 16‐18 ice‐storage air‐conditioning, 19‐21 and liquid carbon dioxide energy storage system 22‐24 …”

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

“…This effect depends on storage capacity and how to use stored energy. Erdemir and Altuntop investigated the effect of the encapsulated ITES system on the cooling cost of hypermarket. They applied different ITES utilization strategies to the cooling system of hypermarket.…”