Received: 30 August 2017 Revised: 28 November 2017 Accepted: 29 November 2017 DOI: 10.1002/er.3971 SPECIAL ISSUE PAPER Effect of encapsulated ice thermal storage system on cooling cost for a hypermarket Dogan Erdemir 1 Necdet Altuntop 1,2 1 Department of Mechanical Engineering, Erciyes University, Kayseri, 38039, Turkey 2 Energy Conversions Research and Application Center, Erciyes University, Kayseri 38039, Turkey Correspondence Dogan Erdemir, Department of Mechanical Engineering, Erciyes University, Kayseri 38039, Turkey. Email: erdemir@erciyes.edu.tr Funding information Scientific Research Division of Erciyes University, Grant/Award Number: FDK-2016-6316 Summary Hypermarkets have high cooling load, because of high heat gains from envi- ronment 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 hyper- market. 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 perfor- mance 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 cool- ing 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 pay- back 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. KEYWORDS ice thermal energy storage, ITES, off-peak cooling, peak load shifting 1 INTRODUCTION Ice thermal storage system (ITES) is a significant issue to reduce cooling cost in residential buildings. The basic working principle of ITES is 3 main periods. First, ice is produced at off-peak hours when electricity is cheaper (charging period). Then the produced ice is stored in a stor- age tank (storing period). Finally, the stored ice is used Int J Energy Res. 2018;1–11. wileyonlinelibrary.com/journal/er Copyright © 2018 Wiley Publishing Ltd. 1