Abstract
With the development of industries and changes in living standards of the society, demand for electricity is rapidly increasing. In order to maintain the demand supply balance and to provide uninterrupted supply, utilities have to meet electricity demand in the most economical way. Building new power plants is not always the most economical solution. The trend now, is towards reducing and controlling the demand through Demand Side Management (DSM) techniques which lead to almost always economical and environment-friendly solutions. In this paper, Heating, Ventilation and Air Conditioning (HVAC) system of Cinnamon Lakeside Hotel is analysed to identify the potential DSM options that can be implemented. Thermal Energy Storage (TES) was selected as the DSM option to store cooling load during off-peak hours of the day where electricity is fairly cheap and use it during peak and day hours when the electricity is expensive. Technical viability and potential saving that can be achieved through TES in hotel sector of Sri Lanka is further analysed.
Highlights
Thermal comfort is a main factor in modern day building designs
This paper presents techno-economic benefits of shifting air conditioning load from peak to off peak hours by using cold Thermal Energy Storage (TES) through a case study for a large-scale hotel
Vertical cylinder tanks are the most common shape of tanks used for Chilled Water Storage System (CWS) [4] and they can be located above ground, partially buried or completely buried depending on the location
Summary
Thermal comfort is a main factor in modern day building designs. Air conditioners are generally used to provide thermal comfort inside buildings. Use of air conditioning is increasing around the world, contributing to a substantial increase of demand for electricity. HVAC systems in industrial, commercial and residential buildings are the largest single contributor to electricity demand, especially during daytime [2]. Sri Lanka’s daily electricity demand curve shows a predominant evening peak which is served by expensive gas turbines operated on diesel oil [5]. All efforts must be taken to shift loads from the peak demand period and flatten the demand curve for better utilization of the capital investments
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