Abstract
Waste heat from cooling circuits can be a useful source of energy for other applications, such as domestic hot water heaters. Furthermore, by removing waste heat from the cooling circuit, its effectiveness can theoretically be enhanced. A number of previous studies have shown that waste heat can be effectively harvested by installing a desuperheater in the cooling circuit between the condenser and compressor. More recently, studies have concentrated on applying heat pumps in conjunction with desuperheaters in low energy houses. In this study, we describe an experimental laboratory-scale cooling circuit with a serially connected desuperheater for heating domestic hot water. We were able to verify that installation of a desuperheater between the compressor and condenser significantly increased the energy efficiency ratio of the experimental cooling circuit, thereby confirming the hypothesis that simultaneous use of waste heat increases the efficiency of cooling circuits.
Highlights
Modern buildings often have problems with overheating due to large glazed surfaces and internal gains from people and equipment and it is usually necessary to cool these buildings [1]
The above-mentioned heat pump was designed for the preparation of Domestic Hot Water (DHW) and space heating
Studies have focussed on the use of desuperheaters in smaller-scale cooling circuits associated with DHW heating units [3], DHW cooling towers [4, 5] or solar-based systems for heating homes or swimming pools [6, 7]
Summary
Modern buildings often have problems with overheating due to large glazed surfaces and internal gains from people and equipment and it is usually necessary to cool these buildings [1]. Some studies have shown that the efficiency of cooling units can be enhanced by installing a desuperheater in the cooling circuit [2]. Studies have focussed on the use of desuperheaters in smaller-scale cooling circuits associated with DHW heating units [3], DHW cooling towers [4, 5] or solar-based systems for heating homes or swimming pools [6, 7]. In article [3] the authors deal with the use desuperheater for preparing DHW in zero net energy house. In Articles [4] and [5] authors compares the the effectiveness of the cooling circuit with desuperheater and reversibly used water cooling tower (RUWCT). The authors of article [6] dealing
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