Feasibility study of a PCM storage tank integrated heating system for outdoor swimming pools during the winter season

Abstract This feasibility study explores a heating system for outdoor swimming pools with applications for winter in subtropical weather conditions. The proposed heating system integrates air-source heat pumps, a PCM storage tank, and a thermal insulation cover; the novelty is that the storage tank is used to completely shift electrical demand from on-peak to off-peak periods, making outdoor swimming pools economically viable during the winter season. The configuration, operation, and control of the heating system are illustrated in detail. Its technical and economic feasibility is analyzed from the aspects of control performance, energy performance, thermal comfort, and economic performance by comparing it with a traditional heating system that uses electrical boilers for its heat supply. Case studies show that the proposed heating system can reduce operating costs significantly, suggesting its potential for application to outdoor swimming pools in subtropical climates during the winter.

[1]  M. Farid,et al.  Analysis of implementing phase change materials in open-air swimming pools , 2012 .

[2]  Guiyin Fang,et al.  Dynamic performances of solar heat storage system with packed bed using myristic acid as phase change material , 2011 .

[3]  Rafal Damian Figaj,et al.  Dynamic simulation and thermo-economic analysis of a PhotoVoltaic/Thermal collector heating system for an indoor-outdoor swimming pool , 2015 .

[4]  Frank P. Incropera,et al.  Fundamentals of Heat and Mass Transfer , 1981 .

[5]  A. Mousia,et al.  Energy performance of open air swimming pools in Greece , 2015 .

[6]  Mark Modera,et al.  Swimming pools as heat sinks for air conditioners: California feasibility analysis , 2013 .

[7]  Mark Modera,et al.  Swimming pools as heat sinks for air conditioners: Model design and experimental validation for natural thermal behavior of the pool , 2011 .

[8]  Wen-Shing Lee,et al.  Optimization of heat pump system in indoor swimming pool using particle swarm algorithm , 2008 .

[9]  Luca A. Tagliafico,et al.  An approach to energy saving assessment of solar assisted heat pumps for swimming pool water heating , 2012 .

[10]  Rahman Saidur,et al.  Numerical and experimental investigation of heat transfer in a shell and tube thermal energy storage system , 2014 .

[11]  Pedro J. Martínez,et al.  Analysis of an open-air swimming pool solar heating system by using an experimentally validated TRNSYS model , 2010 .

[12]  Atsushi Kanzawa,et al.  Enhancement of charging and discharging rates in a latent heat storage system by use of PCM with different melting temperatures , 1993 .

[13]  J.L.A. Francey,et al.  Low-cost solar heating of community pools using pool covers , 1980 .

[14]  Anil Kumar Tiwari,et al.  Feasibility of earth heat storage for all weather conditioning of open swimming pool water , 2013 .

[15]  M. A. Ezan,et al.  Experimental and numerical investigation of natural convection in a double skin facade , 2016 .

[16]  Joseph C. Lam,et al.  Life cycle energy cost analysis of heat pump application for hotel swimming pools , 2001 .

[17]  P. Eames,et al.  Thermal energy storage for low and medium temperature applications using phase change materials – A review , 2016 .

[18]  Alistair B. Sproul,et al.  Performance characterisation and energy savings of uncovered swimming pool solar collectors under reduced flow rate conditions , 2012 .

[19]  Mario A. Medina,et al.  Numerical analysis for the optimal location of a thin PCM layer in frame walls , 2016 .

[20]  J. C. Lam,et al.  Energy-saving Supporting Tourism Sustainability: A Case Study of Hotel Swimming Pool Heat Pump , 2003 .

[21]  Renato Lazzarin,et al.  Comparison of heat recovery systems in public indoor swimming pools , 1996 .

[22]  Dimitris Al. Katsaprakakis.  Comparison of swimming pools alternative passive and active heating systems based on renewable energy sources in Southern Europe , 2015 .

[23]  Constantine D. Rakopoulos,et al.  A model of the energy fluxes in a solar heated swimming pool and its experimental validation , 1987 .

[24]  Chiheb Bouden,et al.  Dynamic simulation of an integrated solar-driven ejector based air conditioning system with PCM cold storage , 2017 .

[25]  Hongwei Wu,et al.  A Two-dimensional Analytical Model for Prediction of the Radiation Heat Transfer in Open-cell Metal Foams , 2016 .

[26]  S. A. Sherif,et al.  Performance analysis of a solar-assisted swimming pool heating system , 1992 .