Energy and economic analysis of a building enclosure outfitted with a phase change material board (PCMB)

• Published in: Energy conversion and management 2014-07, Vol.83, p.73-78
• Main Authors: Sun, Xiaoqin, Zhang, Quan, Medina, Mario A., Lee, Kyoung Ok
• Format: Article
• Language: English
• Subjects: Applied sciences; Boards; Building enclosures; Building energy savings; Climate; Construction; Construction costs; Construction materials; Cooling; Enclosure; Energy; Energy savings ratio (ESR); Energy. Thermal use of fuels; Exact sciences and technology; Outdoor; Phase change materials (PCMs); Phase transition temperature; Simple payback period (SPP); Transport and storage of energy
• ISSN: 0196-8904; 1879-2227
• DOI: 10.1016/j.enconman.2014.03.035

•Phase change material boards (PCMBs) were simulated in building enclosures.•Energy and economic savings for these buildings were estimated.•The buildings were located in five cities with different climatic conditions.•The energy savings ratio was 100% when a cold energy source was used.•A mean electricity savings ratio of 13.1% was obtained. This paper presents energy and economic analyses related to the application of phase change materials boards (PCMBs) in building enclosures during the cooling season. A heat transfer model was developed, which was implemented via a computer program. Simulations were carried out using weather data files from five cities located in five different climate regions in China. Energy savings from using a natural cold source (e.g., outdoor air) and electricity savings from a reduction in electricity by air conditioning systems were evaluated. The energy savings ratio (ESR) and simple payback period (SPP) were used to assess the application of PCMBs in building enclosures. The selection of optimum phase transition temperatures for the PCMs for the various climates was made using indoor and outdoor air temperatures, as well as SPP. For space cooling purposes, it was suggested that phase transition temperatures should be at least 3°C higher than the mean outdoor air temperature. Simple payback period suggested the possibility of the cost effective use of PCMBs in occupied buildings for moderate temperature climates.