Abstract

Phase change materials (PCMs) have been considered for thermal storage in buildings since before 1980. Most of the work included in this chapter investigate the importance of thermal energy storage in buildings, with specific objectives of energy saving and improving comfort. Throughout this chapter, experimental work has been based on climatic conditions for Auckland City in New Zealand, but the computer simulation work allowed conclusions to be drawn for other cities with different climate. Farid et al. examined the impact of using PCMs in building on electricity demand-side management perspective with real case studies, which incorporate wholesale electricity market data of New Zealand. The use of higher melting point PCM with the underfloor heating system allowed significant peak load shifting, while using lower melting point PCM in the walls and ceiling provided the comfort needed in the building. An appropriate design enabled significant energy savings, up to 33%, and comfort enhancement of up to 31%.

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