A PCM based cooling system for office buildings: a state of the art review

Abstract

Cooling of air in buildings has a significant effect on thermal comfort and, consequently, productivity of office occupants. This study presents a state of the art review of energy efficient cooling systems that will provide occupants in buildings with satisfying thermal comfort. Using high-temperature cooling systems combined with renewable energy sources increases the energy efficiency in buildings. Latent heat thermal energy storage (LHTES) using Phase Change Materials (PCM) is a renewable energy source implemented in space cooling applications due to its high energy storage density. Since the share of commercial buildings in need of cooling is increasing, there is a need for developing new technical solutions in order to reduce the energy use without compromising thermal comfort. To this end, a proposed ventilation system, preliminarily analyzed in this paper, is expected to reduce further the energy use. The ventilation system is composed of an air handling unit, a 2-pipe active chilled beam system, and a cooling system including a LHTES using PCM. Few researchers have investigated chilled water air-conditioning systems that integrate a LHTES using PCM. In this review, function characteristics, possibilities and limitations of existing systems are discussed.

Compatibility Tests between Three Commercially Available Organic PCMs and Metals Typically Used in Fin-and-Tube Heat Exchangers

“…In this study three commercial PCMs, RT15, RT18 HC, and RT22 HC, were investigated. These PCMs can be used to support heating or cooling systems in buildings and have low phase transition temperatures that fall within the range of 10 °C to 23 °C [ 20 , 21 , 22 , 23 , 24 ]. PCM samples of volume amounting to 10 mL were applied to glass tubes with a diameter of 16 mm and a length of 160 mm (except tube No.…”

Thermal Analysis of Organic and Nanoencapsulated Electrospun Phase Change Materials

“…Chemical and physical stability of organic PCMs makes them suitable for LHTES applications. Commercial PCMs for application in the temperature range 15-20 °C have been recently reviewed [13]. In the current study, four commercially available materials and their mixtures are investigated.…”

Análise Do Impacto De Materiais De Mudança De Fase No Conforto Térmico De Escola Pública Através De Simulação Computacional

“…No momento específico da mudança de fase, este material funciona como um armazenador de energia térmica por meio de calor latente, visto que não haverá mudança de temperatura ao longo dele, mas um aumento de sua entalpia. Os PCMs são divididos em 3 grandes grupos, de acordo com Paroutoglou et al (2019): orgânicos, inorgânicos e eutéticos. A aplicação do PCM na construção civil varia conforme tipo de encapsulamento do material, que pode ser macroencapsulado, como uma placa ou tubo, ou micro ou nanoencapsulado, onde o PCM é adicionado a outro material que faz parte da edificação, por meio de pulverização (MAGENDRAN et al, 2019).…”