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phase change material

Performance in practice of a ventilation system with thermal storage in a computer seminar room

Computer classrooms present challenges for cooling because internal heat gains higher than typical classrooms. Focused on thermal comfort, this paper presents the results of a field and computational study of a computer seminar room in west England. A mechanical ventilation system with phase change materials thermal storage has been installed in the room to provide thermal comfort and indoor air quality. Monitored data of internal air temperature, CO2 and humidity were analysed and compared with current requirements for indoor air quality and comfort.

Thermal performance of ventilated solar collector with energy storage containing phase change material

This paper presents a ventilated solar collector with energy storage of fins containing Phase Change Material (PCM) in the air cavity and investigates its thermal performance. The idea is to use PCM in combination with ventilation as a thermal controller of indoor environment and to consequently decrease the building energy consumption both in summer and winter time. The main parts of the solar collector are plate fins with small thickness containing PCM fitted into the ventilation cavity, which is a good way to compensate the low thermal conductivity of PCM.

SIMULATION OF A NOVEL HEAT PIPE/PCM SYSTEM FOR COOLING OF NATURALLY VENTILATED BUILDINGS

The paper describes the numerical simulation of a novel ventilation cooling system. The ultimate aimof the mathematical model is to facilitate the design of the system for specific buildings and climates.The model directly takes account of time dependency in that the diffusion equation for the heat flow inthe fabric of the room is solved. This approach means that important parameters (e.g. ventilationrates and internal heat gains) can be arbitrarily specified as functions of time.

Experimental Investigation of Thermal Behaviour of Phase Change Materials under Dynamical Thermal Effects

Because we spend most of our time in enclosed spaces, thermal comfort of buildings rose increasinglyand then energy consumption correspondingly is increased, aggravating the pollution of naturalenvironment. Integrating phase change materials (PCM) into building walls is a potential method ofreducing energy consumption in passively designed buildings. However, there is a strong need forexperimental data to evaluate the capacity of PCM to stabilize the internal environment when there areexternal temperature changes and solar radiations: that is the purpose of our article.