Novel ventilation cooling system for reducing air conditioning in buildings.: Part I: testing and theoretical modelling |
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| Affiliation: | 1. Department of Civil Engineering, Thomas Manns Vej 23, 9220 Aalborg Ø, Denmark;2. A.C. Meyers Vænge 15, 2450 København SV, Denmark;1. Graduate School of the Environment and Energy, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. Graduate School of Petroleum Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran;1. University of Ljubljana, Faculty of Mechanical Engineering, Aškerčeva 6, 1000 Ljubljana, Slovenia;2. École nationale des travaux publics de l''État (ENTPE), 3 Rue Maurice Audin, 69120 Vaulx-en-Velin, France;3. University of Ljubljana, Faculty of Civil and Geodetic Engineering, Jamova 2, 1000 Ljubljana, Slovenia |
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| Abstract: | A latent heat storage unit incorporating heat pipes embedded in phase change material (PCM) is developed and tested for a novel application in low energy cooling of buildings. A one-dimensional mathematical model of the heat transfer from air to PCM is presented to allow sizing of a test unit. Details of the construction and testing of one heat pipe/PCM unit in a controlled environment are described, and measurements of heat transfer rate and melting times are presented. When the difference between air and PCM temperature was 5°C, the heat transfer rate was approximately 40 W over a melt period of 19 h. The heat transfer rate could be improved, and the phase change time shortened, with an alternative design for finning of the heat pipe inside the PCM. |
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