Efficiency of free cooling using latent heat storage integrated into the ventilation system of a low energy building
Arkar, Ciril (Author), Vidrih, Boris (Author), Medved, Sašo (Author)

URLURL - Presentation file, Visit http://dx.doi.org/10.1016/j.ijrefrig.2006.03.009 This link opens in a new window

This article presents the results of an investigation into the free cooling efficiency in a heavyweight and lightweight low energy building using a mechanical ventilation system with two latent heat thermal energy storages (LHTESs), one for cooling the fresh supply air and the other for cooling the re-circulated indoor air. Both LHTESs contain sphere encapsulated PCM (paraffin RT20). Using a developed and experimentally verified numerical modelof the LHTES, the temperature response functions, based on the heat storage size, the air flow rates and the PCMćs thermal properties, are established in the form of a Fourier series and empirical equations and used in the TRNSYS building thermal response model. Several mechanical ventilation,night cooling and free cooling operation modes were analysed and compared. It was found that the free cooling technique enables a reduction in the size of the mechanical ventilation system, provides more favourable temperatures and therefore enables better thermal comfort conditions, and in our studied case also fresh air for the occupants.

Keywords:prezračevanje, prihranki energije, učinkovitost, hlajenje, klimatizacija zgradb, shranjevanje energije, materiali, fazne premene, optimiranje, air conditioning, building, energy saving, efficiency, free cooling, ventilation, energy storage, phase change, optimization, materials
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Number of pages:str. 134-143
Numbering:Vol. 30, issue 1
ISSN on article:0140-7007
DOI:10.1016/j.ijrefrig.2006.03.009 Link is opened in a new window
COBISS.SI-ID:9805339 Link is opened in a new window
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Record is a part of a journal

Title:International journal of refrigeration
Shortened title:Int. j. refrig.
Publisher:Elsevier Science
COBISS.SI-ID:9140997 This link opens in a new window

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