COMPARATIVE ANALYSIS OF AIR-SOURCE AND GEOTHERMAL HEAT PUMPS FOR ASSET MANAGEMENT IN THE HVAC SYSTEM OF A CRITICAL ENVIRONMENT
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Abstract
The present work addresses the asset management in a critical environment — the Bioterium of the Faculty of Health Sciences (FCS) of the University of Beira Interior (UBI), Portugal — a facility where the environmental conditions must be uninterruptedly maintained at a temperature of 21 ºC, and with a relative humidity of 50%. The maintenance of such conditions requires the constant use of the Heating, Ventilation and Air Conditioning (HVAC) system, especially chillers and boilers for cooling and heating, respectively. Consequently, due to the significant weather variations throughout the year, a system failure may result in drastic consequences for the facility assets and for the ongoing activities as well.
Since, the chillers and boilers must be eventually replaced, the objective of this article is to carry out an analysis of possible alternatives for the replacement of such equipment, considering the economic and environmental aspects. For this reason, it is discussed here the Heat Pumps (HP) which operate according to the vapor compression cycle, as they are an equipment that satisfy both aspects by promoting both the cooling and heating of the environment in a more efficient and sustainable way. In this way, aerothermal and geothermal HP technologies and their intrinsic operational aspects are discussed. Finally, a simulation in Python of both equipment, for several scenarios of heating and cooling of the considered environment is performed, for a more detailed analysis of the subject.
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