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Energies 2017, 10(12), 1958; doi:10.3390/en10121958

Study and Optimization of Design Parameters in Water Loop Heat Pump Systems for Office Buildings in the Iberian Peninsula

Polytechnic School of Engineering, University of Oviedo, C/Wifredo Ricart s/n, 33204 Gijón, Spain
This paper is an extended version of our paper published in:” Fernández, F.J.; Folgueras, M.B.; Suárez, I. Energy study in water loop heat pump systems for office buildings in the Iberian Peninsula. Energy Procedia 2017, 136, 91–96, also presented at the 4th International Conference on Energy and Environmental Research (ICEER2017).
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Received: 24 October 2017 / Revised: 8 November 2017 / Accepted: 20 November 2017 / Published: 24 November 2017
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Abstract

Water loop heat pump (WLHP) air conditioning systems use heat pumps connected to a common water circuit to fulfill the energy demands of different thermal zones in a building. In this study, the energy consumption was analyzed for the air conditioning of an office building in the typical climate of four important cities of the Iberian Peninsula. The energy consumption of one water loop heat pump system was compared with a conventional water system. Two design parameters, the range in the control temperatures and the water loop thermal storage size, were tested. Energy redistribution is an important advantage of the WLHP system, but significant savings came from high efficiency parameters in the heat pumps and minor air flow rates in the cooling tower. The low thermal level in the water loop makes this technology appropriate to combine with renewable sources. Using natural gas as the thermal energy source, a mean decrease in CO2 emissions of 8.1% was reached. Simulations showed that the installation of big thermal storage tanks generated small energy savings. Besides, the total annual consumption in buildings with high internal loads can be reduced by keeping the water loop as cool as possible. View Full-Text
Keywords: water loop heat pump; heating ventilating and air conditioning; office building energy consumption water loop heat pump; heating ventilating and air conditioning; office building energy consumption
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Fernández, F.J.; Folgueras, M.B.; Suárez, I. Study and Optimization of Design Parameters in Water Loop Heat Pump Systems for Office Buildings in the Iberian Peninsula. Energies 2017, 10, 1958.

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