1876-6102 © 2016 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the organizing committee EENVIRO 2015 doi:10.1016/j.egypro.2015.12.221 Energy Procedia 85 (2016) 408 – 415 ScienceDirect Sustainable Solutions for Energy and Environment, EENVIRO - YRC 2015, 18-20 November 2015, Bucharest, Romania Thermo-Economic Analysis of an Air-to-Water Heat Pump Viorel Popa a , Ion Ion a , Camelia Lăcrămioara Popa a * a ”Dunărea de Jos” University of Galati, 47 Domneasca St., Galati 800008, Romania Abstract An air-to water heat pump was implemented in a school placed in rural area near Galati city. This facility was monitored for two years period. The implementation of the heat pump was considered because there is no heating or natural gas network in the village. This study presents an experimental thermo-economic analysis of this type of heat pump, using the results obtained in a cold period of the year. Using the registered values of thermo-electrical parameters by the controller, a medium value of the coefficient of performance of the heat pump was calculated. In the same time, a comparative economic analysis of the heat pump was performed © 2015 The Authors. Published by Elsevier Ltd. Peer-review under responsibility of the organizing committee EENVIRO 2015. Keywords: Air-to-water heat pump; thermo-economic analysis; greenhous gas emissions; coefficient of performance 1. Introduction Following the European commitment of 20% reducing of the greenhouse gas emissions and 20% increase of energy efficiency by 2020 [1], energy for residential space heating and domestic hot water has been identified as the possible targets. Heat pump systems are considered as renewable energy technology and they become more and more promising in both residential and commercial applications due to their high utilization efficiency compared to the conventional heating and cooling systems [2]. They are capable to use inexhaustible resources such as air source, geothermal source, waste heat and solar energy, are environmentally-friendly and provide high levels of comfort [2], [3], [4]. The drawback of air source heat pumps is the reduction in efficiency as the outdoor air become colder, resulting in lower heat supply in times when it is most needed. * Corresponding author. Tel.: +40721804500; fax: +40336314463. E-mail address: viorel.popa@ugal.ro. Available online at www.sciencedirect.com © 2016 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer-review under responsibility of the organizing committee EENVIRO 2015