Comparative Study for Underfloor Heating System using Boiler or Heat Pump

Discussion Committee: 
Dr. Abdelrahim Abu Safa / Supervisor
Prof. Dr. Afeef Hasan / External Examiner
Dr. Mohammad Al-Sayed / Internal Examiner
Dr. Abdelrahim Abu Safa / Supervisor
Hussein Ishaq Hussein Awad
Energy savings are an important issue for both economy and environment. Domestic and residential buildings heating systems are known of their high energy consumption and high environmental effects. The main goal of this study is to compare between electrical heat pump and diesel boiler for feeding under floor heating loops. A case study of a typical residential apartment (78.3 m2) is selected to compare its heating energy requirement when using either an electrical heat pump or diesel boiler with under floor heating system at similar comfort quality conditions. The heating load is calculated for the apartment based on the variation of the ambient temperature in winter months –November, December, January and February - during two years (2011 - 2012), through meteorology data obtained from Palestinian Meteorological Department for Hebron City. An empirical coefficient of performance (COP) for the heat pump is used. The used equation takes in consideration both the heated water and ambient temperatures. The obtained monthly heating energy was also calculated using the degree day method (DDH) , moreover the expected seasonal diesel consumption was calculated using DDH method, and found to be similar to that calculated by heating load method. The maximum calculated heating load is 6.11 kW based on the average minimum ambient temperature of 7 oC, and the corresponding COP of the heat pump was 3.13. A simple economical analysis using the present worth value shows the superiority of the heat pump over the diesel boiler. The annual cost of the heat pump is about 2000 NIS while it is about 7000 NIS for the diesel boiler. These calculation was performed based on equal life time for both systems of 15 years. The environmental effects of both systems was compared based on the carbon dioxide emissions, the results show slight deference between both systems. Annually, 31.2 tons of CO2 emissions is expected from the heat pump while 33 tons of CO2 is expected from the diesel boiler, this could be due to the use of coal for electricity generation in the region.
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