Comparison of environmental impacts of two residential heating systems |
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| Authors: | Lijun Yang Radu Zmeureanu Hugues Rivard |
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| Affiliation: | 1. Department of Building, Civil, and Environmental Engineering, Centre for Building Studies, Concordia University, Montréal, Qué., Canada H3G 1M8;2. Department of Construction Engineering, Canada Research Chair in Computer-Assisted Engineering for Sustainable Building Design, École de Technologie Supérieure, Montréal, Qué., Canada |
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| Abstract: | This paper presents a comparison of environmental impacts of two residential heating systems, a hot water heating (HWH) system with mechanical ventilation and a forced air heating (FAH) system. These two systems are designed for a house recently built near Montreal, Canada. The comparison is made with respect to the life-cycle energy use, the life-cycle greenhouse gas (GHG) emissions, the expanded cumulative exergy consumption (ECExC), the energy and exergy efficiencies, and the life-cycle cost. The results indicate that the heating systems cause marginal impacts compared with the entire house in the pre-operating phase. In the operating phase, on the other hand, they cause significant environmental impacts. The HWH systems with a heat recovery ventilator (HRV) using either electricity or natural gas have the lowest life-cycle energy use and lowest ECExC. The HWH and FAH systems using electricity as energy source have the lowest GHG emissions. Finally, the FAH systems have, on the average, a lower life-cycle cost than the HWH systems. |
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| Keywords: | Environmental impacts Heating systems Hot water heating Forced air heating House Life-cycle analysis Energy Exergy Emissions Cost |
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