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Techno-economic analysis of energy renovation measures for a district heated multi-family house
- Publication Year :
- 2016
- Publisher :
- KTH, Strömnings- och klimatteknik, 2016.
-
Abstract
- Renovation of existing buildings is important in the work towards increased energy efficiency and reduced environmental impact. The present paper treats energy renovation measures for a Swedish district heated multi-family house, evaluated through dynamic simulation. Insulation of roof and façade, better insulating windows and flow-reducing water taps, in combination with different HVAC systems for recovery of heat from exhaust air, were assessed in terms of life cycle cost, discounted payback period, primary energy consumption, CO₂ emissions and non-renewable energy consumption. The HVAC systems were based on the existing district heating substation and included mechanical ventilation with heat recovery and different configurations of exhaust air heat pump. Compared to a renovation without energy saving measures, the combination of new windows, insulation, flow-reducing taps and an exhaust air a heat pump gave up to 24% lower life cycle cost. Adding insulation on roof and façade, the primary energy consumption was reduced by up to 58%, CO₂ emissions up to 65% and non-renewable energy consumption up to 56%. Ventilation with heat recovery also reduced the environmental impact but was not economically profitable in the studied cases. With a margin perspective on electricity consumption, the environmental impact of installing heat pumps or air heat recovery in district heated houses is increased. Low-temperature heating improved the seasonal performance factor of the heat pump by up to 11% and reduced the environmental impact. QC 20160809
- Subjects :
- Engineering
Architectural engineering
Primary energy
020209 energy
02 engineering and technology
010501 environmental sciences
Management, Monitoring, Policy and Law
01 natural sciences
Energy engineering
heat pump
Waste heat
0202 electrical engineering, electronic engineering, information engineering
Environmental impact assessment
Environmental Analysis and Construction Information Technology
Energy Systems
0105 earth and related environmental sciences
Energisystem
business.industry
Mechanical Engineering
primary energy
LCC
Building and Construction
Miljöanalys och bygginformationsteknik
Energy technology
low-temperature heating
Energy conservation
General Energy
Work (electrical)
District heating
business
air heat recovery
Efficient energy use
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....eca2c898360a406b7c74fcac7546c329