Abstract
Air has an important role to play as a renewable resource to supply heat in urban areas. The implementation of heat pumps in multifamily buildings represents an important and underexploited development potential. Financial comparison of heating costs depending on building size and heat production technology shows how retrofit projects with air-to-water heat pumps compare to gas. Feedback from experience based on pilot projects presents the various challenges faced and proposes solutions.
Highlights
The energy transition to renewable resources is currently a priority in many countries
Financial comparison of heating costs depending on building size and heat production technology shows how retrofit projects with air-to-water heat pumps compare to gas
The ambient air has an important role to play as a renewable resource for sustainable heat production in urban areas
Summary
The energy transition to renewable resources is currently a priority in many countries. Air to water heat pumps (HP) are often the only achievable solution to supply renewable energy to the buildings for heating purposes when district heating does not cover the area. The ambient air has an important role to play as a renewable resource for sustainable heat production in urban areas. Current state in the canton of Geneva, Switzerland The thermal energy produced for heating and domestic hot water production in Switzerland is responsible for about 30% of the country’s CO2 emissions [1]. The built housing stock in the canton of Geneva accounts for about 44’000 residential buildings, 58% of which are single-family houses. Published under licence by IOP Publishing Ltd the canton of Geneva for heating purpose in buildings are split up as follows: 51% gas, 32% heating oil, 12% district heating and 5% of others. The heating costs computation takes into account the technology efficiency, initial investment (including annuity), maintenance, energy cost (without CO2 tax) and CO2 tax taken separately [4]
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