Life cycle environmental and cost evaluation of heating and hot water supply in social housing nZEBs

SUSTAINABLE BUILT ENVIRONMENT D-A-CH CONFERENCE 2019

生态环境科学

Hernandez, P.^1 ; Hernandez, J.^1 ; Urra, I.^1 ; Grisalena, D.^2

TECNALIA Research and Innovation, Astondo Bidea Edificio 700, Derio

48160, Spain^1

VISESA, Basque Country Public Housing Body, Portal de Gamarra 1A, Vitoria-Gasteiz

01013, Spain^2

关键词: Comparative analysis;    Economic evaluations;    Environmental and economic impacts;    Heat-pump technology;    Life cycle analysis;    Life cycle costing;    Life cycle perspectives;    Overall efficiency;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/323/1/012162/pdf
DOI  :  10.1088/1755-1315/323/1/012162

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This paper presents a comparative analysis of different space heating and hot water systems for a social housing project in Santurtzi, Spain. The building, comprising 32 apartment units and currently under construction, has been designed to minimize thermal energy demand, while ensuring comfort and quality of the internal environment for the social housing occupiers. The selection of the heating and hot water energy systems has been carried considering a life cycle perspective both for environmental and economic impacts. Different alternatives have been analysed which compare conventional gas boiler installation, which has been the norm for this type of social housing for the last decades, with various options based on heat pump technology. Life cycle analysis of the environmental effects of electrification of the thermal energy demand through heat pumps show a potential for reducing life cycle CO2 emissions. The economic evaluation done through life cycle costing, comparing investment, maintenance, replacement and operational costs of gas boiler with aerothermal and geothermal heat pump solutions, have shown however that gas heating solutions are still the most competitive economically. Increasing the overall efficiency of those heating and hot water systems that include heat pump technology, while reducing their uncertainty in operation is a key element to ensure competitiveness of heat pumps in the current market.