The present work shows a method to produce techno-economic maps that represent the feasibility of double-U closed-loop shallow geothermal systems for different case studies in Europe and the potential savings that could be introduced by newly developed Cheap-GSHPs (CHeap and Efficient APplication of reliable Ground Source Heat exchangers and Pumps) technologies. First an empirical method for creating techno-economic maps related to closed-loop geothermal systems was conceived. The method started with the collection of data at European level. In particular, data from other tasks of the project were collected and homogenized in order to provide an overview of geological, climatic and energetic conditions across Europe. Other economic information retrieved by the partners of the consortium was used as reference basis for costs calculation. The collected data was the basis for the execution of a large amount of numerical simulations that correlate ground surface temperature (GST), thermal conductivity (?) and required BHE length for given energy demands (17 referential building types). Regression algorithms between mappable parameters (GST, ? required BHE-length) for each reference building type were developed. Maps of required BHE-length were developed as a starting point to calculate a specific capital cost index, EUR/kW of installed capacity. A first set of numerical simulations was performed for double-U heat exchangers whilst a second set was performed for a large coaxial probe developed by Cheap-GSHPs, in order to compare the economic improvements on a spatial basis. Seven case studies across Europe were considered for the application of the regressions, to test their reliability for different geologies, climates and data availability. The deployment of the new drilling and HE technologies coming from Cheap-GSHPs seems to be very positive in terms of EUR/kW savings, with savings that frequently range from 8 to 20%, depending on country. The Projects takes in account also historical buildings.
Economic, geological and technical potential mapping test for GSHP systems in Europe
Bernardi A
2019
Abstract
The present work shows a method to produce techno-economic maps that represent the feasibility of double-U closed-loop shallow geothermal systems for different case studies in Europe and the potential savings that could be introduced by newly developed Cheap-GSHPs (CHeap and Efficient APplication of reliable Ground Source Heat exchangers and Pumps) technologies. First an empirical method for creating techno-economic maps related to closed-loop geothermal systems was conceived. The method started with the collection of data at European level. In particular, data from other tasks of the project were collected and homogenized in order to provide an overview of geological, climatic and energetic conditions across Europe. Other economic information retrieved by the partners of the consortium was used as reference basis for costs calculation. The collected data was the basis for the execution of a large amount of numerical simulations that correlate ground surface temperature (GST), thermal conductivity (?) and required BHE length for given energy demands (17 referential building types). Regression algorithms between mappable parameters (GST, ? required BHE-length) for each reference building type were developed. Maps of required BHE-length were developed as a starting point to calculate a specific capital cost index, EUR/kW of installed capacity. A first set of numerical simulations was performed for double-U heat exchangers whilst a second set was performed for a large coaxial probe developed by Cheap-GSHPs, in order to compare the economic improvements on a spatial basis. Seven case studies across Europe were considered for the application of the regressions, to test their reliability for different geologies, climates and data availability. The deployment of the new drilling and HE technologies coming from Cheap-GSHPs seems to be very positive in terms of EUR/kW savings, with savings that frequently range from 8 to 20%, depending on country. The Projects takes in account also historical buildings.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
