Paper Conference

Proceedings of eSim 2020: 11th Conference of IBPSA-Canada


Modeling and simulation of a dual temperature BTES system

Mohammadamin Ahmadfard, Michel Bernier
Polytechnique Montreal, Canada

Abstract: Mohammadamin Ahmadfard¹, Michel Bernier¹, Antoni Paleshi², Greg Allen³ ¹Polytechnique Montréal, Montréal, Canada ² WSP, Kitchener, Ontario, Canada ³ Rivercourt Engineering, Toronto, Canada emissions during peak electricity demand periods when The concept of a dual temperature borehole thermal energy storage (DT-BTES) system is presented in this paper. DTBTES consists of relatively warm boreholes positioned in an inner core and surrounded by colder boreholes on an outer ring. The differential temperature between these two sets of boreholes can be achieved using a heat pump that uses the outer ring as the source and the inner core as a sink. In the first part of the paper, the approach used to model borehole heat transfer in a DT-BTES is presented. Then, the DT-BTES model is used in two multi-annual simulation test cases. In the second test case, heat pumps operate overnight so that the inner core and the outer ring are sufficiently hot and cold for direct heating and cooling of a building during the daytime. These results show the potential of DT-BTES systems to displace electrical energy usage.