Business and Socioeconomic Assessment of Introducing Heat Pumps with Heat Storage in Small-scale District Heating Systems

Ostergaard, P A and Jantzen, J and Marczinkowski, H M and Kristensen, M (2018) Business and Socioeconomic Assessment of Introducing Heat Pumps with Heat Storage in Small-scale District Heating Systems. In: Proc. 13th conf. on Sustainable Development of Energy, Water and Environment Systems, SDEWES 2018, Palermo, paper 149.

English | Text OstergaardJantzenMarczinkowskiKristensen18.pdf Download (1MB)

Abstract

Fossil fuel-based cogeneration of heat and power (CHP) plants has had a long-standing track-record in providing space heating and domestic hot water through district heating systems in Denmark. Small-scale district heating systems are progressively switching to biomass boiler-based due to decreasing spot market electricity costs, increasing fuel costs and worsening framework conditions for CHP plants. At the same time, however, biomass resources should be reserved for other purposes and analyses indicate that small-scale district heating systems should switch to heat pump-based heat production. In this paper, we investigate the transition of district heating systems on the Danish renewable energy island Samsø. While the heating system is already renewable energy-based through the use of a biomass boiler, the system is neither economically optimal nor optimal in terms of integrating fluctuating renewable energy sources. The analyses are conducted in two steps. In the first step through EnergyPLAN-based overall energy systems analyses of Samsø with heat pumps replacing district heating biomass boilers and investigating system impacts, the ability to integrate fluctuating renewables and overall systems costs. In the second step through analyses of optimal business economic design and operation of the district heating plant through analyses using the energyPRO model where plant operation is optimised against an external electricity market. Results show that while from a general systems perspective, heat pumps give a positive impact when factoring in the ability to exploit locally available fluctuating renewable energy sources and local biomass availability constraints, business economic analyses demonstrate a more uncertain feasibility of the potential switch and also demonstrate that added flexibility through extensive heat storage and overcapacity on heat pumps does not pay.

Item Type:	Conference or Workshop Item (Paper)
Creators:	Ostergaard, P A and Jantzen, J and Marczinkowski, H M and Kristensen, M
Projects:	SMILE
Date Deposited:	01 Nov 2018 19:46
Last Modified:	01 Nov 2018 19:46
URI:	http://arkiv.energiinstituttet.dk/id/eprint/639

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