Cost-optimization model to design and operate hybrid heating systems – Case study of district heating system with decentralized heat pumps in Finland

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Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2023-10-15

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Mcode

Degree programme

Language

en

Pages

16

Series

Energy, Volume 281

Abstract

This paper introduces a novel optimization approach to design and operate hybrid heating system, which integrates existing centralized district heating assets and decentralized heat pumps. Hybrid heating system enables sector coupling, where electrified heating assets can provide ancillary services for the power market. A modelling tool to study the impact on total heat delivery costs of adding heat pumps into existing district heating based heating system was developed. The case study modelling results show that decentralized assets can support a primary side of district heating network and optimal use of heating assets decreases average operating expenditure by 24%. In order to capture the full value of hybrid heating system, one needs to be able to utilize heat pumps to provide ancillary services in power market and receive compensation for feeding heat pump heat into the district heating network. The modelling results are sensitive to various parameters. Hence, a thorough sensitivity analysis is presented for the results.

Description

Funding Information: Decentralized electrification means utilizing small- and medium scale electricity-driven heat production technologies in secondary side of district heating network, i.e. in buildings. These can be e.g. air-to-air heat pumps, air-to-water heat pumps, ground-source heat pumps, water source heat pumps, exhaust air heat pumps, and electrical resistance heaters. Decentralized heat production capacity is designed and operated to optimize individual building's (or other heat sink's) energy economics. Decentralized capacity can, however, support also primary side of DH network, if the use of decentralized assets is predictable. Publisher Copyright: © 2023 The Author

Keywords

Cost optimization, District heating, Electrification, Heat pump, Hybrid energy system modelling

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Citation

Pesola, A 2023, ' Cost-optimization model to design and operate hybrid heating systems – Case study of district heating system with decentralized heat pumps in Finland ', Energy, vol. 281, 128241 . https://doi.org/10.1016/j.energy.2023.128241