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Decarbonising heating and hot water using solar thermal collectors coupled with thermal storage: The scale of the challenge

Decarbonising heating and hot water using solar thermal collectors coupled with thermal storage: The scale of the challenge
Decarbonising heating and hot water using solar thermal collectors coupled with thermal storage: The scale of the challenge
This paper explores the feasibility of using renewable solar thermal energy linked to a salt hydrate thermochemical store (reversible chemical reaction involving the addition / removal of water from a salt) to provide a zero-carbon heating and hot water option for an average UK home. Volumetric absorption based on diluted colloidal suspensions or nanofluids containing wavelength tuneable plasmonic silver nanoparticles are a possible means for enhancing solar thermal capture. To make full use of this captured energy, it requires inter-seasonal storage in a suitable energy dense, high efficiency thermal store. As such even the potentially highest energy density obtainable for a salt hydrate thermochemical store would still need a store of greater than 35 m3 (10 MWh) to nearly meet current winter heating and hot water demands (with 1 discharge cycle per annum). With a possible increase in collector efficiency to over 70% such a system would collect enough solar energy annually to become viable for homes with a greater than average (>15 m2) roof area, a lower than median consumption (<12,000 kWhyr-1) and enough space for a large thermochemical store (≤46 m3). This paper concludes by detailing the significant additional research efforts required to bring this possible decarbonising solution to a prototype level of maturity.
Solar thermal collectors, decarbonising, salt hydrates, silver nanofluids, thermal storage
25-34
Kimpton, Harriet, Jill
30c744e7-3f80-4a81-a53c-03f44074a805
Zhang, Xunli
d7cf1181-3276-4da1-9150-e212b333abb1
Stulz, Eugen
9a6c04cf-32ca-442b-9281-bbf3d23c622d
Kimpton, Harriet, Jill
30c744e7-3f80-4a81-a53c-03f44074a805
Zhang, Xunli
d7cf1181-3276-4da1-9150-e212b333abb1
Stulz, Eugen
9a6c04cf-32ca-442b-9281-bbf3d23c622d

Kimpton, Harriet, Jill, Zhang, Xunli and Stulz, Eugen (2020) Decarbonising heating and hot water using solar thermal collectors coupled with thermal storage: The scale of the challenge. 4th Annual CDT Conference in Energy Storage and Its Applications, , Southampton, United Kingdom. 09 - 10 Jul 2019. pp. 25-34 .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper explores the feasibility of using renewable solar thermal energy linked to a salt hydrate thermochemical store (reversible chemical reaction involving the addition / removal of water from a salt) to provide a zero-carbon heating and hot water option for an average UK home. Volumetric absorption based on diluted colloidal suspensions or nanofluids containing wavelength tuneable plasmonic silver nanoparticles are a possible means for enhancing solar thermal capture. To make full use of this captured energy, it requires inter-seasonal storage in a suitable energy dense, high efficiency thermal store. As such even the potentially highest energy density obtainable for a salt hydrate thermochemical store would still need a store of greater than 35 m3 (10 MWh) to nearly meet current winter heating and hot water demands (with 1 discharge cycle per annum). With a possible increase in collector efficiency to over 70% such a system would collect enough solar energy annually to become viable for homes with a greater than average (>15 m2) roof area, a lower than median consumption (<12,000 kWhyr-1) and enough space for a large thermochemical store (≤46 m3). This paper concludes by detailing the significant additional research efforts required to bring this possible decarbonising solution to a prototype level of maturity.

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4thACDTCESA Kimpton H no logo for pure
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More information

Published date: 25 February 2020
Venue - Dates: 4th Annual CDT Conference in Energy Storage and Its Applications, , Southampton, United Kingdom, 2019-07-09 - 2019-07-10
Keywords: Solar thermal collectors, decarbonising, salt hydrates, silver nanofluids, thermal storage

Identifiers

Local EPrints ID: 438537
URI: http://eprints.soton.ac.uk/id/eprint/438537
PURE UUID: 0616694a-2ad7-4109-9fb2-88338c4e74c8
ORCID for Harriet, Jill Kimpton: ORCID iD orcid.org/0000-0002-3219-217X
ORCID for Xunli Zhang: ORCID iD orcid.org/0000-0002-4375-1571
ORCID for Eugen Stulz: ORCID iD orcid.org/0000-0002-5302-2276

Catalogue record

Date deposited: 13 Mar 2020 17:30
Last modified: 26 Nov 2021 02:52

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Contributors

Author: Harriet, Jill Kimpton ORCID iD
Author: Xunli Zhang ORCID iD
Author: Eugen Stulz ORCID iD

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