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Evaluation of retrofit approaches for two social housing tower blocks in Portsmouth, UK

Evaluation of retrofit approaches for two social housing tower blocks in Portsmouth, UK
Evaluation of retrofit approaches for two social housing tower blocks in Portsmouth, UK
The UK aims to reduce its carbon emissions focusing on the renovation of its existing building stock, particularly on the residential sector. Within this group, social housing is an excellent candidate for retrofits, but faces specific challenges. The cases presented in this study are social housing tower blocks in the City of Portsmouth, which are destined to be retrofitted but present particularities within its architecture, heating system, and occupants’ behaviour and comfort perception. This study presents an analysis of the thermal performance of these buildings after different retrofit intervention scenarios were undertaken to evaluate heating loads, comfort and overheating. A dynamic simulation model was developed using the software TRNSYS and included performance evaluation under future climate change scenarios. Firstly, the buildings were modelled under different occupier energy profiles and the results in all cases, show that the physical properties of the building lead to a high level of energy consumption and discomfort. Moreover, the simulation of possible retrofits demonstrated that improving the building envelope to meet 2010 Building Regulations or stricter standards would result in a decrease of more than 80% of the heating load but would result in overheating if no adequate shading is installed. The analysis indicates that the best performing retrofit corresponded to a mixed system of MHRV for heating and natural ventilation during the summer. The paper concludes that (a) existing buildings are inefficient and a retrofit would result in a complete change in their energy performance and (b) that a thorough economic appraisal is required to select the best environmentally and economically viable interventions.
social housing, retrofit, storage heaters, thermal comfort, overheating
2363-9075
Aragon, Victoria
f2a397a1-9d24-4f68-8f22-cc3270761d82
Teli, Despoina
4e57e6dd-e0dc-49ef-b711-974ba1c978df
James, Patrick
da0be14a-aa63-46a7-8646-a37f9a02a71b
Aragon, Victoria
f2a397a1-9d24-4f68-8f22-cc3270761d82
Teli, Despoina
4e57e6dd-e0dc-49ef-b711-974ba1c978df
James, Patrick
da0be14a-aa63-46a7-8646-a37f9a02a71b

Aragon, Victoria, Teli, Despoina and James, Patrick (2018) Evaluation of retrofit approaches for two social housing tower blocks in Portsmouth, UK. Future Cities and Environment, 4 (1). (doi:10.5334/fce.8).

Record type: Article

Abstract

The UK aims to reduce its carbon emissions focusing on the renovation of its existing building stock, particularly on the residential sector. Within this group, social housing is an excellent candidate for retrofits, but faces specific challenges. The cases presented in this study are social housing tower blocks in the City of Portsmouth, which are destined to be retrofitted but present particularities within its architecture, heating system, and occupants’ behaviour and comfort perception. This study presents an analysis of the thermal performance of these buildings after different retrofit intervention scenarios were undertaken to evaluate heating loads, comfort and overheating. A dynamic simulation model was developed using the software TRNSYS and included performance evaluation under future climate change scenarios. Firstly, the buildings were modelled under different occupier energy profiles and the results in all cases, show that the physical properties of the building lead to a high level of energy consumption and discomfort. Moreover, the simulation of possible retrofits demonstrated that improving the building envelope to meet 2010 Building Regulations or stricter standards would result in a decrease of more than 80% of the heating load but would result in overheating if no adequate shading is installed. The analysis indicates that the best performing retrofit corresponded to a mixed system of MHRV for heating and natural ventilation during the summer. The paper concludes that (a) existing buildings are inefficient and a retrofit would result in a complete change in their energy performance and (b) that a thorough economic appraisal is required to select the best environmentally and economically viable interventions.

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Accepted/In Press date: 20 December 2017
e-pub ahead of print date: 26 January 2018
Keywords: social housing, retrofit, storage heaters, thermal comfort, overheating

Identifiers

Local EPrints ID: 418752
URI: https://eprints.soton.ac.uk/id/eprint/418752
ISSN: 2363-9075
PURE UUID: 04095616-d883-42d8-848d-07666237609d
ORCID for Victoria Aragon: ORCID iD orcid.org/0000-0002-6175-9454
ORCID for Despoina Teli: ORCID iD orcid.org/0000-0001-7044-0050

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Date deposited: 21 Mar 2018 17:30
Last modified: 14 Mar 2019 01:36

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Contributors

Author: Victoria Aragon ORCID iD
Author: Despoina Teli ORCID iD
Author: Patrick James

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