Opportunities for improved space heating energy efficiency from fluid property modifications
Name:
IBE-22-0150-R1-Williams Accepted ...
Size:
2.830Mb
Format:
PDF
Request:
Article - AAM
Abstract
Unsteady behaviour of hydronic heating systems causes higher mean room temperatures than are required for comfort. Peak room temperatures depend on interactions between thermostats, heat emitters and the room. The importance of fluid properties on such unsteady heating is often misunderstood meaning potential energy savings are overlooked. This paper demonstrates the influence of fluid modifications and indicates a plausible magnitude of the energy saving opportunity. The results showed that fluid side heat transfer coefficient in isolation had negligible effect. Specific heat capacity of the fluid and flow rates were important, as they altered the amount of embedded energy in the heat emitter when thermostat was met. Reductions in mean heating power for steady demand conditions were between 0 and 7% for plausible changes to fluid properties, depending on heat emitter size, room insulation and external temperature. Reductions in individual cycle energy were between 5 and 25%. When considered in the context of intermittent finite duration heating events, those that contained a small number of thermostat cycles demonstrated energy savings that tended towards the reductions in individual cycle energy. Heating events with larger numbers of cycles showed energy savings tending towards the reduction in mean heating power.Citation
Williams, A. M., & Innerdale, D. T. (2023). Opportunities for improved space heating energy efficiency from fluid property modifications. Indoor and Built Environment, 32(5), 852-863. https://doi.org/10.1177/1420326X221139094Publisher
SAGE PublicationsJournal
Indoor and Built EnvironmentAdditional Links
https://journals.sagepub.com/home/ibehttps://journals.sagepub.com/doi/10.1177/1420326X221139094
Type
ArticleDescription
Williams, A. M., & Innerdale, D. T., Opportunities for improved space heating energy efficiency from fluid property modifications, Indoor and Built Environment (Journal Volume Number 32 and Issue Number 5) pp. 852-863. Copyright © [2022] (The Author(s). Reprinted by permission of SAGE Publications.ISSN
1420-326XEISSN
1423-0070ae974a485f413a2113503eed53cd6c53
10.1177/1420326X221139094
Scopus Count
Collections
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by-nc-nd/4.0/