Energy efficiency potential of radiant and convective room units with utilization building thermal mass in design conditions

Panu Mustakallio, Zhecho Bolashikov, Tetiana Mialyk, Risto Kosonen, Arsen Melikov

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

The demand for high energy efficiency of office buildings has increased the use of demand based HVAC systems. One advanced demand based use of radiant and convective HVAC room units would be the utilization of building thermal mass to reduce cooling design power. This paper presents energy simulation case study of a simplified office building with active chilled beam and chilled ceiling with mixing ventilation. It compares the cooling load and cooling energy consumption in design day with heavy and light construction, and shows the potential for energy efficiency.
Both active chilled beam and chilled ceiling system with mixing ventilation were
maintaining all office rooms in design room temperature. The chilled ceiling system had more limited cooling capacity, whereas active chilled beam was able to provide cooling also with higher inlet water temperature. The operating schedule and room air temperature set-point had significant effect to the cooling demand especially in the chilled ceiling case with heavy construction. The reduction of the cooling design power by controlling the operating schedule during cooling design days could bring savings in cooling system dimensioning, and possibility to dimension HVAC room units with higher cooling water inlet temperature and reach energy savings from
efficient utilization of alternative energy sources.
Original languageEnglish
Title of host publicationCLIMA 2016 - proceedings of the 12th REHVA World Congress
PublisherAalborg University, Department of Civil Engineering
ISBN (Electronic)87-91606-30-6
Publication statusPublished - 2016
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings - Aalborg, Denmark
Duration: 22 May 201625 May 2016

Conference

ConferenceInternational Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings
Abbreviated titleIAQVEC
CountryDenmark
CityAalborg
Period22/05/201625/05/2016

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