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Thermal Mass and Night Ventilation –
Utilising “Hidden” Thermal Mass
Nick Barnard
FaberMaunsell,
Marlborough House, Upper Marlborough Road, St. Albans, AL1 3UT, UK
Abstract
This paper presents an overview of systems that utilise thermal mass in
conjunction with night ventilation. It discusses the concepts behind and
development of a system (“CoolDeck”) to improve the performance of
systems where air is ventilated through false ceiling and floor voids to
access “hidden mass”. The system improves thermal interaction between
the circulating air and the thermal mass of the slab. A case study is
presented demonstrating the effectiveness of the system in a refurbishment
application (Stevenage Borough Council (UK) offices). The incorporation of
phase change material into the system for a subsequent phase of the
refurbishment is also described.
Key words:
Thermal mass, night cooling, passive cooling, phase change
materials, case study, refurbishment.
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