Experimental studies of a pulse pressurisation technique for measuring building airtightness
A pulse pressurisation technique is developed and utilised for determining building leakage at low pressure,based on a quasi-steady pulse concept.The underlying principle of the technique is to subject the building envelope to a known volume change in a short period of time(typically 1.5 s).The resulting pressure pulse is recorded,from which the leakage characteristic at low pressure is determined.The technique minimizes the effects of wind and buoyancy forces and has proven to be repeatable.It can employ a compact and portable test rig and does not need to penetrate the building envelope.Therefore,it can establish the leakage of a building very quickly and efficiently.Throughout the various stages of research and development of the pulse technique,experimental investigations have been carried out under different configurations and scenarios in order to validate the changes that have been made for the purpose of system development and optimisation.This paper provides an overview of experimental investigations in the validation process by covering comparison between blower door and pulse unit,comparison between piston-based pulse unit and nozzle-based pulse unit,testing with multiple pulse units in a large building,testing with a known opening,and testing in different building types with a range of volumes and airtightness levels.It enables us to understand the strengths and also the limits of the pulse technique,from the experimental and practical perspective.
Building airtightness Blower door Pulse technique Experimental validation
Xiaofeng ZHENG Edward COOPER Yingqing ZU Mark GILLOTT David TETLOW Saffa RIFFAT Christopher WOOD
Architecture,Energy and Environment Research Group,Faculty of Engineering,University of Nottingham,U Department of Mechanics and Engineering Science,Fudan University 220 Handan Road,Shanghai,China
国际会议
武汉
英文
103-114
2018-08-21（万方平台首次上网日期，不代表论文的发表时间）