Computer modelling and experimental investigation of building integrated sub-wet bulb temperature evaporative cooling system

Boukhanouf, Rabah; Alharbi, Abdulrahman; Ibrahim, Hatem G.; Amer, Omar; Worall, Mark

Abstract

The paper presents computer modelling and laboratory experiment results of a sub-wet bulb temperature indirect evaporative cooling system for space cooling in buildings. The prototype employs hollow porous ceramic water containers as wet media material for water evaporation. The cooled air is delivered without increasing its moisture content. The performance of the cooler was evaluated using a computer model, and the results of which were validated experimentally. The cooling capacity and effectiveness of the cooler were evaluated at inlet air dry bulb temperature of 30 and 35°C and relative humidity ranging from 35% to 50%. It was found that the cooler can supply air for space cooling at sub-wet bulb temperature conditions; achieve measured cooling capacity approaching 225 W/m2 of exposed ceramic material wet surface area and wet bulb effectiveness higher than unity. The high thermal performance of the constructed evaporative cooler indicates the system could be a potential substitute to conventional mechanical air-conditioning systems in buildings in many parts of the world where hot and dry climatic conditions prevail.

Citation

Boukhanouf, R., Alharbi, A., Ibrahim, H. G., Amer, O., & Worall, M. (2017). Computer modelling and experimental investigation of building integrated sub-wet bulb temperature evaporative cooling system. Applied Thermal Engineering, 115, https://doi.org/10.1016/j.applthermaleng.2016.12.119

• Journal Article Type: Article
• Acceptance Date: Dec 26, 2016
• Online Publication Date: Dec 28, 2016
• Publication Date: Mar 25, 2017
• Deposit Date: Jan 12, 2017
• Publicly Available Date: Jan 12, 2017
• Journal: Applied Thermal Engineering
• Print ISSN: 1359-4311
• Electronic ISSN: 1873-5606
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 115
• DOI: https://doi.org/10.1016/j.applthermaleng.2016.12.119
• Keywords: Evaporative cooling, Sub-wet bulb temperature, Heat and mass transfer, Wet media, Dew point
• Public URL: https://nottingham-repository.worktribe.com/output/851968
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S1359431116343964