City University of Hong Kong Department Name

 

Indoor Environmental Quality

        

       For sustainable buildings, it is important to promote energy efficiency with the same emphasis on the health and comfort requirements.  Indoor environmental quality (IEQ) is a performance indicator used to demonstrate the effectiveness of healthy and quality living environment.  There are four key attributes of IEQ, namely thermal comfort, indoor air quality, lighting comfort and quiet.  Satisfactory IEQ can be achieved in the subtropical Hong Kong with high population density, but there is no free lunch.  It has to pay in order to fulfill the expectation of comfort and healthiness.  Electrical installations and appliances are commonly used to create the necessary IEQ.  We can enjoy a cool indoor environment by using air-conditioners during the hot and humid summer time; a warm home by using air heaters in the winter; a pleasant indoor air quality by using air cleaners; and sufficient and comfortable lighting with luminaires.  All these installations and appliances make use of electricity to provide the desired IEQ for us.  Therefore, IEQ is considered to be an independent factor in parallel to energy efficiency of sustainable building design.

  

      There is worldwide plea to reduce carbon dioxide emission. In response to such a call, several governments in East Asia encourage the adoption of higher room temperatures in summer. The public is first to be convinced that such practice would not sacrifice the thermal comfort of the occupants.  Survey and numerical analyses were performed to test the thermal sensation of the peoples of Hong Kong as compared to those in other places.

Gender comparison of thermal sensation of young people of Hong Kong at clothing level 0.55 clo and metabolic rate 1.0 met

Combined effect of air temperature and speed on thermal sensation for sedentary working environment in Hong Kong from slightly cool (TS = -1) to slightly warm (TS = 1)

 

Related publications :

Journal articles:

Lin, Z., Chow, T.T., Fong, K.F., Wang, Q., Li, Y., Comparison of performances of displacement and mixing ventilations. Part I: thermal comfort.  International Journal of Refrigeration, 28(2), 2005, pp. 276-287.

Lin, Z., Chow, T.T., Fong, K.F., Tsang, C.F., Wang, Q., Comparison of performances of displacement and mixing ventilations. Part II: indoor air quality.  International Journal of Refrigeration, 28(2), 2005, pp. 288-305.

Lin, Z., Chow, T.T., Tsang, C.F., Chan, L.S., Fong, K.F., Effect of air supply temperature on the performance of displacement ventilation (part I): thermal comfort.  Indoor and Built Environment, 14(2), 2005, pp. 103-115.

Lin, Z., Chow, T.T., Tsang, C.F., Fong, K.F., Chan, L.S., Effect of air supply temperature on the performance of displacement ventilation (part II) C indoor air quality.  Indoor and Built Environment, 14(2), 2005, pp. 117-131.

Fong, K.F., Chow, T.T., Li, C., Comfort zone of air speeds and temperatures for air-conditioned environment in the subtropical Hong Kong. Indoor and Built Environment, 19(3), 2010, pp. 375-381.

Chow, T.T., Fong, K.F., Givoni, B., Lin, Z., Chan, A.L.S., Thermal sensation of Hong Kong people with increased air speed, temperature and humidity in air-conditioned environment. Building and Environment, 45(10), 2010, pp. 2177-2183.

Fong, K.F., Chow, T.T., Li, C., Lin, Z., Chan, L.S., Effect of neutral temperature on energy saving potential of centralized air-conditioning systems in subtropical Hong Kong. Applied Thermal Engineering, 30(13), 2010, pp. 1659-1665.

Fong, M.L., Lin, Z., Fong, K.F., Chow, T.T., Evaluation of thermal comfort conditions in a classroom with three ventilation methods. Indoor Air, 21(3), 2011, pp. 231-239.

Cheng Y, Fong ML, Yao T, Lin Z, Fong SKF. Uniformity of stratum ventilated thermal environment and thermal sensation. Indoor Air, 2014, DOI: 10.1111/ina.12097.

Conference papers:

Fong, K.F., Chow, T.T., Givoni, B., Optimal air temperature and air speed for built environment in Hong Kong from thermal comfort and energy saving perspectives. Proceedings of SB08, Vol. 2, Melbourne, Australia, September 2008.

Fong, M.L., Fong, K.F., Lin, Z., Experimental study of determining neutral temperatures for conventional mixing and stratum ventilation modes in environmental chamber. Proceedings of the 5th Asian Conference on Refrigeration and Air-conditioning, Tokyo, Japan, 7-9 June 2010. (CD-ROM).

Fong, K.F., Lin, Z., Chow, T.T., Chan, A.L.S., 2012. Evaluation and enhancement of indoor environmental quality for domestic communities in modern city. The Proceedings of 2012 IFME World Congress on Municipal Engineering, Helsinki, Finland, 4-7 June 2012.

Lin Z, Fong ML. Design of Thermal Comfort in a Stratum Ventilated Classroom. Proceedings of Clima 2013 – "the 11th REHVA World Congress and the 8th Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings", Prague, Czech Republic, 16-19 June 2013, CD-Rom (ISBN 978-80-260-4001-9).

 

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