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IJSTR >> Volume 5 - Issue 5, May 2016 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Effectiveness Of UVC Lights Irradiation To Improve Energy Saving

[Full Text]



Sameer A. Bilal



UVGC, HVAC, Sample Collection, Energy Saving, Characterization, DX-System, AHU Units



HVAC (Heating, Ventilation and Air conditioning) is the largest consumer of energy in commercial and industrial buildings. HVAC systems account for an approximated 50% of energy use in buildings. The sources of contamination and odour comes from the growth of bacteria, mold and fungus that accumulate and develop on wet surfaces of HVAC coils and drain pans ,causing respiratory infection, cough, tight chest and wheezing. Besides the effects on human health, Fungal contamination that adheres to the fins of cooling coil of air handling unit ( AHU ) cause a significant increase in pressure drop across the coil and decrease in heat exchange efficiency , which Leeds to loss of cooling capacity and additional energy use. To prevent the fungal and microorganism growth on the cooling coil and drain pan of HVAC systems, many studies conducted but not all these solutions were sufficient to remove microbial organism from the HVAC 100 %. The UV-C light options, through a process known as UVGI ( Ultraviolet germicidal irradiation ) is a technology showed a significant impact to produce clean air and improve indoor air quality [16]. UVGI lights produce short wavelength light kills microorganisms, including viruses, bacteria, mold and many other fungi by disrupting their DNA. The effectiveness of UVGI installed inside HVAC systems depends on many factors and the application Methods in HVAC systems. A few studies showed whether the use of (UVGI) results in energy saving. The objective of this study is to find the effect of fungal growth on the cooling coil surface by using field measurements at actual operating conditions of heat transfer and air flow for a non-irradiated coil in comparison to irradiated coil .Hence evaluate if there would be an enthalpy change at the coil and document the effectiveness of UVGI coil cleaning on restoring cooling capacity and save energy.



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