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Hong Kong Building Energy Code 2018 adopts VSD (frequency inverters) for cooling tower fans
8 August 2019

John Herbert, hong kong energy saving expert, BEAM expert
John Herbert
Director


More than a decade ago John Herbert wrote a technical article for the BEAM society newsletter, published in 2006, now you have to remember at that time, cooling towers were still relatively "new" in Hong Kong.

John Herbert Hong Kong
John Herbert



The moratorium had only been lifted six years earlier in 2000, and then, limited to certain districts. Gradually, new districts were included expanding the possibilities for water based cooling towers, and very slowly, gained popularity.

hong kong building energy code 2018



The 2006 cooling tower article focused on, and advocated best practice for efficient operation of cooling towers, and that included Variable Speed Drives (frquency invertors) for cooling tower fan speed control. There are several reasons to change the cooling tower motor speed, including better control and the most obvious being energy saving.

hong kong beam newsletter 2006 by John Herbert

BEAM Society newsletter 2006 Cooling Towers by John Herbert (pdf)



Fast foward to 2019, in the latest version of the Building Energy Code (BEC) 2018 version, that came in to effect in 2019, including a new cooling tower fan efficiency requirement and clause 6.12.5.

Translating that clause into plain english, essentially it means variable speed drive (frequency inverters) are mandatory for cooling tower fans installations, nearly twenty years after the cooling tower moratorium was lifted.

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Coincidentally, the HKSAR Government also recently launched its Decarbonising Hong Kong public consultation in 2019. Let's hope, given the urgency and leadership opportunities, it doesnt take as many years again to implement and adopt obvious energy saving measures.

About the Author

John Herbert is a veteran chief engineer with more than 30 years international engineering experience, educated in the United Kingdom, he worked in the UK and then across Asia for more than two decades engaged by international and local companies. He is a Hong Kong Registered Energy Assessor (REA) and BEAM Professional, and is stationed in Hong Kong.



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date: 24-10-19
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