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VoiceLink | Issue 71 | MiMEP Greatly Facilitates Installation of Large Equipment
2024-07-30
The EMSD adopted the Multi-trade integrated Mechanical, Electrical and Plumbing (MiMEP) approach to replace the air handling unit (AHU) in our Headquarters for the first time, greatly improving the works efficiency. The MiMEP method enables “off-site prefabrication and on-site assembly”, where electrical and mechanical (E&M) components are pre-manufactured in a factory and then transported to the Headquarters for assembly, thus streamlining the on-site installation process. The works period was much shortened from the original nine days to three days, resulting in significant time saving.

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Energy-saving and Carbon Reduction Initiatives of EMSD and HA Won Technology Award
2024-11-19
In response to the target of achieving carbon neutrality set out in the Hong Kong’s Climate Action Plan 2050, the EMSD has collaborated with the Hospital Authority (HA) to develop various energy-saving and carbon reduction improvement projects. One of the key projects is the replacement of high energy-efficient chillers at the Main Block of Tuen Mun Hospital. With the project completed and the new chillers put into operation in 2023, the electricity consumption of chillers has significantly been reduced by 26%, resulting in an annual saving of approximately 2.8 million kWh of electricity, or a reduction of 1 950 tonnes of carbon emissions for the venue.

Given that global warming is getting increasingly serious, the EMSD has specially introduced chillers using the new environmental friendly hydrofluoroolefin (HFO) refrigerant R1233zd, which has low toxicity and is non-flammable, to help mitigate global climate change. Moreover, in order to ensure a stable and reliable supply of air-conditioning to support 24-hour uninterrupted operation of the hospital, the project has made reference to the Best Practices for Operation and Maintenance Service of Heating, Ventilation and Air-Conditioning Installations published by the EMSD. In replacing the chiller units, the related design was adjusted to incorporate interconnections, changeover and by-pass facilities, so as to maximise the resilience of overall air-conditioning system and minimise impact to users during maintenance activities.

With the successful implementation of the above project, the EMSD and the HA were awarded the ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) Hong Kong Chapter Technology Award 2024. The EMSD engineering team is much encouraged by the award, and looks forward to continuing collaboration with the HA and other client departments to take forward more innovative E&M projects, with the aim of enhancing the energy efficiency of clients’ E&M facilities, and thereby contributing to Hong Kong’s effort in combating climate change and achieving carbon neutrality.

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