EMSD Recognised by ACEHK Annual Awards for
Innovative Techniques to Overcome Engineering Challenges
In the inaugural Annual Awards of the Association of Consulting Engineers of Hong Kong (ACEHK), EMSD was awarded the “Overall Best Award” for our effort in adopting innovative and professional techniques to successfully tackle numerous challenges and problems encountered in the laying of the subsea pipelines for the District Cooling System (DCS) at Kai Tak Development (KTD). This is a recognition of our excellent work and an affirmation of our team’s problem-solving capability. The Annual Awards Presentation Ceremony was held on 20 November 2017. Mr. Frank Chan, Secretary for Transport and Housing, and Mr. Hon Chi-keung, Permanent Secretary for Development (Works), were invited to deliver a keynote speech and present the awards respectively.
The DCS at KTD Phase III (Package A) project met with a host of challenges, one of which was to supply chilled water from DCS South Plant to the Hong Kong Children’s Hospital on the other side of the Kai Tak Approach Channel. By employing the city’s largest tunnel boring machine, two sleeve pipes measuring 2.8m in diameter were laid below the seabed by trenchless pipe jacking method, with two chilled water pipes installed within each sleeve pipe. The biggest challenge of this first-of-its-kind subsea pipe jacking work is that close monitoring of the direction of advancement and progress is required throughout the entire jacking operation, and that it must be ensured that the path of the tunnel boring machine should be clear of obstacles, a task that necessitates an exceptionally high level of engineering technique. In addition, we installed a chiller plant of 5 000 refrigeration tonnes (17.5 megawatt of refrigeration cooling capacity) for the first time in the project, the largest of its kind in Hong Kong.
Upon the completion of the entire DCS at KTD, an estimated 85 million kWh in electricity consumption can be saved every year, that is equivalent to a reduction of 59 500 tonnes of carbon dioxide emission per annum. By connecting to the DCS, user buildings can save on installing their own chillers and the associated equipment, which accounts for 5 to 10% of the total building cost. DCS has been widely adopted in other parts of the world, such as the United States, Singapore, and many European and Middle Eastern countries. The SAR Government is also actively studying the possibility of adopting the DCS in other new development areas in Hong Kong.