doi:10.3850/978-981-08-6396-8_P142

ABSTRACT

DT21 station which is planned as one of the stations of the Downtown Line mass rapid transit system will be the deepest station in Singapore. It comprises six basement storeys with the platform located at about 42 metres below ground. It has a very narrow platform of about 10.3 metres wide and a high void that links all the six basement storeys. The deep and narrow station layout and the central void have posed a great challenge to the designer to come out with an innovative, cost-effective and energy efficient air-conditioning design for the station public area. Various types of air-conditioning concepts such as mixing and displacement were studied during design development stage. The final design comprises supply air nozzles/ diffusers and return air grilles strategically located to effectively cool the station for the thermal comfort of the passengers while saving on energy consumption. Computational Fluid Dynamic (CFD) study has been performed to verify the indoor conditions at both occupant and non-occupant zones of the station to ensure that the final design meet the design criteria and objectives. The paper presents the process in developing the final design, the options and the CFD simulation results.

Keywords: Mass Rapid Transit System, Deepest Station in Singapore

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