TERM CONSULTANCY FOR AIR VENTILATION ASSESSMENT SERVICES Cat. A Term Consultancy for Expert Evaluation and Advisory Services on Air Ventilation Assessment (PLNQ 37/2007) TERM CONSULTANCY FOR AIR VENTILATION ASSESSMENT SERVICES Cat. A – Term Consultancy for Expert Evaluation and Advisory Services on Air Ventilation Assessment (PLNQ 37/2007) Final Report - Mid Levels West March 2008 ………………………………………. by Professor Edward Ng Department of Architecture, CUHK, Shatin, NT, Hong Kong T: 26096515 F:26035267 E:
[email protected] W: www.edwardng.com Final Report Page 1 of 48 14 March 2008 TERM CONSULTANCY FOR AIR VENTILATION ASSESSMENT SERVICES Cat. A Term Consultancy for Expert Evaluation and Advisory Services on Air Ventilation Assessment (PLNQ 37/2007) The Study Area Final Report Page 2 of 48 14 March 2008 TERM CONSULTANCY FOR AIR VENTILATION ASSESSMENT SERVICES Cat. A Term Consultancy for Expert Evaluation and Advisory Services on Air Ventilation Assessment (PLNQ 37/2007) Expert Evaluation Report of Mid-Levels West Executive summary 0.1 Wind Availability: (a) The prevailing summer wind of the study area comes from the south. The prevailing annual wind of the study area comes from the East and North-East. (c) The hills south of the study area shield and reduce the air ventilation potentials. They also complicate the wind regime of the study areas when the summer wind comes from the south. (b) At 500m above ground, it is estimated that the site wind is on average in the order of 6 to 8 m/s; and at the top of the urban canopy layer (UCL) (about 100 to 150m), it is estimated that the site wind is on average in the order of 3-5 m/s.