|The impacts of buildings’ orientations on building energy consumption
|Wong, Ling Tim (BEEE)
|Buildings -- Energy conservation
Buildings -- Energy consumption
Hong Kong Polytechnic University -- Dissertations
|Department of Building Environment and Energy Engineering
|ii, 50 pages : color illustrations
|Buildings use the most volume of electric energy and are attributed to over half of the greenhouse gas emissions in generating electrical power in Hong Kong. In 2020, commercial buildings accounted for 89.2% of the generated electric power. The office sector consumed 16235 TJ of the total energy ranking in the first place. Air conditioning is always the most significant part of the electricity tariff in a region like Hong Kong. Conducting simulations to reduce the cooling energy demand for office buildings is beneficial. This study has offices in the Hong Kong Polytechnic University campus which TRNSYS Programme simulated. TRNSYS computed the annual thermal load on an hourly basis. And the climate information of Hong Kong in a year was introduced by Meteonorm. The simulation analysed the offices' building orientations, envelop properties and window-to-wall ratio WWR. The simulated suggested that the east direction of the building in Hong Kong can be a suitable design. And the U-factor of windows decreased from 1.1 KW/m2 to 0.5 can help reduce the solar cooling load. Moreover, the WWR was reduced from 70 % to 40%; the level is able to give energy savings of up to 38% a year when the building faces west. The building model serves as a reference for energy efficiency of buildings, which studies the relationship between the physical structure and the decrease in the building energy demand.
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