Available Online at www.e-iph.co.uk Indexed in ScienceOPEN ASLI 2018 AicQoL2018PerhentianIsland http://www.amerabra.org; https://fspu.uitm.edu.my/cebs 6 th AMER International Conference on Quality of Life Pulau Perhentian Resort, Malaysia, 03-04 March 2018 "Quality of Life in the Built & Natural Environment 6” eISSN: 2398-4287© 2018. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open access article under the CC BYNC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia. Thermal Performance of a High-Rise Residential Building with Internal Courtyard in Tropical Climate Lobna Hassan Elgheriani*, Parid Wardi Sudin, Abdul Basit Ali Almhafdy Faculty of Architecture and the Built Environment, Limkokwing University of Creative Technology, Cyberjaya, 63000, Malaysia Email of All Authors: lobna.arch@gmail.com, dato.parid@limkokwing.edu.my, ali.almhafdy@limkokwing.edu.my Tel of 1 st Author:0060182616252 Abstract Natural ventilation is an effectual passive design approach to create a better indoor thermal condition as well as energy efficiency. The primary goal of building design is providing a healthy and comfortable indoor environment titled as sustainable architecture. Literature suggests that the significant feature that alteration has to take place on for better energy performance is the envelope design. This paper aims to augment the Window to Wall Ratio (WWR), orientation and courtyard corridor size for improving the design of naturally ventilated courtyard high-rise residential buildings. Briefly, the findings indicate that contending with WWR, orientation and courtyard corridor size could increase the potential of improving its natural ventilation and thus, thermal performance. Keywords: Thermal Performance; Residential High-rise buildings; Air Velocity, Courtyard eISSN: 2398-4287© 2018. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open-access article under the CC BYNC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia. 1.0 Introduction Comfort is defined as the condition of the mind which expresses satisfaction with the surrounding environment. In architecture science, thermal comfort can be achieved by heat transfer mechanisms in buildings, which are conduction whereby heat energy is transmitted between two bodies in direct contact. (Auliciems, 2007) A building in tropics means a conflict of construction and function with the acute climatic condition. (Saberi, 2006) Tropical climate regions described as high humidity, intemperate rainfall, and substantial sunshine. There are negative impacts and positive impacts on the building design because of the typical features of tropical climate. The extreme effects caused by the tropical climate through its climatic parameters such as temperature, solar radiation, relative humidity, rainfall, and the wind. It is an ideal medium state for rich of tropical plants and rainforest. A successful indoor environment depends more on the understanding of the environmental factors, including building design and setting. (Moore, 1993) Some factors affect thermal sensation which are air temperature, humidity, air velocity, mean radiant temperature, clothing levels and metabolic rate (Finger thermal equations 2001). The technique of attaining thermal comfort in architecture is reinforced by scientific theories, but it is still art. (Olgyay V., 1963) It is undeniable that buildings are facing numerous design issues. Buildings are overheated during the day due to solar heat gain through the building envelope and radiant solar penetration through windows. Traditionally, by applying passive design concept, this heat can be eliminated partly.