Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The BRIS simulation program for thermal design of buildings and their services
AbstractThe BRIS computer program was first presented in Sweden as early as in 1963. Since that time BRIS has been extended several times to improve the data handling, taking advantage of feedback from the program use in a large number of research and design applications.The program, developed at the Royal Institute of Technology, Stockholm, calculates the temperature variations in a room by using a system of heat balance equations solved by an iterative, finite difference method. Heat transfer by conduction inside walls and floors, convection between room surfaces and room air and radiation between room surfaces is taken into account at every time step.An iterative method like that applied in BRIS yields a good calculation accuracy. Linear modelled processes are not required. Another benefit from the iterative procedure is versatility, achieved in BRIS by the use of a variable called ‘quantity sought’, which can be given different code numbers depending on the quantity that is to be determined, e.g., room air temperature or supply air flow rate, and limitations of that quantity. A code chain is formed when more than one quantity is sought in sequence during the calculation period.Heat flows to or from the room surface layers are recorded as a part of the room heat balance. In this way it can be easily shown, for instance, how much heat stored in the building structure can reduce cooling requirements when a small rise in operative temperature is permitted during the peak hours.
The BRIS simulation program for thermal design of buildings and their services
AbstractThe BRIS computer program was first presented in Sweden as early as in 1963. Since that time BRIS has been extended several times to improve the data handling, taking advantage of feedback from the program use in a large number of research and design applications.The program, developed at the Royal Institute of Technology, Stockholm, calculates the temperature variations in a room by using a system of heat balance equations solved by an iterative, finite difference method. Heat transfer by conduction inside walls and floors, convection between room surfaces and room air and radiation between room surfaces is taken into account at every time step.An iterative method like that applied in BRIS yields a good calculation accuracy. Linear modelled processes are not required. Another benefit from the iterative procedure is versatility, achieved in BRIS by the use of a variable called ‘quantity sought’, which can be given different code numbers depending on the quantity that is to be determined, e.g., room air temperature or supply air flow rate, and limitations of that quantity. A code chain is formed when more than one quantity is sought in sequence during the calculation period.Heat flows to or from the room surface layers are recorded as a part of the room heat balance. In this way it can be easily shown, for instance, how much heat stored in the building structure can reduce cooling requirements when a small rise in operative temperature is permitted during the peak hours.
The BRIS simulation program for thermal design of buildings and their services
Brown, Gösta (Autor:in)
Energy and Buildings ; 14 ; 385-400
11.10.1990
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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