A dynamic simulation of the HVAC system is being paid attention because of the development of the computer technology. Authors examined the reproducibility of HVACSIM+(J). As current program could not calculate the object system, it was the new component model corresponding to a model system was developed. As the result, it was shown that HVACSIM+(J) have enough reproducibility and possibility to generate the database for the fault detection and diagnosis, FDD, by comparing the simulated results and the measurements.
Despite the obvious importance of thermal comfort in the design of indoor environment, it has not been effectively integrated with design decision support tools. The reasons can be attributed in part to an absence of modular and flexible software architecture that facilitates dynamic data transfer between energy performance, lighting simulation, and thermal comfort modules.
This paper presents an investigation of the energy performance in an office building in Daejeon, Korea. The office building has a south-facing glazed double envelope and a rectangular atrium. During the preliminary design of the building, a study was conducted by the research team in order to achieve the annual energy consumption per unit area of the building under 240 Mcal/m2-yr. A number of building designs and HVAC system variables were analyzed in terms of energy performance.
We first developed an actual HVAC experimental chamber including an air distribution system, an air handling unit, fan coil units, and control systems. This experimental chamber is a real size model of a typical office and has a floor area of 61.44m2.
The IMAGE (IMplementation of Advanced Glazing in Europe) project was funded by the European Commission and involved glass manufactures, onsultants and research organisations (see acknowledgements).
The paper presents the results from a numerical and experimental investigation of the velocity distribution in a ventilated industrial hall in the nuclear power plant in Bulgaria. The room with a complex geometry and irregular boundary conditions was calculated using the finite volume discretisation of the Reynolds-averaged Navier-Stokes equations closed by the standard k-e turbulence model. The numerical results are compared with the experimental data in representative cross-sections which shows a satisfactory agreement.
The paper presents an interactive on-line package for calculation of energy and cost demands for residential infiltration and ventilation, with input and output data entry through a web browser. This is a unique tool. It represents a new kind of approach to developing software employing user (client) and server (package provider) computers. The main program, servicing “intelligent” CGI (Common Gateway Interface) calls, resides on the server and dynamically handles the whole package performance and the procedure of calculations.
The well-known versions of the sunpath diagrams that appear in the AIA’s Architectural Graphics Standards are based on the equidistant sky dome projections and use a shading mask protractor developed by Olgyay and Olgyay at Princeton University in the 1950s.
A numerical and experimental study is performed to analyze the influence of natural convection on heat transfer in a composite system comprising a porous material heated from below and an air space situated above this. The numerical model is verified by conducting a number of experiments, on a model material consisting of polystyrene pellets of cylindrical shape, made in the Wind Box. This apparatus is a prototype and has been designed and developed at the Department of Building Physics.
This paper discusses a multi-year (MY) approach to building energy simulation and presents a pilot study in Hong Kong that investigates long-term building energy performance using MY weather data. Building energy simulations in the pilot study were carried out using the DOE-2.1E program. A set of 17 years hourly weather data (1979-95) was taken as the weather input to drive the simulation. It is found that the MY approach can provide more information for the analysis of long-term building energy performance and climatic properties.
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