English

The transient accessibility of supply air (TASA) and transient accessibility of contaminant source (TACS) in ventilated rooms are important indices to evaluate the effect of ventilation and the indoor air quality (IAQ). These indices can be measured by experimental method or calculated with computational fluid dynamics (CFD) tools. Compared to the measurement method, the numerical method has a lot of advantages such as fast, flexible and with detailed data. In this paper, the calculation and validation of the TASA and TACS are introduced.

In the article the authors present the results of heating and cooling energy usage of earth-sheltered houses with exposed southern elevations. The results were then compared to a conventional above-ground building.

This paper presents the development of a model, using TRNSYS, of a large central cooling and heating plant. The model includes the chillers, cooling towers and pumps of the chilled water loop, and the heat recovery system from the chillers. The model is calibrated with monitored data of June 23rd to June 29th, 2008, and then tested with data over the summer season, from June 23 to September 21, 2008.

This paper established a demand control ventilation (DCV) strategy for subway platform. Firstly, steady-state CFD simulation was carried out to predict the space CO2 distribution in the platform. Secondly, both CO2 control point and base ventilation rate were determined. Then authors developed a DCV dynamic model by control processing simulation. The simulation results show that using this ventilation strategy can achieve an acceptable indoor air quality.

In this paper, the results of simulating the cooling energy demand of a reference shophouse in Jakarta, Indonesia are presented. The building reference is a two-storey shophouse, of which ground floor is used as a shop and upper floor as a dwelling. The simulation and visualization tool used was DesignBuilder v.1.8 (www.designbuilder.co.uk, 2008), an Energy Plus based dynamic thermal simulation engine. First of all, a reference building was simulated, in order to obtain its cooling energy demand.

Using a simulation application and a sample of five existing office buildings, we parametrically explored building features and measures that could improve the thermal performance of office buildings in Kumasi, Ghana. To improve the reliability of the simulation results, the simulation models were calibrated using long-term continuous measurements on environmental conditions (air temperature, relative humidity) inside and in the immediate vicinity of the selected objects. The simulation results demonstrate that changes in the building fabric (e.g.

Design of different energy-efficient office buildings in Norway with different energy concepts were studied with a number of different shapes. With the help of dynamic computer simulations of energy and indoor environment for the various building concepts the impact the different parameters on energy use and indoor environment was analyzed.

The tombs of the Pharonic kings in "valley of the kings", Thebes, Egypt are famous for their unique wall paintings and structure. KV62, King Tutankhamen tomb, is the most famous because of the treasures it held intact for over three thousand years. The tombs of Kings Ramses VII, known as KV1, Ramses IV, (KV2) and Siti II (KV15) were also investigated in the present work. The present work pursues a research plan to design and utilize a CFD model to numerically model the flow pattern, heat transfer and humidity in the tombs.

Design of different energy-efficient office buildings in Norway with different energy concepts were studied with a number of different simulation tools. With the help of dynamic computer simulations of energy and indoor environment the impact on energy use and indoor environment was analyzed. A focus was put on a comparison of different simulation tools and their accuracy in predicting the performance in terms of thermal comfort and energy consumption of various cases.  The results show that significant differences in output of the various tools make an objective evaluation difficult.

It is necessary to do research on the heat and moisture transfer in the earth-sheltered building for getting a better underground environment. Based on Philips and De Vries’ and Zhang’s theory (Philip et al., 1957; Zhang et al., 2006), this paper establishes a detailed 2-D transient mathematical model to understand the heat and moisture transfer exactly in the earth-sheltered building envelope and the surrounding soils. A general FEM (Finite Element Method) software is adopted to solve the highly nonlinear governing equations.