A numerical simulation study on natural ventilation of two connected chambers in connection with anambient environment is presented in the paper. Extending a model of single-room displacementventilation, this study addresses a space consisting of two chambers connected by one opening at thelow level of the shared wall. A thermal load is placed only in one chamber, referred as a forced chamber,and the other chamber, unforced chamber, has no heat load. The space is connected to the outsideambient environment to have displacement ventilation in both chambers.

Chinese kang, an ancient home heating system, is an integrated system for cooking, sleeping,domestic heating and ventilation. It is estimated that in 2004 there were all together 66.85 millionChinese kangs used by 43.64 million rural families and 174 million people. Chinese kang is potentiallyan energy-saving heating system, which uses high thermal mass to store surplus heat from stoveduring cooking and releases it during the rest time for home and bed heating. Such a widely used ruraldomestic heating system is rarely mentioned in the open research literature.

Malaysia is situated near the equator of earth where the weather is hot and humid. The vulnerableenvironment has induced many Indoor Air Quality (IAQ) concerns in hospitals by health professions inmany countries. There is mounting evidence on IAQ exposure leading to excessive morbidity andmortality. Many extensive studies have been conducted but there is not many IAQ standard to-date.The objective of the study is to present the finding of the source of indoor air quality in a new hospital inMalaysia. The study also presents the solution to overcome the IAQ problem faced by the hospital.

This study evaluated and optimized the thermal environment inside an air-conditioned train stationbuilding using the computational fluid dynamics (CFD) method. The impacts of some air-conditioningdesign parameters such as supply air temperature, velocity, altitude and incidence angle on indoorthermal environment were discussed. The primary air-conditioning design scheme was optimized.

The heat and mass transfer mode of the plate-fin enthalpy exchanger is simplified as the cross-flowheat exchanger in which the fluids of two sides do not mix up. Based on the analogical principle of heatand mass transfer, the relationship of? ? NTU is computed and plotted by the numerical calculation.Compared this relationship with experimental result, it can be drawn that this relationship is accurate tomeet the requirement of engineering. According to the result of numerical calculation and experiment,air face rate has more influence on sensible efficiency than latent efficiency.

As two common kinds of air supply modes, natural wind and mechanical wind have obvious differenceson human sensation. From former researches, it can be seen that the 1/f fluctuation property of thespectrum of natural wind is an important factor to cause people feel more comfortable.

In This paper, we offered a method of exergy-economic coefficient ? analyzed the distributedpower-supply system of gas turbine co-generation and calculated the exergy-economic coefficients ofthis system. The results indicated that the distributed power-supply system of gas turbinecogeneration had higher thermal economy?Further we analyzed the sensitivities and got theexergy-economic coefficient of this system under different natural gass prices?

As a new way of air conditioning, task air conditioning (TAC) system is often used in combine withbackground air conditioning (traditional central air conditioning) system. In this research, the ComputationalFluid Dynamics (CFD) technique is used to analyze the impact on thermal environment of task zone whenthese two air conditioning systems are used together. The purpose is to find the thermal satisfactory workingconditions of the task air conditioning when the temperature of the background air conditioning is set to behigh.

In the study of indoor and outdoor thermal environment, the analysis and calculation for radiation are adifficulty when the opaque and half-transparent objects exist together, especially for analyzing theindoor environment for atrium, building with large scale transparent envelope and some half-open areawith plants. The traditional method is hard to deal with the long-wave and short-wave radiation issueswhen several opaque and half-transparent objects exist together, and the accuracy description of thethermal environment becomes a problem.

The Korean Ministry of Construction and Transportation(MOCT) has imported the Intelligent BuildingCertification Program(IBCP) to grant certification by evaluating the standard of Intelligent buildings(IB).The purpose of this research is to introduce the IBCP of Korea and to analysis of energy reduction ratein buildings from the enforcement of certification system. At this time, the result of deriving items relatedto building energy among evaluation items of IBCP and performing comparative analysis by setting upthe standard building have been presented for the amount of energy reduction.