This paper presents a numerical method for the study of cross-ventilation with respect to the use of local dynamic similarity model. That model is a ventilation model which predicts the discharge coefficient and the inflow angle at the opening of a cross-ventilated building. Results indicate that the flow rate either calculated directly by CFD or using the local dynamic similarity model is acceptable.

For that study, surveys were first performed to study the relationship between indoor temperature and air conditioner On control. Then, a control behavior model including cross ventilation, based on the survey results was devised. Finally, the results simulated with that method were compared to those with the typical method.

In California, the relocatable classrooms are typically under ventilated : such conditions affect the quality education and the student health. The authors are developing a new HVAC system addressing the problems of noise and energy inefficiency. A prototype was operated in a relocatable classroom test-bed to characterize its performances. Then during one year, ten of the new HVAC systems are being monitored in parallel with the current standard HVAC systems in four schools in Northern and Southern California.

The distributions of air velocity, temperature and humidity are affected by the types and shapes of diffusers for supply air in an occupied zone. So it is important to select proper diffusers in the design procedure of the HVAC systems. The aim of that study is to propose a selection guide for a proper line diffuser in a room when perimetric heating load exists.

This paper focuses on the methods for an efficient use of upper openings in large space buildings in Shanghai International Gymnastics Stadium. A huge improvement of the energy saving is due to the use of natural ventilation.The results of the approach may instruct the design of the thermal environment and the effective operation of air-conditioning systems in large space buildings.

This paper discusses how to calculate the LCC (life cycle cost) for different indoor climate systems in typical Swedish buildings in the aim to help the client in choosing the most appropriate indoor climate system in a certain situation. Office buildings and residential buildings are considered, industrial buildings are not considered.
It would be interesting to extend the analysis to include the LCC for the entire building and not just the indoor climate system.

Urgently, bio-hazardous air cleaners had been developed in Taiwan hospital to control the Severe Acute Respirator Syndrome (SARS).The building up and the fuming gas decontamination of bio-hazardous air cleaners are illustrated in this paper along with the retrofitting of the HVAC system of respiratory isolation room.

To protect the workers from stress with radiation heat in workshops, a study of the environment thermal state has been carried out. A local air supply to the workplace was provided through an air shower located either above the workplace or close to its floor. Operating measurements of thermal conditions were made along with an evaluation by using the WBGT(wet bulb globe temperature) index.The results of measurements and flow visualization show that the upper air shower is more suitable than the lower one.The optimum local air supply for hot workshops has been designed.

For the investigation of the personalized ventilation efficiency and the study of human exposure in a displacement and mixing ventilated room, a seated computational thermal manikin with the geometry of a real human body has been used. A RNG k-e model with low Reynolds number has been used for the simulation.
The thermal plume around the human body plays a key role for the determination of the inhaled air quality.
According to the authors, the application of personalized ventilation is able to improve the inhaled air quality greatly.

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The vortex ventilator (VV) is a new concept of local exhaust ventilation system. In this paper the capture characteristics of the vortex ventilator are evaluated with both respect to the capture efficiency and to the capture velocity.3D CFD simulations are performed along with experiments using the tracer gas method with SF6.Comparison with the simple suction is made. The results of the VV are presented.