The Investigation On Thermal And Waterish Environment Of Displacement Ventilation

There has been a considerable attention to energy consumption and indoor air quality ( IAQ) problem in recent years.As a new and environmental-friendly HVAC design with special air flow, displacement ventilation can both ensure the indoor air quality and have relatively small energy consumption.As a result,it can solve the two problems to some degree. As for the principle of displacement ventilation, it seems simple,but when come to its mechanism it is complicated,there are a lot of in fluence factors.How on earth its factors affect of indoor thermal and waterish environment needs deepr esearch.It is the valuable base in the design of thermal and waterish environment and HVAC.Scientific investigation on thermal and waterish environment of displacement ventilation and the issue of thermal environment are presented in this paper.This paper selected computational fluid mechanics software airpak to simulate displacement ventilation.To simulate a standard office, temperature,speed and PMV-PPD index were investigate in thermal environment of displacement ventilation.This paper simulate the affect of different blast speed and height to the thermal ventilation of displacement ventilation.The delamination of humidity in displacement ventilation were analysed .The paper discussed the affect of waterish intensity to humidity.In this paper,Multi-objective evaluation method is used to assess the character of displacement ventilation system.T he result of comprehensive evaluation is obtained by analyzing five factors related to the three indexes.T hen the optimal project is provided to meet the three indexes of thermal comfort, indoor air quality(IAQ) and energy consumption.