| According to the air quality report of hundreds of Chinese cities, PM10 is the major infectant which affect Chinese cities' air quality. With the changing of people's lifeway and working style, people pay more attention to the problem of indoor's air quality. So the nation has come on a series of related standards. The emended national code for design of heating, ventilation and air conditioning (GB50019-2003) requests the admissible concentration should be under 0.15mg/m3. But the existing air conditioning system has no the set to purify the particle at all or the air purifying system is very simple that can not work. The study work about how to appraise the filtration fabric's purifying performance to PM10 has not begun and much creative work is in dire need. So this task will carry on the study timely.By adopting the TSI8520 DustTrakTM Aerosol Monitor and TSI8551 Q-Trak Indoor Air Quality Monitor, the author tested the air quality of some Shanghai public. The testing items include PM10, PM2.5, PM1.0, CO, CO2. The result of the data processing shows that PM10 is really the major infectant which affect cities' air quality.According the request of the code, the author designed a testing set which can test the filtration fabric's purifying performance to PM10. And by using the set, the author have tested many air conditioning filtration fabrics' purifying performance to PM10, PM2.5 and PM1.0, and picked up the better fibric from them.In order to extend the use of better filtration fabric, the task has found out the relations between the purifying performance and the air speed and the fix quantify by doing the experimentation. Using French chalk which was dried by the 120℃ air as the normal air model, the quality which the fabric contains particle can be test. Considering the fabric's reusing, the author has washed the fabric in many ways and compared the washed and unwashed fabrics' purifying performance testing datas.Through putting the fabric on the home air condition, the author analysed the effect to the air condition's runing and purifying performance.As a result, the electrostatic needle filtration fabric has higher purifying efficiency and lower resistance, but the purifying efficiency would decrease a lot after using scour, laundry powder, 84 disinfector and water to wash the fabric respectively. After putting the 150 mg/m3 electrostatic needle filtration fabric on the home air condition, the air condition's purifying efficiency can get to 71.0%~73.6 % and the resistance is 56~92Pa which is a little higher. And the blast air's speed becomes lower and the quality of ventilation becomes less which affect the air condition's work.In order to know about the relation between the indoor particle's concentration and time, the author educed a formula which shows the indoor particle's instantaneous concentration based on the indoor purifying model. The author also has analysed the relations between the indoor particle's concentration changing and some factors including the indoor particle's initialization concentration, outdoor particle's concentration, air speed,etc.Above all, by study this task would ground for the futher study of the filtration fabric's purifying performance to PM10 and it is also very valuable practicably and meaningful for society to solve the problem of indoor air quality and protect people's health.
|
PDF Full Text Request