By Zhonglin Xu, Bin Zhou
This ebook offers novel layout ideas and applied sciences for dynamic isolation in line with experimental experiences. those methods have now develop into the neighborhood regular in Beijing and are presently being promoted to be used national. extra, the ebook presents information of measures and guidance for the layout strategy. Departing from the conventional knowing that isolation wards will be designed with excessive unfavourable strain, hermetic doorways and clean air, it establishes the foundation for designing organic fresh rooms, together with isolation wards, utilizing an easy and handy clinical approach.
This booklet is meant for designers, engineers, researchers, sanatorium administration employees and graduate scholars in heating air flow air con (HVAC), air cleansing applied sciences and comparable areas.
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Extra info for Dynamic Isolation Technologies in Negative Pressure Isolation Wards
After the door is open, convective flow occurs under the influence of temperature difference. Indoor cold air flows outwardly through the upper region of the door opening, so there must be the same amount of cold air flowing inwardly through the lower region of the door opening. This can provide the balance between the air change rate and the pressure difference. In this case, we obtain: 38 2 Three Misunderstandings for Design of Negative Pressure Ward Q4 ¼ Q5 ð2:3Þ For pure convective flow by temperature difference, the principle of natural ventilation works.
It is feasible to adopt the common value 5 Pa. The reason why the pressure difference +5 Pa is adopted in common cleanroom will be introduced. One is that it can meet the requirement. 5 mm H2O. 5 mm. 5 Pa. No. 1 operating room at Zhengzhou people’s hospital No. , Ltd No. , Ltd. , Ltd. , Ltd. , Ltd. No. 1 operating room at Binzhou people’s hospital 1 4 Location No. 1 Proper Pressure Difference for Isolation 57 For the purpose of automatic control, in order to prevent too much instantaneous fluctuation of the pressure difference, it is impossible to maintain 5 Pa, so it is possible to use 10 Pa.
The dynamic isolation is relative to the static isolation which means the application of the barrier (such as closing the air-proof door) and the static pressure difference to prevent leakage through gap. This concept has been adopted by Beijing local standard DB11/663-2009 “Essential construction requirements of negative pressure isolation wards”. It has also been applied in the design and the construction of negative pressure isolation ward in different places. 1 Proper Pressure Difference for Isolation According to the principle of air cleaning technology, the purpose of isolation is to prevent infection and cross infection.