Effects of Small Disturbances Caused by Changes of Surrounding Conditions on the Small Positive Pressure Control System of the CEEF 1999-01-1985
The closed ecology experiment facility (CEEF) has a small positive pressure control system consisting of rubber buffers and a mechanical subsystem. In the present study, effects of small temperature disturbances caused by changes of surrounding conditions on the pressure control system are investigated experimentally and in numerical simulations. Though solar radiation causes a pressure disturbance in the facility, choosing the proper diameter of ducts which connect the rubber buffers to the modules, the rubber buffers can follow fluctuations of low frequency, like daily atmospheric fluctuations and pressure changes caused by temperature control of the facility’s air conditioners, and can cut off those of high frequency due to changes of environmental conditions.
Citation: Nakano, S., Sugawara, S., Otsubo, K., and Nitta, K., "Effects of Small Disturbances Caused by Changes of Surrounding Conditions on the Small Positive Pressure Control System of the CEEF," SAE Technical Paper 1999-01-1985, 1999, https://doi.org/10.4271/1999-01-1985. Download Citation
Susumu Nakano, Satoshi Sugawara, Koji Otsubo, Keiji Nitta
Hitachi, Ltd., Institute for Environmental Sciences
International Conference On Environmental Systems