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| Greenhouse hot blast heating based on porous pipes |
| Wang Xinkun, Xu Ying, Gao Shikai, Xia Liping |
| (Research Center of Fluid Machinery Engineering and Technology， Jiangsu University， Zhenjiang， Jiangsu 212013， China) |
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Abstract In order to verify the function of greenhouse hot blast heating testsystem based on porous pipes, the heating process was studied with inlet temperature, inlet pressure and outlet diameter of porous pipes as testing factors. Through thermal insulating porous pipes, measuring the temperature rise in thermal insulated room, the hot blast heating process was tested and analyzed under different testing factors. Measured data was polynomial regressed so as to obtain the mathematic relation between the temperature rise in thermal insulated room and inlet temperature, inlet pressure of porous pipes. The test results indicate that the temperature in thermal insulated room rises about 4 degrees Celsius to 9 degrees Celsius, the relations between temperature rise and inlet temperature, inlet pressure of porous pipes are positive correlation, and the main influencing factor of the temperature rise is inlet pressure rather than inlet temperature. Under the set influencing factors according to mathematic relations determined by testing and analysis, the system is applicable for heating greenhouse in winter.
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Received: 09 May 2011
Published: 30 September 2011
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