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A Study on the Exhaust Heat Recovery Technology of Heat Pipe Used in the Conventional Wood Drying Room

Author: YaoXueLi
Tutor: YiSongLin
School: Beijing Forestry University
Course: Wood Science and Technology
Keywords: Wood drying Heat pipe heat exchanger Wick Waste heat recovery
CLC: S782.31
Type: Master's thesis
Year: 2010
Downloads: 40
Quote: 1
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Abstract


Wood drying is the most important step of the process in the production of wood products , energy consumption accounts for 40-70% of the total energy consumption of the production of wood products , which accounted for about 15-40% of the total energy by wicks away moisture and heat away , therefore wicks away moisture and heat recovery and more and more people's attention . Firstly, the design and calculation of the heat pipe heat exchanger from the start , the exhaust heat recovery technology for conventional wood drying chamber structures typical wick heat pipe heat exchanger for heat recovery unit test bench , and through timber conventional drying chamber exhaust conditions simulation, comparative analysis of the different conditions wick heat pipe heat exchanger , heat recovery efficiency , the theory predicts that the device used for timber conventional drying chamber exhaust heat recovery efficiency . The study results show that : ( 1 ) when the hot end of the inlet temperature and relative humidity are constant , the average heat recovery rate decreases and then increases with increasing velocity . (2) When the flow rate and the inlet temperature of the hot side of a certain time , heat recovery , with increasing relative humidity is increased ; hot side outlet temperature close to the dew point temperature of the heat recovery is maximized. (3 ) When the flow rate and the relative humidity of the hot end of a certain time , the heat recovery , as the hot end of the inlet temperature increases and decreases ; hot side outlet temperature close to the dew point temperature of the heat recovery reaches the maximum . (4) low - velocity segment of 1m / s 2m / s average heat recovery as the flow rate increases and decreases, the high-velocity segment 3m / s 4m / s , the average efficiency of the heat recovery as the flow rate increases decreases and then increases . The average efficiency of the heat recovery heat exchanger is as follows : 32.93% , 31.37% , 37.23% , 30.07% , and are up more than 30% . ( 5 ) Group 2 heat pipe heat exchanger to achieve the effect of the heat recovery and the best economic benefits

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CLC: > Agricultural Sciences > Forestry > Forest harvesting and utilization > Timber mining transport to school > Storage timber and custody > Wood Drying
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