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为了提高太阳能恒温沼气系统的太阳能利用率,给系统添加回热回质器,通过模拟新旧系统的换热过程,对新系统性能进行研究.根据兰州地区典型年最冷月气象资料计算的结果显示,新系统在30℃发酵条件下,回热回质器每天回热过程需要41min,可把进料系统中的水由5℃提升至17.5℃;添加回热回质器后系统每日能耗从229～259MJ降低到150～180MJ,回收热量2 436.2MJ,可节约太阳能集热器面积24.8m2,新系统能耗降低到原系统总能耗的67.7%.研究结果也适用于其他热源加热的恒温沼气系统.
In order to improve the solar energy utilization rate of the solar constant temperature biogas system and add the regenerative heat backer to the system, the new system performance is simulated by simulating the heat exchange process between the old and new systems.According to the coldest meteorological data of the typical year in Lanzhou, , The new system in the 30 ℃ fermentation conditions, back to the regenerator heat recovery process takes 41min every day, the feed system can be water from 5 ℃ to 17.5 ℃; add back to the heat backer system daily energy consumption From 229 ~ 259MJ reduced to 150 ~ 180MJ, heat recovery of 2 436.2MJ, solar collector area can be saved 24.8m2, the new system energy consumption reduced to 67.7% of the total system energy consumption.The results also apply to other heat source heating Thermostatic biogas system.