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在曼谷一家日产360吨玻璃的玻璃厂进行了热能利用研究、热能利用审计和能耗分项统计,对该厂耗能最多的设备—熔化炉进行了能量及其有效性分析。测定出熔化炉的热力学第一定律和第二定律率分别为18.2～20.2％和13.3～14.5％,主要能量损失包括随干烟道气损失15.6％、经辐射及其它途径损失33.7％。 分析了各种节能措施的可行性,利用烟道气余热代替电网动力电加热以降低燃油粘度,每年可节省约45200美元。根据2年偿付期及9％的年利率,估算了烟道气油加热器的最大允许费用。也调查了建立一个发电系统的可行性。该系统的偿付期不会超过4年,年利率亦为9％。若假定该系统的使用期为20年,则其投资的年回收率将达约32％。
In a glass plant with a daily output of 360 tons of glass in Bangkok, thermal energy utilization studies, thermal energy utilization audits, and energy consumption statistics were performed, and the energy and effectiveness of the melting furnace, the most energy-consuming equipment in the plant, were analyzed. The first law and the second law of thermodynamics for the melting furnace were determined to be 18.2% to 20.2% and 13.3% to 14.5%, respectively. The main energy losses included 15.6% loss with dry flue gas and 33.7% loss with radiation and other routes. Analyzed the feasibility of various energy-saving measures, using flue gas waste heat instead of power grid electric heating to reduce fuel viscosity, saving about 45,200 US dollars per year. Based on the 2-year repayment period and the annual interest rate of 9%, the maximum allowable cost of the flue gas oil heater was estimated. It also investigated the feasibility of establishing a power generation system. The solvency period of the system will not exceed 4 years and the annual interest rate will also be 9%. Assuming that the system’s use period is 20 years, the annual recovery rate of its investment will be about 32%.