ZHANG Renping, LIU jiang
(School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China)

Abstract: With the development of the national "energy-saving emission reduction planning in 13th Five-Year, ceramic enterprise energysaving emission reduction situation is very serious. The rational use of the waste heat from the flue gas of the ceramic kiln plays a very important role in the energy saving and emission reduction of the ceramic enterprises. Driven by the organic Rankine cycle using ceramic flue gas waste heat, waste heat cascade can achieve its efficient application. To aim for the utilization of 100 ℃-150 ℃ waste heat efficient step using, and comprehensive consideration of the thermophysical properties, safety and environmental impacts of organic compound. R123, R141b, R245fa, R245c, R601 and R601 are selected as working substance. The effects of heat source temperature on the system performance are studied. It is indicated that R600 has the highest net power, yet its thermal efficiency is the lowest and the evaporation pressure is higher; R11 has the highest thermal efficiency and moderate evaporation pressure, but its net power is lower; R141b has higher cycle net power and thermal efficiency, and its evaporation pressure is lower, it is the ideal organic Rankine cycle working medium within this temperature zone.

Key words: kiln; waste heat; organic rankine cycle; performance analysis