Calculation of cooling curve of the combustion boiler refractories lining with use of an experimental device

Abstract

The aim of the work was modeling of cooling process dynamics of a combustion boiler and designing of the method, which is suitable for calculation of cooling time in a large scale of temperature. Methods were verified with the use of referential combustion boiler with heat output of 130 kW. This boiler burned mixture of waste sawdust and shavings originating in the course of production of wooden furniture. For these purposes specialized experimental device has been used. Cooling curves were measured in interval from 380 °C to 50 °C and were described by using of polynomial function. The cooling time was calculated by using of polynomial function in full temperature scale for cooling of combustion boiler refractories lining, from 700 °C to 50 °C.

Keywords

• cooling curve
• combustion boiler
• refractories lining
• heat transfer coefficient