Effects of extreme environment temperatures and pressures on the performance of diesel-burner heating system by the response surface method
Due to the vast territory and large environmental differences in different regions,it is important to explore the complex environmental adaptability of heating systems to guarantee the diet reliability.The thermal efficiency,heat transfer intensity,heat flow uniformity and CO emission variation of the heating system were explored under different conditions for a newly developed electrically controlled diesel heating system.The pressure-temperature two-factor response surface(RSM)method was used to reveal the adaptation performance of the system.The results show that the ambient temperature mainly affects the heat loss and combustion intensity while the environmental pressure mainly affects the mixing of fuel and gas,as well as the scour at the bottom of flue gas.The overall performance of the whole heating system weakens with the decreasing ambient temperature,while the decreasing environmental pressure first benefits and then weakens the comprehensive performance where the best performance occurs around 75.0 kPa.When ambient temperature and pressure is between-40-40 ℃ and 60.0-101.0 kPa,the environmental adaptive index varies less than 15％,indicating that the developed combustion heating system shares a high ability to the complex environments.
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