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根据国家标准GB1105 1-87《内燃机台架性能试验方法标准环境状况及功率、燃油消耗率和机油消耗率的规定》中的等过量空气法,结合内燃机典型变工况解析式及单压过热蒸汽余热锅炉变工况解析解,研究大气条件变化时,系统变工况性能。结果表明,大气压力p_0减小,内燃机相对输出功率(?)减小,相对燃油消耗率(?)增加,系统总能利用率Z减小,当量(?)效率η_(ex)、相对节能率FESR、经济(?)效率θ先增加后减小,存在最大值,在80 kPa左右取得最大值。大气温度t_O升高,(?)减小,(?)增加,Z、η_(ex)、FESR、θ增加。
According to the national standard GB1105 1-87 “bench test method for environmental performance standards and power, fuel consumption and oil consumption rate of” provisions of the excess air method, combined with the internal combustion engine typical variable working condition analytical and single-pressure superheated steam Analytical solution of variable temperature waste heat boiler to study changes in atmospheric conditions, the system performance changes. The results show that when the atmospheric pressure p_0 decreases, the relative output power (?) Of the internal combustion engine decreases, the relative fuel consumption rate (?) Increases, the total system utilization efficiency Z decreases, the equivalent (?) Efficiency η ex, FESR, the economy (?) Efficiency first increases and then decreases, with the maximum value reaching the maximum around 80 kPa. Atmospheric temperature t_O increases, (?) Decreases, (?) Increases, Z, η_ (ex), FESR, θ increases.