2×(640–20)×0.1=39230.3kJ/h(7)其他热损失其他热损失为上诉热损失之和的10%~20%,故Q它=0.13(Q件+Q散+Q辅+Q溢)=0.13×(54495.98+17173.01+30294.43+39230.3)=18355.18kJ/h(8)热量总支出由式子(5–10)得Q总=Q件+Q辅+Q控+Q散+Q辐+Q溢+Q它=54495.98+17173.01+30294.43+39230.3+16294.95=157488.67KJ/h(9)炉子安装功率由式(5–11)P安=3600QaK?其中K为功率储备系数,本炉设计中K取1.4,则P安=360067.1574884.1?=61.2kW与标准炉子相比较,取炉子功率为kW。六、炉子热效率计算五.正常工作时的效率由式(5–12)η=总件QQ=54495.98/157488.67=51.3%六.在保温阶段,关闭炉门时的效率η=??溢辐总件QQQ??Q=??43.3029401.1717367.15748898.54495??=64.7%七、炉子空载功率计算P空=3600Q它散?Q=360001.1717318.18355?=9.87kW八、空炉升温时间计算由于所设计炉子的耐火层结构相似,而保温层蓄热较少,为简化计算,将炉墙及炉顶按相同数据计算,炉底由于砌砖方法不同,进行单独计算,因升温时炉底板也随炉升温,也要计算在内。1.炉墙及炉顶蓄热V侧黏=2×[1.509×(15×0.067+0.135)×0.115]=0.326m3V后前黏?=2×[(0.869+0.115×2)×(16×0.067+0.135)×0.115]=0.305m3V顶黏=0.97×(1.509+0.276)×0.115=0.199m3V侧纤=2×[(1.509+0.115)×(15×0.067+0.135)×0.080]=0.244m3