燃机计算说明1

燃气一蒸汽联合循环经济指标计算说明1.燃气一蒸汽联合循环机组的性能计算指标主要为压气机压缩比、压气机效率、燃气透平膨胀比、燃气透平效率、燃气轮机热耗量、燃气轮机热耗率、燃机效率、蒸燃功比、机组总有功功率、余热锅炉效率、联合循环综合厂用电率、直接厂用电率、联合循环机组热耗率和效率、机组发电标煤耗率、机组供电标煤耗率、机组发电油耗率、机组供电油耗率、凝汽器过冷度、端差和真空度、汽轮机热耗量、热耗率和效率、余热锅炉热端温差、余热锅炉节点温差。1.1压气机压缩比和压气机效率的计算。input测点（注意压力温度测点单位为英制单位需换算为国际单位）压气机进气温度COMPINAIRTK压气机进气压力COMPINAIRPMPa压气机排气温度COMPOUTAIRTK压气机排气压力COMPOUTAIRPMPa空气流量AIRFT/hConstant测点压缩过程比热比K11.4Output指标压气机压缩比COMPR压气机效率COMPEFF压气机压缩比COMPR=COMPOUTAIRP/COMPINAIRPA1=COMPR比热比K1选定为1.4（实际可以通过（COMPINAIRT+COMPOUTAIRT）/2和β=0查图得到）COMPEFF=(COMPINAIRT*pow(A1,(K1-1)/K1)-COMPINAIRT)/(COMPOUTAIRT-COMPINAIRT)*COMPINAIRT*pow(A1,(K1-1)/K1为压气机等熵压缩出口温度。1.2燃气透平膨胀比、燃气透平效率的计算。input测点（注意压力温度测点单位为英制单位需换算为国际单位）燃气轮机进气温度GASTBNINSTK燃气轮机进气压力GASTBNINSPMPa燃气轮机排气温度GASTBNEXHSTK燃气轮机排气压力GASTBNEXHSPMPaConstant测点膨胀过程比热比K21.33Output指标燃气透平膨胀比GASTBNR燃气透平效率GASTBNEFF透平膨胀比GASTBNR=GASTBNEXHSP/GASTBNINSP膨胀过程比热比K2选定为1.33（实际可以通过（GASTBNINST+GASTBNEXHST）/2和β=0查图得到）A2=GASTBNRGASTBNEFF=(GASTBNINST-GASTBNEXHST)/(GASTBNINST-GASTBNINST*pow(A2,(K2-1)/K2))*GASTBNINST*pow(A2,(K2-1)/K2)为透平等熵膨胀温度。1.3燃气轮机热耗量、燃气轮机热耗率、燃机效率、蒸燃功比和机组总有功功率input测点（注意压力温度测点单位为英制单位需换算为国际单位）1#燃机有功功率GASTBNLOAD1MW2#燃机有功功率GASTBNLOAD2MW汽机有功功率STMTBNLOADMW燃料流量FUELFT/h燃料低位发热量FUELLHVARKj/kgOutput指标燃气轮机热耗量STMGASTCMJ燃气轮机热耗率STMGASTCRKj/kwh燃机效率GASTBNEFF蒸燃功比STMGASB机组总有功功率GENLOADMW燃气轮机热耗量STMGASTC=FUELF*FUELLHVAR燃气轮机热耗率STMGASTCR=STMGASTC/(GASTBNLOAD1+GASTBNLOAD2)燃机效率GASTBNEFF=3600/STMGASTCR蒸燃功比STMGASB=STMTBNLOAD(GASTBNLOAD1+GASTBNLOAD2)机组总有功功率GENLOAD=STMTBNLOAD+GASTBNLOAD1+GASTBNLOAD21.4余热锅炉效率input测点（注意压力温度测点单位若为英制单位需换算为国际单位）锅炉进口烟气温度BLRINGTK锅炉排烟温度BLREXHGTK当地温度TLOCALKOutput指标余热锅炉效率HRSGEFF锅炉入口烟气平均定压比热Cpyr、锅炉出口烟气平均定压比热Cpyc、空气定压比热容Cpai、余热锅炉散热损失的保温系数φ=0.98考虑余热锅炉散热损失的保温系数HRSGEFF=(Cpyr*BLRINGT-Cpyc*BLREXHGT)/(Cpyr*BLRINGT-Cpai*TLOCAL)*φ简化计算公式：HRSGEFF=(BLRINGT-BLREXHGT)/(BLRINGT-TLOCAL)1.5联合循环综合厂用电率和直接厂用电率input测点（注意压力温度测点单位若为英制单位需换算为国际单位）1#燃机有功功率GASTBNLOAD1MW2#燃机有功功率GASTBNLOAD2MW汽机有功功率STMTBNLOADMW高厂变有功功率HOMELOADMW启备变有功功率STARLOADMW汽轮发电机励磁变有功功率STMTBNETLOADMW1#燃机励磁变有功功率GASTBNETLOAD1MW2#燃机励磁变有功功率GASTBNETLOAD2MWOutput指标联合循环综合厂用电率CCHOMEPCR联合循环直接厂用电率CCGENCR综合厂用电率CCHOMEPCR=(HOMELOAD+STARLOAD+STMTBNETLOAD+GASTBNETLOAD1+GASTBNETLOAD2)/(GASTBNLOAD1+GASTBNLOAD2+STMTBNLOAD)直接厂用电率CCGENCR=HOMELOAD/(GASTBNLOAD1+GASTBNLOAD2+STMTBNLOAD)1.6联合循环机组热耗率和效率input测点（注意压力温度测点单位若为英制单位需换算为国际单位）1#燃机有功功率GASTBNLOAD1MW2#燃机有功功率GASTBNLOAD2MW汽机有功功率STMTBNLOADMW燃料流量FUELFT/hFUELLHVAR燃料低位发热量Kj/kgOutput指标联合循环机组热耗率UNITTCVKj/kwh联合循环机组效率UNITEFF%机组发电标煤耗率GENSSCRg/kwh机组供电标煤耗率GENSCCRg/kwh机组发电标油耗率GENSSORg/kwh机组供电标油耗率GENSSORg/kwh标煤收到基低位发热量为29307.6kj/kgFUELLHVAR--燃料低位发热量机组热耗率UNITTCV=FUELF*FUELLHVAR/(GASTBNLOAD1+GASTBNLOAD2+STMTBNLOAD)/1000机组效率UNITEFF=3600/UNITTCV机组发电标煤耗率GENSSCR=UNITTCV/29307.6机组供电标煤耗率GENSCCR=GENSSCR/(1-CCHOMEPCR)机组发电标油耗率GENSSOR=FUELF/(GASTBNLOAD1+GASTBNLOAD2+STMTBNLOAD)*1000机组供电标油耗率GENSSOR=GENSSOR/(1-CCHOMEPCR)1.7凝汽器过冷度、端差和真空度input测点（注意压力温度测点单位若为英制单位需换算为国际单位）循环水入口温度CYCINWT℃循环水出口温度CYCOUTWT℃低压缸排汽压力LPCEXHSPMPa凝汽器出口水温度CNDOUTWT℃凝汽器真空CNDVACUUMMpa当地大气压PLOCALMPaOutput指标凝汽器过冷度CNDSCD℃凝汽器端差CNDTD℃循环水温升CYCWTUP℃凝汽器真空度CNDVACUUMDEG%凝汽器进汽压力对应的饱和温度CNDINSATST=P2T(LPCEXHSP)CNDSCD=CNDINSATST-CNDOUTWTCNDTD=CNDINSATST-CYCOUTWTCYCWTUP=CYCOUTWT-CYCINWTCNDVACUUMDEG=[1-(CNDVACUUMD+PLOCAL)/PLOCAL]*100%1.8汽轮机热耗量、热耗率和效率input测点（注意压力温度测点单位若为英制单位需换算为国际单位）主蒸汽流量HPMSFT/h主蒸汽压力HPMSPMPa主蒸汽温度HPMST℃余热锅炉给水流量BLRINWFT/h余热锅炉给水温度BLRINWT℃余热锅炉给水压力BLRINWPMPa汽机有功功率STMTBNLOADMWOutput指标汽轮机热耗量STMTBNTCMJ汽轮机热耗率STMTBNTCVKJ/kwh汽轮机效率TBNEFF主蒸汽焓值HPMSH、锅炉给水焓值BLRINWH。焓值根据IAPWS-IF97《水和水蒸气性质表》求得。STMTBNTC=HPMSF*HPMSH-BLRINWF*BLRINWHSTMTBNTCV=STMTBNTC/STMTBNLOADTBNEFF=3600/STMTBNTCV