太阳能光伏-内燃机发电及余热利用系统热力学分析  

Thermodynamic analysis of a solar photovoltaic-internal combustion engine power generation and waste heat utilization system

作　　者：贾俊曦[1] 涂茂林 JIA Jun-xi;TU Mao-lin

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《节能》2023年第10期13-16,共4页Energy Conservation

摘　　要：对利用太阳能和生物质能的联合冷热电系统(CCHP)进行热力学分析。系统由内燃机和太阳能光伏电池供电,由吸收式制冷及热水系统进行余热回收。太阳能光伏电池采用五参数模型,内燃机为零维、单区模型。分析转速和压比对内燃机输出功率、排气排放物和气缸内传热的影响。结果显示:太阳能光伏电池效率为14%,日发电量500 kWh;内燃机热效率可以达到37%。转速提高后,整体CCHP电效率提高2.8%,余热利用效率提高10%。内燃机的压缩比增大后,CCHP电效率增大0.52%,整体冷热电效率几乎不变。整个CCHP系统电效率为20%,冷热电联合效率可以达到40%。Thermodynamic analysis of combined systems of cooling,heating and power(CCHP)using solar and biomass energy is conducted.The system is powered by an internal combustion engine and solar photovoltaic cells,and waste heat is recovered by absorption refrigeration and hot water systems.The solar photovoltaic cell adopts a five-parameter model,and the internal combustion engine is a zero-dimensional single-zone model.The effects of speed and pressure ratio on internal combustion engine output,exhaust emissions and heat transfer in cylinders are analyzed.The results show that the solar photovoltaic cell efficiency is 14%,and the daily power generation is 500 kWh.The thermal efficiency of the internal combustion engine can reach 37%.As the speed increased,the overall CCHP electrical efficiency is increased by 2.8%,and the waste heat utilization efficiency is increased by 10%.As the compression ratio of the internal combustion engine increases,the CCHP electric efficiency is increases by 0.52%,and the overall cooling and heating electric efficiency is almost unchanged.The electrical efficiency of the entire CCHP system is 20%,and the combined efficiency of cooling,heating and power can reach 40%.

关 键 词：太阳能光伏 生物质气化 内燃机 吸收式制冷 联合冷热电系统 

分 类 号：TM615[电气工程—电力系统及自动化]