近年来,先进绝热压缩空气储能(Advanced adiabatic compressed air energy storage,AA-CAES)得到了学术界及工业界的广泛关注,并可与制冷和制热系统耦合,以同时输出电力、冷量以及热量.然而,该系统需要额外的制冷和制热设备,系统复杂且成本较高.对此,文章提出了基于AA-CAES,通过控制透平出口温度和压力,得到冷空气以直接进行供冷,同时利用多余的储热水以间接进行生活热水供应,从而实现系统的冷热电联供.为了分析冷热电联供系统性能,文章建立了相应的热力模型,并在给定工况下计算了系统参数.结果表明,相比AA-CAES发电系统,AA-CAES冷热电联供系统总发电量减少了28.57 MWh,但得到了31.64 MWh的总供冷量和65.50 MWh的总供热量,系统能源利用率(Energy efficiency ratio,EER)提升至70.31％,实现了系统能源利用率的进一步提高.此外,系统关键参数的分析表明,压缩机出口温度和储气库最低压力对系统影响程度更大,随着压缩机出口温度的增大,EER从24.41％增大至75.25％,变化曲线逐渐由陡变缓;而储气库最低压力每升高1 MPa,EER增大2.37％.
Performance analysis of combined cooling heating and power system based on advanced adiabatic compressed air energy storage
In recent years,advanced adiabatic compressed air energy storage (AA-CAES)has gained much attention in academia and industry.AA-CAES can be coupled with cooling and heating systems to provide power,cooling and heat simultaneously. However,the system requires additional cooling and heating equipment,making it com-plex and costly.Thereby,the combined cooling heating and power system based on AA-CAES is proposed.On the basis of energy storage and power generation,by controlling the outlet temperature and pressure of turbines,cold air can be obtained for direct cooling and the excess stored hot water can be used for indirect domestic hot water supply.To an-alyse the system performances,the corresponding thermodynamic models are developed and the system parameters are calculated under the given operating conditions.The results show that,compared to the AA-CAES based power generation system,the total genera-ted electricity of AA-CAES based combined cooling heating and power system is reduced by 28.57 MWh,but the total cooling capacity of 31.64 MWh and total heating capacity of 65.50 MWh are obtained.Meanwhile,the energy efficiency ratio (EER)of the system is increased to 70.31％,which achieves a further improvement in the system energy efficiency.Furthermore,the analysis of the key parameters shows that,the compressor outlet temperature and the minimum air storage pressure have a greater impact on the sys-tem.With the increase of the compressor outlet temperature,the EER increases from 24.41％ to 75.25％,and the curve gradually changes from steep to slow.When the mini-mum air storage pressure increases by 1 MPa,the EER increases by 2.37％.
advanced adiabatic compressed air energy storagecombined cooling heating and powerperformance analysis
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