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1、燃气轮机为基础的联供系统模型Gas Turbine一定有业内普遍承认的模型。调研在连供系统中Gas turbine的建模情况,以及所做的假设或需考虑的因素。CHP/DH system(district heating)在Parand和Rudeshur分别有一家发电厂,每个发电厂都用Gas Turbine发电。此系统目的是利用Gas Turbine的余热来满足Parand不断变化的HVAC负荷。同时,利用其余的热势能驱动steam turbine环。CHP/DH system(district heating)如图,是余热回收系统。从燃气轮机排出的废气会进入HRSG或者流入bypass stuc
2、k。而HRSG产出的蒸汽将有两种途径:提供给区域供暖网络(s6:LP steam,280C,35 bar)。为 涡 轮 机 提 供 蒸 汽 (s5:HP steam,520C,95 bar)。如图,GT中回收的一部分高温蒸汽通过减温器转换为25 bar的蒸汽后,再通过冷热交换机转换为的185的热水。而后降至132以供需求侧用户供暖利用。The system is simulated based on the operating performance maps and performance characteristics of main components.CHP/DH system(di
3、strict heating)Operating performance maps and performance characteristicsMultiobjective optimization of a combined heat and power(CHP)system for heating purpose in a paper mill using evolutionary algorithmGas turbine performance-what makes the map?Gas turbine performance mapsTri-generation water-coo
4、led air conditioning system系统中的原动机可以是SOFC,GT或MGT。发出的电能驱动压缩式制冷机,与此同时废气中的热能用于溴化锂吸收式制冷机的运行来增加制冷。系统中冷却能力将用于住宅的制冷空调。如图所示,第一步,水水将在吸收式制冷机的蒸发器中冷却,它的温度会下降。下一步,它会通过压缩式制冷机的蒸发器,然后达到目标温度。随后,被冷却的水将被送到建筑的风机风机盘管,盘管,其间会通过循环的管道来冷却整个建筑。为了回收制冷器无法吸收的热能,冷却水通过两个平行的管道被同时输送到吸收和压缩系统。在吸收式制冷机中,吸收塔和冷凝器将被分别冷却。冷却水通过吸收塔和冷凝器时,温度升高。
5、最终,这些冷却水由冷却塔来回收。Tri-generation water-cooled air conditioning system上图利用能量和平衡公式,对系统中的每一个部件都进行了详细的建模。但是,由于要研究不同的原动机,研究人员建立了一个用来模拟驱动单元的整体模型。其目的时用来计算消耗的能量。整个系统的输入能量形式是动能(WSupply)和热能(QSupply)。WSupply的数值是所有压缩机、泵和风扇所需要的电能的总和。QSupply的数值是原动机耗能(QIN)和WSupply的差值。提供的热量一部分用于发动机,其余的则通过废气管道丢弃了。平衡是热动力学第一与第二理论的结合。在分析
6、中,加热时间效率与功率时间效率在数值上并不相同,其中的损耗代表了真正的做功损耗。质量守恒定律能量守恒定律能平衡方程出自A.Bejan,G.Tsatsaronis,M.Moran的Thermal design and optimization,第三章,121-131页。Tri-generation water-cooled air conditioning systemIn order to compare the quantity of energy consumption in different systems,energy energy utilization utilization f
7、actor factor(EUF)has been defined as the ratio of the gained energy to the supplied energy 15.In order to compare the EUF of the hybrid system with that of a single generation system,a base system has been defined as the combination of the driving unit and a compression chiller.EUFb indicates the en
8、ergy utilization factor of the base system.So the improvement in the energy utilization of a hybrid system can be defined as EUFpare the quality of the energy utilization,the second law efficiency can be used.This efficiency,in general,is defined as the ratio of the recovered exergy to the supplied exergy.Therefore,the second law efficiency for the system isExergo-environmental analysis of an integrated organic Rankine cycle for trigeneration