共查询到17条相似文献,搜索用时 187 毫秒
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针对沥青搅拌站除尘器余热再利用,以热泵技术与原理为基础,提出了采用溴化锂为工质,以电加热或导热油加热两种方式进行余热回收的余热回收方案,并对方案进行了分析,可为搅拌站余热再利用提供借鉴。 相似文献
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烟气余热回收是指一项新型高效的余热利用回收技术,依靠吸收电泳车间电泳烘干室烘道废气余热预热进燃烧室的新风。作为一种新型高效的余热利用技术,可为企业节省能源的消耗,从而节省大量的成本。 相似文献
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空压机余热回收是指一项新型高效的余热利用回收技术,依靠吸收空压机运行时产生的废热使水加热,再将加热的水用于员工的生活、工业用所需,没有太大的能源消耗。作为一种新型高效的余热利用技术,可以为企业节省能源的消耗,从而节省大量的成本。 相似文献
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在实际生产中,烘干设备的供热系统和废气处理系统的烟气排放热损失约占总能耗的25%,而这部分被排放的烟气仍然存在着能量回收的契机.对低温排放的烟气进行余热回收和利用,是涉及烘干设备、公用动力系统、其它区域耗能设备等综合性很强的系统节能技术,是汽车涂装车间能源综合利用的典型课题. 相似文献
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汽车尾气温度高,带走的热量约占发动机总能量的40%,温差发电技术能直接将废热能量转化为电能回收利用。文章介绍了汽车排气废热温差发电系统的输入输出特性,探讨了影响系统发电效率的相关因素,并提出改进措施。经过一系列试验验证及理论研究表明,系统效率受废热通道内部结构、热电模块拓扑结构以及热电模块自身性能的影响。提出的改进方案提高了温差发电系统的热效率。 相似文献
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K. -B. Kim K. -W. Choi K. -H. Lee 《International Journal of Automotive Technology》2012,13(3):401-407
A relatively new approach for improving fuel economy and automotive engine performance involves the use of automotive combined
cycle generation technologies. The combined cycle generation, a process widely used in existing power plants, has become a
viable option for automotive applications due to advances in materials science, nanotechnology, and MEMS (Mico-Electro Mechanical
Systems) devices. The waste heat generated from automotive engine exhaust and coolant is a feasible heat source for a combined
cycle generation system, which is basically a Rankine cycle in the context of this study. However, there are still numerous
technical issues that need to be solved before the technology can be implemented in automobiles. A simulation was performed
to examine the amount of waste energy that could be recovered through the use of a combined cycle system. A simulation model
of the Rankine cycle was developed using Cycle-Tempo software. The simulation model was ultimately used to evaluate the rate
of waste heat recovery and the consequential increase in the overall thermal efficiency of the engine with the combined cycle
generation system under typical engine operating conditions. The most effective automotive combined cycle system recovered
68% of the waste heat from the exhaust and coolant, resulting in a 6% improvement in engine efficiency. The results are expected
to be beneficial for evaluating the feasibility of combined cycle generation systems in automotive applications. 相似文献
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为了提高并联式混合动力汽车发动机和动力电池低温生存能力,探索发动机与电池冷却余热资源的利用新途径,提出了一种基于余热再利用的发动机和动力电池双向循环低温预热的新方法.建立发动机和动力电池余热数值模型,定量分析和研究余热系统的温升特点与温度分布状况,揭示了发动机与动力电池余热的传热规律,设计了基于相变材料的自动双向热控装... 相似文献
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基于双有机朗肯循环的 CNG 发动机余热回收系统参数优化及工质选择 总被引:1,自引:0,他引:1
为了充分利用 CNG 发动机的余热能量,根据 CNG 发动机的余热能分布特性设计了双有机朗肯循环系统,用来回收 CNG 发动机的排气能量、进气中冷能量以及冷却系统具有的能量。该双有机朗肯循环系统包括高温循环和低温循环,高温循环采用 R245fa 作为工质,用于回收 CNG 发动机排气能量;低温循环分别采用 R245fa , R1234ze 和 R1234yf 作为工质,用于回收进气中冷能量、高温循环冷凝过程中释放的能量以及发动机冷却系统的能量。在 CNG 发动机标定工况下,对双有机朗肯循环系统的参数敏感度进行了分析。结果表明:较高的高温循环蒸发压力和低温循环蒸发温度,较低的高温循环冷凝温度和低温循环冷凝温度可以提升双 ORC 系统的净输出功率和热效率;高、低温循环均选择 R245fa 的方案可以使系统具有较优的热力学性能。 相似文献
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Hyung Seok Heo Suk Jung Bae Sung Mok Hong Seung Uk Park 《International Journal of Automotive Technology》2018,19(2):221-231
Although fuel cost has been the largest portion of annual operating costs of construction equipment, it is possible to save the energy and reduce cost using fuel economy enhancement technology. In this study, an organic Rankine cycle is applied to an excavator in order to recover waste heat, reproduce it into electrical energy, and consequently reduce the fuel consumption by 10 %. A design process was carried out to develop an exhaust gas superheater that recovers the waste heat from exhaust gas through a composite-dimensional thermal flow analysis. A one-dimensional code was developed to perform a size design for the exhaust gas superheater. The ranges for the major design parameters were determined to satisfy the target of the heat recovery, as well as the pressure drop at both fluid sides. Performance analysis was done through onedimensional design code results, which were compared with three-dimensional CFD analysis. By utilizing a 3D commercial code, the arrangement of the tubes was selected and the working fluid pressure drop was reduced through a detailed layout design. The design procedure was verified by a performance evaluation of the prototype, which yielded only a 7 % tolerance in heat recovery. 相似文献