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首页> 外文期刊>Iranian Journal of Science and Technology, Transactions of Mechanical Engineering >Performance Analysis of Custom-Designed Heat Exchanger and Latent Heat Thermal Energy Storage System for Diesel Engine Exhaust Waste Recovery System
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Performance Analysis of Custom-Designed Heat Exchanger and Latent Heat Thermal Energy Storage System for Diesel Engine Exhaust Waste Recovery System

机译：用于柴油机排气废物回收系统的定制设计热交换器和潜热能存储系统的性能分析

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The current study presents an experimental analysis of a custom-designed heat exchanger (CDHX), for recovering the waste heat energy of the exhaust gas from a stationary diesel engine. It has triangular external finned tubular construction with its shell flue side fitted with segmental baffles sloped at 20 degrees, to effectively extract heat to raise the tube side circulating thermal oil temperature for sensible heat rise. This, in closed loop, transfers the heat to non-moving, sealed and filled thermal storage system with phase change material (PCM) as the latent heat energy. From the third closed loop circulating water from the thermal storage, it indirectly supplies the heat for steady and peak state process consumptions. Balmerol prototherm medium heat transfer oil and water circulations are used as the respective heat extraction liquid media during the charging and discharging process, with PCM at varied levels of molten conditions. The temperature rise behavior of the heat transfer fluid in the CDHX under different load conditions of the engine is studied. The thermal performance analysis of the CDHX has been evaluated using effectiveness and heat extraction rates. The behavior of PCM temperature in the latent heat thermal energy storage (LHTES) tank during charging and discharging process is studied. The evaluation of the performance of the LHTES system has been analyzed by estimating the charging rate with increased melted liquid and latent heat energy stored during the charging process and discharging rate of PCM during solidification process. It is found that nearly 53-60% of stored material latent heat energy is recovered from the PCM in the LHTES tank. It is used by closed loop hot water circulation during discharging process for steady-state drying of food products to reduce the gap between demand and supply of energy. The maximum heat extraction rate of the CDHX integrated with LHTES tank is 3.9kW, and the charging rate in the LHTES tank is 1.550kW at full-load condition of the engine. At the flow rate of water of 6 lpm, the maximum heat discharge rate of PCM in the LHTES tank is 0.710kW and it decreases to 0.58 and 0.47kW for reduced 4 and 2 lpm flows, respectively. The water temperature that rises nearly 72 degrees C during discharging process of LHTES tank for 70-min duration achieved at the flow rate of 6 lpm.
机译：目前的研究提出了一种定制设计的热交换器（CDHX）的实验分析，用于从固定柴油发动机中回收废气的废热能量。它具有三角形外部翅片管结构，壳烟道侧配有20度倾斜的节段挡板，有效提取热量以提高管侧循环热油温以获得明智的热量升高。在闭环中，这将热量与相变材料（PCM）转移到非移动，密封和填充的热存储系统，作为潜热能。从第三个闭环循环水从热储存，间接供应稳态和峰态过程消耗的热量。 BALMOLOL PROTETHETM中等传热油和水循环用作充电和放电过程中的各种散热液体介质，PCM在不同水平的熔融条件下。研究了在发动机的不同载荷条件下CDHX中传热流体的温度上升行为。使用有效性和热提取速率评估CDHX的热性能分析。研究了在充电和放电过程中潜热热能存储（LHTES）罐中PCM温度的行为。通过在凝固过程中估计在充电过程中储存的增加的熔化液和潜热能和PCM的放电速率，通过估计充电率来分析对LHTES系统的性能的评价。发现从LHTES罐中的PCM回收近53-60％的储存材料潜热能。闭环热水循环在放电过程中用于稳态干燥食品的稳态干燥，以降低能量需求与供应之间的差距。与LHTES罐集成的CDHX的最大热提取率为3.9kW，发动机的全负荷条件下LHTES罐中的充电率为1.550kW。在6LPM的水的流速下，LHTES罐中PCM的最大排水速率为0.710kW，减少至0.58和0.47k，分别减少4和2LPM流动。在LHTES罐的放电过程中升高72℃的水温，以6LPm的流速实现70分钟的持续时间。

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