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首页> 外文会议>BSME International Conference on Thermal Engineering >Comparative 4-E Analysis of a Bottoming Pure NH_3 and NH_3-H_2O Mixture Based Power Cycle for Condenser Waste Heat Recovery
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Comparative 4-E Analysis of a Bottoming Pure NH_3 and NH_3-H_2O Mixture Based Power Cycle for Condenser Waste Heat Recovery

机译：用于冷凝器废热回收的底部纯NH_3和NH_3-H_2O混合物的底部纯NH_3和NH_3-H_2O混合物的比较4-E分析

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摘要

This paper proposes a comparative performance analysis based on 4-E (Energy, Exergy, Environment, and Economic) of a bottoming pure Ammonia (NH_3) based Organic Rankine Cycle (ORC) and Ammonia-water (NH_3-H_2O) based Kalina Cycle System 11(KCS 11) for additional power generation through condenser waste heat recovery integrated with a conventional 500MWe Subcritical coal-fired thermal power plant. A typical high-ash Indian coal is used for the analysis. The flow-sheet computer programme 'Cycle Tempo' is used to simulate both the cycles for thermodynamic performance analysis at different plant operating conditions. Thermodynamic analysis is done by varying different NH_3 mass fraction in KCS11 and at different turbine inlet pressure in both ORC and KCS11. Results show that the optimum operating pressure of ORC and KCS11 with NH_3 mass fraction of 0.90 are about 15 bar and 11.70 bar, respectively and more than 14 bar of operating pressure, the plant performance of ORC integrated power plant is higher than the KCS11 integrated power plant and the result is observed reverse below this pressure. The energy and exergy efficiencies of ORC cycle are higher than the KCS11 by about 0.903 % point and 16.605 % points, respectively under similar saturation vapour temperature at turbine inlet for both the cycles. Similarly, plant energy and exergy efficiencies of ORC based combined cycle power plant are increased by 0.460 % point and 0.420 % point, respectively over KCS11 based combined cycle power plant. Moreover, the reduction of CO_2 emission in ORC based combined cycle is about 3.23 t/hr which is about 1.5 times higher than the KCS11 based combined cycle power plant. Exergy destruction of the evaporator in ORC decreases with increase in operating pressure due to decrease in temperature difference of heat exchanging fluids. Exergy destruction rate in the evaporator of ORC is higher than KCS11 when the operating pressure of ORC reduces below 14 bar. This happens due to variable boiling temperature of NH_3-H_2O binary mixture in KCS11 and resulting in less irreversibility during the process of heat transfer. Levelized Cost of Electricity (LCoE) generation and the cost of implementation of ORC integrated power plant is about Rs.1.767/- per kWh and Rs. 2.187/- per kg of fuel saved, respectively whereas, the LCoE for KCS11 based combined power plant is slightly less than the ORC based combined cycle power plant and estimated as about Rs.1.734/- per kWh. The cost of implementation of KCS11 based combined cycle power plant is about Rs. 0.332/- per kg of fuel saved. Though the energy and exergy efficiencies of ORC is better than KCS11 but considering the huge investment for developing the combined cycle power plant based on ORC in comparison with KCS11 below the operating pressure of 14 bar, KCS11 is superior than NH_3 based ORC.
机译：本文提出了基于4-E（能量，漏洞，环境和经济）的基于纯氨（NH_3）的有机朗肯循环（ORC）和氨水（NH_3-H_2O）基于Kalina循环系统的比较性能分析11（KCS 11）用于通过冷凝器废热回收的额外发电，与传统的500MWE亚临界燃煤热电厂相结合。典型的高灰印度煤用于分析。流程图计算机程序“循环速度”用于模拟不同植物操作条件下热力学性能分析的循环。通过在KCS11中改变不同的NH_3质量分数和在兽人和KCS11中的不同涡轮机入口压力下改变不同的NH_3质量分数来完成热力学分析。结果表明，具有0.90的NH_3质量分数的ORC和KCS11的最佳工作压力为约15巴，11.70巴，分别超过14巴的操作压力，兽人集成电厂的植物性能高于KCS11集成电源植物和结果在该压力下方被逆转。 ORC循环的能量和漏极效率高于KCS11约0.903％和16.605％的点，分别在涡轮机入口的类似饱和蒸汽温度下进行循环。类似地，基于兽人的组合循环发电厂的植物能量和漏胀效率分别在基于KCS11的组合电力厂上增加了0.460％和0.420％的点。此外，基于ORC的组合循环中的CO_2发射的减少约为3.23T / HR，比比基于KCS11的组合循环发电厂高的1.5倍。由于热交换流体的温差降低，在兽人中蒸发器的蒸发器的破坏降低了降低。当ORC的操作压力降低到14巴以下时，ORC蒸发器中蒸发器中的蒸发器中的破坏率高于KCS11。这是由于KCS11中的NH_3-H_2O二元混合物的可变沸腾温度的沸腾温度，并且在传热过程中导致不可逆性更少。电力（LCoE）的稳定成本和ORC集成电厂的实施成本约为1.767 / - 每千瓦时和卢比。 2.187 / - 每千克燃料分别保存，而基于KCS11的组合电厂的LCoE略低于基于兽人的组合循环发电厂，并估计为每千瓦时的约1.734卢比。基于KCS11的组合循环发电厂的实施成本约为卢比。 0.332 / - 保存每千克燃料。虽然ORC的能量和漏洞效率优于KCS11，但考虑到基于ORC的基于ORC开发联合循环发电厂的巨额投资与低于14巴的操作压力，KCS11优于基于NH_3的ORC。

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