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首页> 外文期刊>Energy Conversion & Management >Thermodynamic analysis of heat driven Combined Cooling Heating and Power system (CCHP) with energy storage for long distance transmission
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Thermodynamic analysis of heat driven Combined Cooling Heating and Power system (CCHP) with energy storage for long distance transmission

机译：带长距离传输的储能的热力联合制冷供热系统（CCHP）的热力学分析

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摘要

The instability and intermittency feature of low grade heat sources and renewable energy brought about utilization problems, and in most cases, energy source site locates far away from energy demand site, how to implement long distance transmission of energy has been a challenge. To solve above problems, a novel combined power, cooling with solution energy storage and long distance heating/cooling system without heat preservation is proposed. The system integrates Kalina cycle with solution energy storage cycle, which is based on concentration difference of ammonia-strong, ammonia-weak solutions and liquid ammonia, and capable of changing operation modes flexibly according to heat sources and client needs. An analytical model is established and exergy destruction analysis is conducted to indicate exergy losses distribution of components. After optimization of proposed system, exergy efficiency is 0.57, and maximum solution energy storage density reaches 523 MJ/m(3). Furthermore, thermal energy is storaged in the form of latent heat, and the working fluids are transported under ambient temperature, therefore, thermal insulation are unnecessary, the maximum heat supply distance is 143 km, 15.7 times that of typical hot water transmission system, and pipe diameter is reduced to 3/20, pump work consumption and construction costs can be reduced dramatically as a consequence.
机译：低品位热源和可再生能源的不稳定和间歇性特征带来了利用问题，并且在大多数情况下，能源站点远离能源需求站点，如何实现能量的远距离传输一直是一个挑战。为了解决上述问题，提出了一种新颖的组合动力，具有溶液能量存储的冷却和不具有保温功能的长距离加热/冷却系统。该系统将Kalina循环与溶液能量存储循环相结合，该循环基于浓氨，弱氨溶液和液氨的浓度差异，并能够根据热源和客户需求灵活地更改操作模式。建立了分析模型，并进行了火用破坏分析，以显示组件的火用损失分布。经过对所提出系统的优化，火用效率为0.57，最大溶液能量存储密度达到523 MJ / m（3）。此外，热能以潜热的形式存储，并且工作流体在环境温度下传输，因此无需隔热，最大供热距离为143 km，是典型热水传输系统的15.7倍，并且管道直径减小到3/20，因此可以显着降低泵的工作量和建造成本。

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