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Thermodynamic, economic and environmental analyses of a novel solar energy driven small-scale combined cooling, heating and power system

机译：新型太阳能驱动小型冷却，加热电力系统的热力学，经济和环境分析

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摘要

A novel solar-driven compact and sustainable combined cooling, heating and power system is proposed to fulfill the energy demands of small buildings at remote locations and exergy, economic and environmental assessments are carried out. This system consists of evacuated tube collectors coupled with thermal energy storage, organic Rankine cycle, ejector refrigeration cycle and water heater to generate combined power, cooling and heating outputs. Exergy efficiency, cooling cost, heating cost, power cost, total cost per total output and equivalent carbon dioxide emission are selected as objective functions. Parametric studies are performed to observe the effect on objective functions by considering generator temperature, evaporator temperature, condenser temperature, pinch point temperature difference and turbine mass fraction as decision variables. The overall exergy efficiency, total cost rate and equivalent carbon dioxide emission are evaluated as 3.159%, 2023 $/yr and 13.10 tonnes, respectively. Increasing generator temperature or evaporator temperature increases exergy efficiency, CO2 emission and heating cost while decreases the cooling and power costs. Increasing condenser temperature decreases exergy efficiency, cooling and power costs while increases heating cost and CO2 emission. Increasing turbine mass fraction increases exergy efficiency, power cost and equivalent carbon dioxide emission, while decreases cooling cost and cooling-power cost ratio. Overall, the proposed CCHP system seems to be fit for cooling, heating and power production to meet the future generation energy demands.
机译：提出了一种新颖的太阳能驱动的紧凑型和可持续的组合冷却，加热和电力系统，以满足远程地点的小型建筑的能源需求，并进行经济和环境评估。该系统由抽空的管收集器组成，加上热能储存，有机朗肯循环，喷射器制冷循环和热水器，以产生组合电力，冷却和加热输出。优化效率，冷却成本，加热成本，功率成本，每种总产量总成本和等效的二氧化碳排放作为客观功能。通过考虑发电机温度，蒸发器温度，冷凝器温度，夹点温度差和涡轮质量分数作为决策变量，进行参数研究以观察目标功能的影响。总体高效效率，总成本率和等同的二氧化碳排放分别评估为3.159％，2023美元和13.10吨。增加发电机温度或蒸发器温度会增加高效效率，二氧化碳排放和加热成本，同时降低冷却和功率成本。增加冷凝器温度降低了高效率，冷却和功率成本，同时提高了加热成本和二氧化碳排放。增加涡轮质量分数增加了高效率，功率成本和等效二氧化碳排放，而降低了冷却成本和冷却功率成本比。总的来说，拟议的CCHP系统似乎适合冷却，加热和电力生产，以满足未来的发电能源需求。

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