The Organic Rankine Cycle (ORC) technology is recognized to supply electricity from low temperature waste heat and solar energy sources. When the ORC system is heated by solar energy it uses two-fluids and two-loops, producing a relatively low thermal efficiency. To increase the ORC applicability, a solar energy assisted ORC system of single loop is proposed. The aim is to reduce the ORC heat transfer losses, minimize the equipment initial and maintenance cost and enhance the thermal efficiency. This is achieved by using bladder tanks which may improve drastically the ORC technical and economic performance. This method allows the heating to vary in the collector keeping the turbine inlet condition as a constant, impacting on the heat transfer losses and simplifying the configuration. The paper shows that an ORC of a single fluid can keep a constant turbine inlet despite the mass flow rate variations due to the suńs radiation incidence, therefore, reducing the risk of likely faults in the turbine caused by high frequency vibration. An ORC enhanced 10.54% thermal efficiency is obtained with 0.5 kg/s of R1233zd(E) and a pressure ratio = 5, powered by parabolic trough collectors to generate 10 kW during eight hours per day. The ORC competitiveness is dictated by a total generation cost of 54.3 $/MWh and the advantages of a single working-fluid single loop simplicity for overall configuration.

公认的有机朗肯循环（ORC）技术可从低温废热和太阳能源提供电力。当ORC系统被太阳能加热时，它使用两个流体和两个回路，产生相对较低的热效率。为了提高ORC的适用性，提出了一种太阳能辅助的单回路ORC系统。目的是减少ORC的传热损失，最小化设备的初始和维护成本，并提高热效率。这是通过使用可以大大提高ORC技术和经济性能的气囊罐来实现的。该方法允许收集器中的热量发生变化，从而使涡轮机的进气口条件保持恒定，从而影响传热损失并简化配置。本文表明，尽管由于辐射的入射而导致质量流量发生变化，但单一流体的ORC仍可保持恒定的涡轮入口，因此，降低了由高频振动引起的涡轮中可能出现故障的风险。通过使用0.5 kg / s的R1233zd（E）和压力比= 5，由抛物线形槽式集热器提供动力，可以在一天八小时内产生10 kW的能量，从而提高ORC的热效率，提高了10.54％。ORC的竞争力由总发电成本54.3 $ / MWh和单一工作流体单回路简化整体配置的优势所决定。在0.5 kg / s的R1233zd（E）和压力比= 5的情况下，由抛物线形槽式集热器提供动力，在每天8小时内产生10 kW的功率，可获得54％的热效率。ORC的竞争力由总发电成本54.3 $ / MWh和单一工作流体单回路简化整体配置的优势所决定。在0.5 kg / s的R1233zd（E）和压力比= 5的情况下，由抛物线形槽式集热器提供动力，在每天8小时内产生10 kW的功率，可获得54％的热效率。ORC的竞争力由总发电成本54.3 $ / MWh和单一工作流体单回路简化整体配置的优势所决定。