The ORC fluid can be classified into three categories according to the temperature-entropy (T – s) diagrams. It is noteworthy that for some kinds of fluids, the derivative of temperature with respect to entropy on the saturation vapor curve may change from positive value to negative value, e. g. dL of R123 on the saturation […]

Figure 1 presents the diagram of low-temperature solar thermal electric generation with two – stage collectors and heat storage units. The system consists of FPC and CPC collectors, heat storage, and ORC subsystem. FPCs offer the advantage of accepting high pressure without leakage. The organic fluid flows through FPCs directly and is heated indirectly by […]

Pei Gang, Li Jing, Ji Jie Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Jinzhai Road 96#, Hefei City, Anhui Province, People’s Republic of China 1. Introduction Organic Rankine Cycle (ORC) is named for its use of an organic, high molecular mass fluid that boils at a lower temperature […]

The building simulation code used for this study henceforth includes a generic model, fully coupled, for the complete modelling of the integration of PV panels in buildings. More and more used in the world, as a means of electricity production using renewable energy, PV systems are of great potential and are subject to numerous research […]

One possible perspective is to couple the BIPV with MCPs (phase change materials). These are materials capable of changing of physical state within wide ranges of temperatures according to desired applications (building insulation, passive cooling, thermal energy storage, textile industry, etc.). These materials have the ability to store or to release a large amount of […]

Experimentation data was compared to simulation data. This comparison shows that the thermal model has a good dynamic. However, there are some fairly large differences in amplitude for temperatures of the PV complex wall. To provide some answers to this problem, a sensitivity analysis was run and brought to light the most important parameters on […]

2.7 Thermal Performance of BIPV The review on BIPV has demonstrated that not only a unique physical model exists, capable of predicting the thermal evolution of the building envelope with the influence of photovoltaic systems in various configurations (integrated-fagade, integrated-roof, integrated-glazing, etc.). This chapter has presented a semi-detailed model of a fully coupled PV model, […]

The optimization is the step where the model can be improved and validated. It can be made by using optimization algorithms. In this chapter, we present the use of a free optimization program called GENOPT (Wetter, 2001). This program was set up to allow anyone to use it with his own simulation code. It has […]