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Publication Title | ENERGY AND EXERGY ANALYSIS OF AN ORGANIC RANKINE CYCLE

Organic Rankine Cycle

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U.P.B. Sci. Bull., Series D, Vol. 76, Iss. 4, 2014 ISSN 1454-2358

ENERGY AND EXERGY ANALYSIS OF AN ORGANIC RANKINE CYCLE

Andreea MARIN1, Alexandru DOBROVICESCU2, Lavinia GROSU3, Adina GHEORGHIAN4

In this paper, energy and exergy analysis is used to show the exergetic performances for an Organic Rankine Cycle (ORC). This system supplies with electrical energy an existing building with a known configuration. The ORC system is supplied with solar energy from an evacuated solar tube collector.

The use of solar energy and the ORC system instead of conventional energy sources reduces pollution and offers energy savings.

The simulations of the operating for the ORC system have been performed using several working fluids. The optimization procedure based on the exergetic analysis enabled the choice of the best working fluid. The optimization looked for reducing the exergy destruction to the key parts of the system.

The careful selection of the working fluid is essential to reduce the exergy destructed and increase the exergy efficiency for the entire installation. Throughout this work, we were able to prove that this proposed configuration of a solar powered Organic Rankine Cycle is a viable solution capable of satisfying the consumer’s needs. The use of an ORC for producing mechanical work from low grade heat source is a valuable solution.

Keywords: Organic Rankine Cycle, solar eneregy, energy and exergy analysis 1. Introduction

In the current economical and energetic context, the implementation of technologies using renewable energies as heating sources is offering a double advantage: the reduction in pollution and in the fuel cost. Considering these two goals, in this paper it was studied the production of electricity through an ORC system. One of the main concerns of the modern human is to provide comfort in buildings. The main utilities are: electricity, domestic hot water, heating/cooling according to external ambiance.

The solar energy represents the heat source that is offered at a maximum temperature of 140oC by a Solar System Collector.

1PhD., Dept.

, University POLITEHNICA of Bucharest, Romania, e-mail: marin_andreea86@yahoo.ro

2 Prof., Dept.

3 Prof., e-mail:lgrosufr@yahoo.fr 4 Junior Lecturer, Dept.

, University POLITEHNICA of Bucharest, Romania

, University PARIS X, France,

, University POLITEHNICA of Bucharest, Romania

of Engineering Thermodynamics, Internal Combustion Engines, Thermal and

Refrigerating Equipments

Refrigerating Equipments

of Engineering Thermodynamics, Internal Combustion Engines, Thermal and

Laboratoire Energétique, Mécanique et Electromagnétisme

of Engineering Thermodynamics, Internal Combustion Engines, Thermal

and Refrigerating Equipments

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