Abstract
Organic Rankine cycle an alternative way of generating energy from waste heat, fuel and gases at low-temperature. Method (ORC) proved successful and high efficiency to reduce environmental pollution, fuel consumption and convert low to medium heat sources. The paper will be presenting a review investigation on the organic Rankine cycle(ORC), cycle Background, (ORC) configuration, and selecting of working fluids and experimental studied of expansion apparatuses, which are classified into two type volumetric type such as (expander of rotary vane, scroll, reciprocating piston expander and screw) velocity kind (for example axial and radial turbine). Heat exchanger and expander apparatuses are considered economically expensive parts in (ORC).
Highlights
The demand for energy has increased and the adoption of fossil fuels method for generating electric power, so the prices of electricity sales according to the global trend increased by 30% in 2009
In the Rankine cycle temperatures are greater than 300C, which means that it does not require heating equipment and easy than unlike water the entropy variation is between the saturated liquid lines and the steam is greater than the rest of the organic fluids
The expansion apparatus of the major parts in (ORC) have a substantial function to calculate the (ORC) selection expander efficiency was important in the development (ORC) Their choice based on many factors like operation situations and the type of working fluid used
Summary
The demand for energy has increased and the adoption of fossil fuels method for generating electric power, so the prices of electricity sales according to the global trend increased by 30% in 2009. Research has been developed on work (ORC) around the world [1] They presented review on (ORC) applications that used the heat from waste heat, engines, geothermal energy and solar. Adopted in his work on energy analysis They concluded that the working fluid R134a was suitable for the (ORC) at low temperature [3]. The performance of ORC was been compared with solar cell [6] They studied the effect of mixtures on the (ORC) such as zeotropic mixtures. Worked to study the impact of environmental factors for example the solar radiation’s intensity, ambient temperature, angle of solar radiation wind speed and fluid flow rate. This paper review of the (ORC), components of the (ORC), the selecting of the appropriate working fluid and experimental studies on the expansion apparatuses (i.e. volumetric and velocity type) .fig. illustrates classifying for the systems of electricity generation
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