Paper Certificate An efficient parabolic dish engine based on Rankine cycle

Abstract

Abstract. In this research work, a case study carried out to evaluate the technical viability of a parabolic dish based concentrator to convert solar energy into electric power by means of a high performance Rankine cycle operating with, ethane, ammonia or water. The comparison of such cycles in terms of thermal efficiency and net developed work is the aim of the proposed research. The achieved results show that Stirling engine efficiency is so far lower than that of the Rankine cycle under the same operating temperatures since typical temperatures range from 650 °C to 800 °C resulting in Stirling engine conversion efficiencies of around 30 % to 40 %, while the proposed Rankine cycles can surpass such mark.

Study of the Disruptive Design of a Thermal Power Plant Implemented by Several Power Units Coupled in Cascade

“…In the contributions of Ferreiro Garcia, [ 20 ] Ferreiro García and Carbia Carril, [ 21 ] Ferreiro García and Carbia Carril, [ 22 ] and Ferreiro Garcia, [ 23 ] the vacuum assumed as thermal contraction pressure achieved by cooling a working fluid. The cooling effect achieved by heat extraction from a noncondensing thermal working fluid has been used.…”

“…Therefore, according to Ferreiro Garcia et al, [ 15 ] the net efficiency of the power plant will reach unmatched levels of performance. Furthermore, Ferreiro Garcia and Sanz [ 16 ] explored a closed thermal cycle to compare adiabatic and isothermal expansions. The Carnot factor was surpassed at both low and medium temperatures.…”

“…Although vacuums have been used experimentally and applied to industry for more than two centuries, [ 1–11 ] this technological proposal exhibits and uses the cutting‐off or disruptive concept of vacuum achieved by closed process‐based isochoric heat extraction, [ 12–23 ] which is assumed to be an absolutely disruptive technique.…”

“…In summary, two heat–work converters characterized by the use of vacuums to obtain valuable work can be distinguished: 1) Open processes characterized by inherent changes of state, [ 1–16 ] which suffer losses in open process transformations that include condensation, vaporization, and flow work losses. 2) Closed processes characterized by the absence of changes of state (i.e., without the loss of work due to condensation, vaporization, or thermal working fluid flow).…”