University of Texas – Austin
Duong, Tai Anh.
Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine.
Degree: MSin Engineering, Mechanical Engineering, 2011, University of Texas – Austin
This research project was about the combined organic Rankine cycle which extracted energy from the exhaust gas of a diesel engine. There was a study about significant properties of suitable working fluids. The chosen working fluid, R134a, was used to operate at the dry condition when it exited the steam piston engine. Furthermore, R134a is environmentally friendly with low environmental impact. It was also compatible with sealing materials. There were calibrations for the components of the combined Rankine cycle. The efficiency of the heat exchanger converting exhaust heat from the diesel engine to vaporize R134a was 89%. The average efficiency of the generator was 50%. The hydraulic pump used for the combined Rankine cycle showed a transporting problem, as vapor-lock occurred when the pump ran for about 1 minute. The output of the combined Rankine cycle was normalized to compensate for the parasitic losses of a virtual vane pump used in hydraulic systems for the 6 liter diesel engines. There were three different vane pump widths from different pumps to compare frictional loss. The pump with the smallest vane width presented the least frictional mean effective pressure (fmep) (0.26 kPa) when scaled with the displacement of the GMC Sierra 6 liter diesel engine. The power output of the Rankine cycle was scaled to brake mean effective pressure (bmep) to compare with the frictional mean effective pressure. The maximum bmep was at 0.071 kPa when diesel engine had rotational speed at 2190 RPM. The power outputs of the organic Rankine compensated partially the frictional loss of the vane pumps in the 6 liter diesel engine. By using R134a, the condensing pressure was 0.8 MPa; hence, the power outputs from steam engine were limited. Therefore, refrigerants with lower condensing pressure were needed. There were proposal for improvement of the organic Rankine by substituting R134a by R123 (0.1 MPa), R21 (0.2 MPa), and R114 (0.25 MPa) .
Advisors/Committee Members: Matthews, Ronald D. (advisor), Hall, Matthew J. (committee member).
Subjects/Keywords: Organic Rankine cycle; Diesel engine; Waste heat recovery; Reciprocal steam engine
to Zotero / EndNote / Reference
APA (6th Edition):
Duong, T. A. (2011). Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-08-4273
Chicago Manual of Style (16th Edition):
Duong, Tai Anh. “Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine.” 2011. Masters Thesis, University of Texas – Austin. Accessed March 05, 2021.
MLA Handbook (7th Edition):
Duong, Tai Anh. “Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine.” 2011. Web. 05 Mar 2021.
Duong TA. Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine. [Internet] [Masters thesis]. University of Texas – Austin; 2011. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/2152/ETD-UT-2011-08-4273.
Council of Science Editors:
Duong TA. Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine. [Masters Thesis]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-08-4273