Design and development of scholl expander

การออกแบบและพัฒนาสกอลเอ็กซ์แพนเดอร์

Name: Kritsada Lowrungsi

Organization : King Mongkut's Institute of Technology Ladkrabang. Faculty of Engineering

ThaSH: Electric power production

ThaSH: การผลิตพลังงานไฟฟ้า

Abstract: The organic rankine cycle (ORC) is an emerging technology for power generation through heat recovering from different thermal sources. In the 1-10 kW ORC power generation, it is difficult to find the suitable equipment to expand the gas, reduce pressure and converse heat to be mechanical energy. Considering from thermodynamics and mechanics principle, it is obviously found that the scroll mechanism is the most suitable for kW scale power generation. The reason for this is that it can operate without the high mass flow rate condition. This thesis presents the design and development of scroll expander to assess the maximum built-in volume ratio (discharge volume/suction volume). Using fixed thickness scroll formulas from the previous work, in this design study, the base radius and inner ending involute angle were chosen to be design variables and the gradient-based methods and the direct search methods were utilized to search for the maximum expansion ratio. Additionally, some of constraints such as scroll wrap radius within 90, within slenderness ratio of scroll height and over the minimum scroll height/base radius ratio were also included in the design. The design result exhibits that built-in volume ratio is 5.7155 which is better than the standard scroll expander, 3.9061. Therefore, this leads to 44.3% improvement of build-in volume ratio. The results of this work can be considered as the first process of ORC system design to maximize performance of expander machine within the desired dimension, the system volume ratio need to be corresponding. Furthermore, the mechanism has been proved from the motion simulation. This shows the designed scroll expander can be working with the smooth operation and without any disruption. Finally, computer aided manufacturing, CAM has been introduced to shows the scroll expander machining for the real production.

King Mongkut's Institute of Technology Ladkrabang. Central Library

Address: BANGKOK

Email: Lifelong@kmitl.ac.th

Name: Monsak Pimsarn

Role: Thesis advisor

Email : monsak.pi@kmitl.ac.th

Created: 2018

Modified: 2563-01-14

Issued: 2020-01-14

วิทยานิพนธ์/Thesis

application/pdf

CallNumber: EThesis

eng

DegreeName: Master of Engineering (Mechanical Engineering)

Level: Master's Degree

Descipline: Mechanical Engineering

Grantor: King Mongkut's Institute of Technology Ladkrabang

©copyrights King Mongkut's Institute of Technology Ladkrabang

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