The progressive developments and improvements of Stirling engines show significant effort in reducing the global emission level. The ability to use multiple kinds of heat sources with low emission level make it as a promising alternative solution in providing a healthier environment for natural population. For the present work, the thermodynamic cycle evaluation is conducted to a numerical model of proposed design of single-cylinder rhombic drive beta-configuration Stirling engine. The evaluation is carried out based on Schmidt ideal adiabatic model presented by Berchowitz and Urieli. The evaluation is based on three working space volumes of proposed beta-configuration engine. The prediction of reciprocating displacement, engine volumetric displacement, working fluid cycle pressure, working fluid instantaneous mass, cyclic energy flow and cyclic temperature are carried out and discussed. The proposed design's performance can be enhanced by maximizing the operating temperature difference between heat and sink source. Besides, the pressurization method could increase the thermal energy absorption and rejection thus enhancing the engine performance.
In this present work, the design and simulation of crankshaft for multi-cylinder Stirling engine is studied based on finite element analysis. The proposed crankshaft design is based on the typical crosshead slider-crank mechanism that is being used with the consideration of design needs for multi-cylinder Stirling engine. The study focused on the piston-crankshaft assembly that is subjected to compression load in Stirling cycle. Based on the simulation results, the maximum von Mises stress for crankshaft model varies from 0.82 MPa at 1 bar charge pressure to 1.65 MPa at 20 bar charge pressure. Minimum factor of safety is founded to be 33 with maximum deformation under maximum charge pressure. For piston-crankshaft assembly load, minimum factor safety of 2 was observed with maximum compression pressure for minimum charge pressure. The results indicate no yielding and structural failure under compression load case, can be satisfied.
Energy is a continuous driving power for the social and technological development. Developing thermal energy storage(TES) is a competent way to provide continuous power generation. The key issue in designing the TES system is its thermal capacity of storage materials. This study is focusing on the potential waste material as an insulator for thermal energy storage applications. The insulator usage is to reduce the heat transfer between two medium and the capability is measured by its heat flow resistance. The bigger the value, the more blocking capacity or insulating it provides. It is needed to find optimal material to energy conversion at the same time reduce the waste generation. Therefore, a small-scale experimental testing of natural cooling process of an insulated tank within a confined room without any forced cooling system, e.g. fan. The testing is repeated by changing the insulator using the potential waste material from natural and industrial waste. The analysis is performed on the relationship between heat loss and the reserved period by the insulator. The results represent the percentage of period of the insulated tank withstand the heat compared to non-insulated tank, e.g. cotton reserved the period of 19% more than non-insulated tank to withstand the heat transfer of water to the surrounding. The paper finally justifies that cotton is the most potential waste material as an insulator in water.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.