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Performance was assessed via convective heat transfer, viscosity index, and oil flash point across temperatures from 50°C to 100°C. Flash point and kinematic viscosity increased with temperature, and overall performance was above 70%.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & Report",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/design-construction-and-characterization-of-a-model-heat-exchanger-unit-for-preheating-lubricating-oil/291164/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/design-construction-and-characterization-of-a-model-heat-exchanger-unit-for-preheating-lubricating-oil/291164.png","ImageObject",300,407,{"name":42,"@type":43},"Aurelia","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-11-04","2026-09-17",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",16,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"What is the main objective of the project work?","Question",{"text":63,"@type":64},"To design, construct, and characterize a model heat exchanger unit specifically for preheating lubricating oil and evaluating its performance.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How was the heat exchanger rig constructed?",{"text":68,"@type":64},"It used a 30-liter water reservoir, a 10-liter oil reservoir, PVC piping (0.012 m diameter, 0.7 m long), a 0.5 HP electric pump, and other fittings assembled at the Mechanical Engineering workshop.",{"name":70,"@type":61,"acceptedAnswer":71},"Which parameters were used to evaluate performance, and how did they change with temperature?",{"text":72,"@type":64},"The study evaluated convective heat transfer, viscosity index, and the oil flash point at temperatures between 50°C and 100°C; 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Nwachukwu  \nDepartment of Mechanical Engineering, Caritas University Amorji Nike Enugu  \nEmail: [ebubedikeugwu@gmail.com](ebubedikeugwu@gmail.com)  \nABSTRACT  \nThis project work is the design, construction and characterization of a model heat exchanger unit for preheating lubricating oil. The experiment Heat exchanger rig was developed using a 30 liters water reservoir, oil reservoir (10 liters), PVC pipe (0.012m diameter, 0. 7m long), 0.5 HP Electric pump and other fittings; with the assembly of these components at the Mechanical Engineering workshop, Caritas University, AmorjiNike. The performance of the heat exchanger unit was evaluated by the assessment of such parameters like the convective Heat transfer of the rig, viscosity index and flash point of the oil at various temperatures ranging between 500C to 1000C. It was observed that the flash points ofthe oil increased with increasing temperature and the kinematic viscosity increased. The design study indicated that the Heat exchanger rig performance is above seventy percent (70%).  \nKeywords: Convective Heat Transfer, Flash Point, Viscosity Index.  \nCARITAS UNIVERSITY JOURNALS [www.caritasuniversityjournals.org](www.caritasuniversityjournals.org)  \n104  \nINTRODUCTION  \nThis research is a substantial experimental deduction of heat transfer to lubricating oil. Heat exchangers are devices used for transferring thermal energy from one fluid to other as a result of mainly convection and conduction. There are no external heat and work interactions during transfer of thermal energy within a heat exchanger. The thermal energy rating of a heat exchanger is dependent on several factors such as type of fluid, configuration, material selection etc and this thermal efficiency can be improved by means of heat transfer technique. The heat transfer processes in industries are mostly classified under forced convection. Convection is a mode of heat transfer in which thermal energy is been transferred as a result of bulk fluid motion on a solidbody i.e. combined effect of conduction and advection. Convection exist as free and forced mechanism depending on the mode in which the fluid flow is initiated. For free and forced convection, fluid flow is as a result of buoyancy effect, i.e. the rise of warmer fluid and fall of the cooler fluid. Whereas for the forced mechanism, the fluid is pressurized to flow as a result of external means such as a pump or fan. The fluid motion through a circular cross section set up as smooth and streamlined which is called transition from laminar to turbulent flow occurs over some region which is called transition region. The efficiency of heat supplier is an important topic in these devices and provides a new way to design and analyze them. The cost of energy and material has led to a dramatic endeavor for designing more efficient and economical heat exchanger units (Cengel, 2004)|.  \nJames et al. (2016) designed and constructed a tube type lubricating oil heat exchanger. They denoted that the application of heat transfer is in designing heat transfer equipment for exchanging heat from one fluid to another. Furthermore, tube type heat exchangers are used when a process requires large amounts of fluids to be heated or cooled. Due to their design, they offer a large heat transfer area and provide high heat transfer efficiency. Hence, the purpose of their research design was to design heat exchanger device that is economical and suitable enough to r preheating lubricating oil and with the application of automobile engine lubricatioenhance the process of exchanging heat between two fields at different temperature variation","cbCaimrJqiPax3qm","https://ap.wps.com/l/cbCaimrJqiPax3qm","pdf",439769,"English","# Introduction\n## Heat transfer principles for lubricating oil\n## Convection mechanisms and flow regimes\n## Heat exchanger efficiency and design considerations\n## Related studies and applications\n# Abstract","[{\"question\":\"What is the main objective of the project work?\",\"answer\":\"To design, construct, and characterize a model heat exchanger unit specifically for preheating lubricating oil and evaluating its performance.\"},{\"question\":\"How was the heat exchanger rig constructed?\",\"answer\":\"It used a 30-liter water reservoir, a 10-liter oil reservoir, PVC piping (0.012 m diameter, 0.7 m long), a 0.5 HP electric pump, and other fittings assembled at the Mechanical Engineering workshop.\"},{\"question\":\"Which parameters were used to evaluate performance, and how did they change with temperature?\",\"answer\":\"The study evaluated convective heat transfer, viscosity index, and the oil flash point at temperatures between 50°C and 100°C; flash point and kinematic viscosity increased as temperature rose.\"}]","Design, Construction and Characterization of a Model Heat Exchanger Unit - for Preheating Lubricating Oil | PDF",23]