Investigative Studies on Performance Behavior on an IDI diesel engine with a Geometrically Modified Swirl Chamber using Biodiesel Blends Journal of Mechanical Engineering, 2023
Performance, emission, and exergy analysis of an IDI dual swirl combustor diesel engine with blended waste Chia seed oil as a biofuel S. Manjunath, Ramakrishna N. Hegde International Journal of Ambient Energy, 2022 This study aims to investigate the performance characteristics of an IDI engine with a novel dual swirl chamber and using biodiesel from waste chia seed oil blended with diesel. To the author’s best knowledge, this is the first study on waste Chia seed oil as a fuel in IDI engine. The injection pressure and CR of the test engine were increased from their recommended values. Biodiesel blends BC05 to BC25 with diesel in volumetric ratios of 5% to 25% respectively with 5% increments were used for experiment purpose. The results showed that biodiesel blends have lesser BTE (from 2.2% to 5%) and higher BSFC (from 3.5 to 5.2%) compared with diesel due to lower CV. With the increase in injection pressure and CR, the difference in BTE and BSFC got reduced because of better atomisation and mixing. The CO and NOx emissions are 9.26% and 27% lesser for the BC20 blend.
Performance and emission characteristics of hybrid biofuels in di diesel engine H. Arunkumar, S.H. Manjunath, N. Varunkumar Reddy International Journal of Vehicle Structures and Systems, 2021 Rubber seed oil (RSO), derived from the seeds of Hevea brasiliensis, is an exciting alternative with great potential for use in biodiesel production. Furthermore, it can be injected directly into an internal combustion engine, blended with diesel derived from fossil fuels. The present work deals with the potential estimation of waste cooking oil (WCO) bio diesel and RSO biodiesel, characterization of biodiesel, performance and exhaust analysis of biodiesel blends in DI diesel engine. The best results in terms of performance and emission are obtained for B10 blend which resulted in highest brake thermal efficiency of 19.2 % at 80% loading. The NOx emissions are maximum for B20 blend.
Heat transfer enhancement in a high power LED using heat sink with liquid pockets Journal of Scientific and Industrial Research, 2018
Experimental investigation on HSFP using MWCNT based nanofluids for high power light emitting diodes Sangmesh B, , Gopalakrishna K, Manjunath S.H., Kathyayini N, K. Kadirgama, M. Samykano, G.C. Vijayakumar, , , , , , , and Journal of Mechanical Engineering and Sciences, 2018 LEDs, of late, have received attention as the next generation lighting system for enhanced luminous efficiency and higher lifespan. However, the thermal management of the LEDs is the crucial parameter to be countered for global acceptance as a revolutionary illumination source. This paper reports the experimental investigation of natural convective heat transfer of high power LED COBs using MWCNT and MWCNT-CuO nanofluids mixed with de-ionized water. The study uses MWCNT based nanofluids as a route to enhance the heat transfer of high power LEDs by the passive cooling technique. This study presents an innovative cooling device integrated with numerous fluid pockets, called the HSFP, to achieve the enhanced thermal performance of heat sinks for applications in high intensity LED lights. Nanofluids of various concentrations were formulated and their heat transfer performance evaluated using a series of experiments and compared with liquid cooling and a conventional heat sink. The experimental finding reveals 20– 30% lowered thermal resistance using the new HSFP (nanofluids). Thus, the HSFP found to effectively dissipates the heat in high-power LED COBs using nanofluids as the cooling medium compared to the conventional heat sink.
