PDF Publication Title:
Text from PDF Page: 001
Nadaf et al., International Journal of Advanced Engineering Technology E-ISSN 0976-3945 Review Article A REVIEW ON WASTE HEAT RECOVERY AND UTILIZATION FROM DIESEL ENGINES S.L Nadaf*1, P.B Gangavati2 Address for Correspondence *1 Department of Mechanical Engineering, Government Engineering College Haveri, Karnataka, India. 2Department of Mechanical Engineering, Basaveswar Engineering College Bagalkot, Karnataka, India. ABSTRACT Still, the diesel engine is far from perfection. Due to rising energy demands, consistently increasing of fuel prices since 1998 and environmental concerns. Researchers have continual push to find more energy efficient technologies have the great reasons for the investigation of waste heat recovery techniques, and are still working hard. In the context diesel engine exhaust heat utilization has the potential to reduce the consumption of fossil fuels and reduce the release of greenhouse gases, significant waste heat recovery technologies have been developed to recover exhaust heat and turn it into useful energy such as electricity. The current worldwide trends of increasing energy demand in transportation sector, extensive work and research have been focused on energy recovery in the automotive sector; therefore the main objective of this paper is to assess different waste heat recovery technologies based on current developments, research trends and its future in an automotive application. As a result, the article drew the conclusion that waste heat recovery and its utilization will remain a good prospect in future automotive engine application. KEYWORDS: Waste heat, heat recovery, heat potential, recovery technologies, engines. 1. INTRODUCTION: The current worldwide trends of increasing energy demand in transportation sector are one of the many segments that are responsible for the growing share of fossil fuel usage and indirectly contribute to the release of harmful greenhouse gas emissions. It is hoped that with the latest findings on exhaust heat recovery to increase the efficiency of ICEs, world energy demand on the depleting fossil fuel reserves would be reduced and hence the impact of global warming(Saidur et al., 2012). Large quantity of heat discharged to the environment from engines, if some of this waste heat is could be recovered; a considerable amount of primary fuel could be saved. In addition to contributing to the goal of saving energy, utilization of waste heat is also an important source of cost savings. It’s the fact that almost 70 % of the energy released from the fuel by an engine is lost, mostly in the form of heat. There is approximate 25–30% of the energy engines generate dissipating in the form of exhaust loss energy (Z.S. Shang, P.L. Li, 1988). Even high efficiency modern engines have only 25 ~ 50% thermal efficiency and the remaining 50 ~ 85% of low heating values of the fuel are dissipating into the environment as a form of heat transfer and exhaust gas enthalpy. If the exhaust gas enters into surroundings directly, it will not only waste energy but also damage the environment. Table 1: Various Engine and There Output (K.T.Wojciechowski) could get as high as 30–40% which is lost to the environment through an exhaust pipe. Great attention has been put recently on the recovery of waste thermal energy in the vehicle. In fact, the energy released through the exhaust of a vehicle, for instance, is of the same order of magnitude of the mechanical power supplied by the engine. In this paper, a brief review of the latest developments and technologies on waste heat recovery of exhaust gas from internal combustion engines has been made. These technologies are thermodynamic organic Rankine cycle (ORC), thermoelectric generators (TEG), air conditioning and refrigeration by using exhaust gas heat energy, strengthening the environmental restrictions and biodiesel preheating. 1.1 Waste Heat Potential from Engines Waste heat is heat, which is generated in a process by way of fuel combustion or chemical reaction, and then “dumped” into the environment even though it could still be reused for some useful and economic purpose. During engine run time, there are four sources of usable waste heat from a reciprocating engine: exhaust gas, engine jacket cooling water, lube oil cooling water, and turbocharger cooling are dissipated to the atmosphere. Some of the areas of I.C engines from which significant amount of heat flows to the environment are shown in the Figure 1. Figure1: Amounts of heat dissipated from engines. The Table 1 illustrates the temperatures of waste gases from process equipment in the medium temperature range. Most of the waste heat of reciprocating internal combustion engines lies in this temperature range (D.A.Reay, E & F.N.Span, 1979). Engine Type Small air cooled diesel engine Water air cooled engine Earth moving machineries Marine applications Trucks and road engines Power Output (kW) 35 35-150 520-720 150-220 220 Waste Heat 30-40 % of energy waste loss from IC engines Power 38% Air after cooler 7 % Frictionandradiation 7% Liquid jacket water 18 Several innovative cooling and exhaust heat recovery systems have been introduced to reduce cooling loss and regenerate the power by recovering the waste heat. Hatazawa et al., Stabler, Taylor, Yu and Chau and Yang stated that the waste heat produced from thermal combustion process generated by engine Int J Adv Engg Tech/Vol. V/Issue IV/Oct.-Dec.,2014/31-39PDF Image | REVIEW ON WASTE HEAT RECOVERY FROM DIESEL ENGINES
PDF Search Title:
REVIEW ON WASTE HEAT RECOVERY FROM DIESEL ENGINESOriginal File Name Searched:
Vol_V_Issue_IV_Article_7.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |