Abstract
This paper investigates the potential of utilizing the exhaust waste heat using an integrated mechanical device with internal combustion engine for the automobiles to increase the fuel economy, the useful power, and the environment safety. One of the ways of utilizing waste heat is to use a Stirling engine. A Stirling engine requires only an external heat source as wasted heat for its operation. Because the exhaust gas temperature may reach 200 to 700°C, Stirling engine will work effectively. The indication work, real shaft power and specific fuel consumption for Stirling engine, and the exhaust power losses for IC engine are calculated. The study shows the availability and possibility of recovery of the waste heat from internal combustion engine using Stirling engine.
Highlights
Today, the energy researches take a wide place in the world; the automobile is so significant that it consumes more than half of the total energy used by all types of transportation combined
Many researchers examine how to utilize that lost energy and many methods were used such as thermoelectric generation, piezoelectric generation, thermionic generation, thermophotovoltaic, and mechanical turbo [2]. These entire components were considered as electric or electronic methods and they cannot give largest power at high temperature. Another method used to recover the heat from exhaust gas is called organic Rankin cycle (ORC)
The principle working of the organic Rankin cycle is the same as that of Rankin cycle: the working fluid is pumped to a boiler where it is evaporated, passed through an expansion device, and passed through a condenser heat exchanger which it is recondensed [3, 4]
Summary
The energy researches take a wide place in the world; the automobile is so significant that it consumes more than half of the total energy used by all types of transportation combined. Many researchers examine how to utilize that lost energy and many methods were used such as thermoelectric generation, piezoelectric generation, thermionic generation, thermophotovoltaic, and mechanical turbo [2] These entire components were considered as electric or electronic methods and they cannot give largest power at high temperature. The principle working of the organic Rankin cycle is the same as that of Rankin cycle: the working fluid is pumped to a boiler where it is evaporated, passed through an expansion device (turbine or other expander), and passed through a condenser heat exchanger which it is recondensed [3, 4] Another method to recover exhaust heat is by the use of the Stirling engine technique. The use of Stirling engine has many advantages which can be summarized as follows [5,6,7]: high potential efficiency up to 45%, reversible operation, cleaner emissions, quiet operation, low vibrations, low maintenance, smooth torque delivery, and ability to run at different fuels; Stirling engine does not have valves, carburetor, ignition system, or boilers
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