CrazyEngineers Forum - Mechanical & Civil Engineering |
- Reverse orientation of drive train?
- Low temperature heat recovery methods in power generation
- Better heat transfer fluid other than water in power generation
| Reverse orientation of drive train? Posted: 13 Aug 2011 10:45 AM PDT hi all, i need to validate a concept of reverse orientationof the gear box being coupled with a 19bhp 300cc engine. i was told to engage reverse gear all the time to all the fwd gears and turning the engine by 180 degree to get forward drive. reverse motion is obtaind at first gear. normal orientation has gear ratios as 31.48, 18.7, 11.4, 7.35 and 55 reverse. and at reverse orientatios gear ratios are told to be 55.08, 32.75, 19.96, 12.87 and 31.48 reverse . this is basically done to increase the gear ratio as apparent. back drives are installed in lathe but how to get better tordue by using reverse gearing in automobile is quite confusing. are first and reverse gear swaped or something else can be done. we need 55.08 ratio at first for sure. kindly can someone see throught this reply as soon as possible. thank you |
| Low temperature heat recovery methods in power generation Posted: 12 Aug 2011 10:06 PM PDT The designers take utmost care for heat recovery from fuels while designing power plant equipments as well as preservation of it for maximum utilization .With advent of better heat insulation materials,better heat transfer materials in heat exchangers,precious little heat is wasted outside thermal cycle. However any heat having temperature more than atmospheric temperature is a loss. What are methods available to recover this low temp.heat in a Thermal Power Plant? |
| Better heat transfer fluid other than water in power generation Posted: 12 Aug 2011 09:57 PM PDT Presently water (treated) is extensively used worldwide in thermal power generation .The three factors mainly in favor of water being 1) abundantly available in nature 2) can be converted in all three forms viz.liquid,gaseous, & solid. 3)heat can be stored & released as per Universal gas equation.i.e. P V = m R T. However in continuing development on fronts of Heat Transfer; there might be other fluids which may have better heat transfer properties which when used instead of water may benefit in achieving higher electrical generation for the same quantity of fluid. Also it may reduce cost of water treatment plant,auxiliary consumption, blow downs etc etc. Request to enlighten on this subject:o |
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