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Steam related discussions.
Recharging small fireless locomotive from solar heated boiler - 7 months ago
"Solar to Steam: A Sustainable Reintroduction to Fireless Steam Locomotion" https://deepblue.lib.umich.edu/bitstream/handle/2027.42/172494/Team26-SolartoSteamASustainableReintroductionToFirelessSteamLocomotion.pdf?sequence=1&isAllowed=yby novice - SteamStuff
Re: Uniflow steamengine at 20% efficiency in a car project - 1 year ago
Design and development of an automotive propulsion system utilizing a Rankine cycle engine (water based fluid). Final report https://digital.library.unt.edu/ark:/67531/metadc1092463/m2/1/high_res_d/5714552.pdf SES steam car powerplant Mark I - net brake efficiency 19%. Mark II powerplant -31%. Main problem is cylinder oil carbonization by superheated 1000-1250 F steam. Steam turbinesby novice - SteamStuff
Re: Steam air hybrid automobile report - 1 year ago
Turbofan, turbojet and turboshaft engines are using large amounts of compressed air to cool the engine rotors to avoid their meltdown. Water compression requires much less power than compression of the air to the same pressure. Water injection will decrease excess air and net engine power will increase. In turbojet compressor power equals gas turbine power, in turbofan compressor consumes 2/3 of tby novice - SteamStuff
Re: Steam air hybrid automobile report - 1 year ago
MTU Aeroengines' patent describing semi-closed system for the water injection into aircraft turbofan engine and water recovery ducted air fan cooled wing condenser with the flue gas separation. Patent is in German language, but drawings are quite detailed and show basic operation principle of this engine. https://patentimages.storage.googleapis.com/b7/aa/03/77ddd076f506d4/WO2020187345A1.pdfby novice - SteamStuff
Re: Steam air hybrid automobile report - 1 year ago
"Evaluation of the Climate Impact Reduction Potential of the Water-Enhanced Turbofan (WET) Concept": https://www.mdpi.com/2226-4310/8/3/59 It is quite interesting aircraft engine with combined gas steam cycle. There is no boiler- water is directly injected into combustion chamber of the turbofan engine. The key component of the system is a special membrane system that sepates conby novice - SteamStuff
Steam air hybrid automobile report - 1 year ago
Interesting project, but it seems that it had some technical issues. "Air-Steam Hybrid Engine: An Alternative to Internal Combustion..." https://www.transit.dot.gov/sites/fta.dot.gov/files/FTA_Report_No._0013.pdf "...The sum of the process is as follows: Key start begins a modest fuel burn that immediately provides initial hot air fm ow through the engine. • Depressingby novice - SteamStuff
1926 project of high speed passenger train with steam turbine air propeller - 1 year ago
1926 patent for a high speed passenger train with the air propeller. There were many projects like that, but this train had a steam turbine drive for the aircraft propeller and steam condenser. https://patentimages.storage.googleapis.com/04/1a/80/8dd53e0aefeb53/US1575665.pdf This drive train can also be used in high speed air boat.by novice - SteamStuff
Re: Modern Steam - Formula S Racecar - 2 years ago
Better results can be achieved if the fuel is liquid hydrogen. https://patents.google.com/patent/US4074708A/en Due to very high steam temperature (over 2000F) to turbine efficiency can exceed 50%.by novice - SteamStuff
Re: Modern Steam - Formula S Racecar - 2 years ago
https://www.moma.org/calendar/exhibitions/2460 The Taxi Project: RealisticSolutions for Today. Jun 16–Sep 7, 1976. 45 years after there are no steam taxis in USA or anywhere else. Steam engine drivetrain for the off road vehicles or air boats/sleighs could possibly be viable for the remoted areas in north of Alaska or Canada with abundant wood fuel resources and colder ambient temperatuby novice - SteamStuff
Sentinel coal steam trucks manuals library - 2 years ago
A great collection of technical manuals of the coal steam engine trucks Sentinel: https://www.sentineldriversclub.com/catalogue1.htmlby novice - SteamStuff
Re: Pelland Engineering Ltd. - 2 years ago
LSR steam car boilers thermal power was 3000 kW. Net turbine power 286 kW. So maximum efficiency was just 9.5%. Best steam car designs of the 1970s had net efficiency up to 20% due to use of steam condensers. But their maximum speed was less than 100 mph.by novice - SteamStuff
Re: Pelland Engineering Ltd. - 2 years ago
British steam car challenge vehicle had 386 hp turbine and water loss 8.8 gallons per minute. The condenser could decrease water tank size, but its size would be 5 times larger than for equivalent ICE engine. https://en.wikipedia.org/wiki/Inspiration_(car) Description of various USA 1970s steam passenger cars projects with piston and turbine expanders: https://books.google.com/books/abouby novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
Application of exhaust gas water recovery separators for automotive IC engine with water injection. https://www.sae.org/publications/technical-papers/content/2018-01-0369/ "...Water injection and collection simulations on three different drive cycles using GT-Drive showed that more water could be collected than was required for injection on FTP and WLTP drive cycles, while 40~70% of reby novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
Steam cycle in aircraft turbofan engine. Water loss is very low due to exhaust gas water recovery in air cooled condenser. https://youtu.be/pMg_PWK6C-s https://aeroreport.de/en/innovation/thrust-for-the-future "... and water-recovering gas turbine, meanwhile, integrates a steam power process into the gas turbine processes. This involves using a gas turbine with steam injeby novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
Example from previous pages of this topic: Altitude - 45000 ft Aircraft speed - Mach 0.9 =594 mph Steam input - 1200F/10000 psi Steam exhaust - 553 F/800 psi Steam condensation at 518 F Specific heat consumption of this steam turbojet engine is 5.3 btu per second per 1 lbs of engine thrust. This is equivalent of 5.59 kW of thermal energy per 1 lbs of engine thrust. 1 lbs of thrby novice - SteamStuff
Re: Alternate condensation process. - 2 years ago
This power cycle is combination of Rankine cycle and a absorption refrigeration chiller/cooler. http://www.renewableenergyfocus.com/view/32641/the-hygroscopic-cycle-for-csp/ https://www.hygroscopiccycle.com/by novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
There are steam turbines that work without steam condensation- backpressure turbines. Problem with mechanical steam compression is much higher energy loss and larger dimensions of the steam compressor in comparison with condensate pump. In theory, closed cycle aircraft propulsion is possible with steam turbine, gas turbine or Stirling engine. The problem of all these systems is the air side ofby novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
In all automobiles the air fan is installed behind the radiator(s). All of the steam condensing locomotives also had the same operation of the cooling fans. In most of the steam aircraft projects the fan or air blower was in front of the condenser. That was necessary for downsizing the air cooled steam condenser dimensions and its air pressure drop.by novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
Steam boiler is heated with a high temperature gases. Combustion process can be greatly intensified by turbocharging. https://steamautomobile.com:8443/ForuM/file.php?1,file=4576 - German WWII design of the steam turbine aircraft with the turbocharged steam boilers. In USA Nathan Price proposed turbocharged steam generator with weight of 1800 lbs producing steam for 5000 hp aircraft steam turby novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
Rick.H Wrote: ------------------------------------------------------- > > Hi Novice, > To stay on task, I just read Besler was a big > boundary layer guy. He called his airplane forced > circulation boiler a boundary layer breakthrough. > > Here's the question, what is the boiler planned > for the nuclear steam generator, i.e. mono-tube, > forced circulatiby novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
The Steam automobile Vol 24, #3, 1982 has an article on pp.22-23 regarding the 236 hp , 75850 rpm open cycle steam turbine for the record 1985 steam automobile. Turbine has diameter 5.4 inches and 81 blades. Steam pressure and temperature are 900 psi/900F. Fuel flow is 0.83 gal/min and 3.76 million Btu/hr.by novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
Besler underestimated steam condenser for his 200 hp motor. SES steam condenser was designed for 150 hp motor at exhaust temperature 258F and has a weight 190 lbs (core-93lbs, fans and structure-86 lbs, water-11 lbs). For 800 hp condensers weight will be 760 lbs or possibly 500 lbs with modern materials. Each condenser had two fans 3 hp each. Also condenser's dimensitions were bigger.by novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
British record steam turbine car had water loss 10.5 gallons per minute at 325 hp. That is roughly 10 times the fuel flow which was also not great due to poor thermal efficiency of just 8% (242kW of mechanical power out of 3000 kw fuel energy per hour). Condenser will have to transfer to the ambient air over 2200 kW of waste hear with small temperature rise. At higher flying altitude air is muchby novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
Full scale steam powered aircraft project probably will cost much more than $100k. It is probably cheaper to build a small RC aircraft steam powerplant. Besler steam engine was able to run at maximum steam temperature 720F instead of 1000F due to difficulties with high pressure cylinders lubrication. Steam turbine is only limited by stainless steel maximum working temperature. In order to havby novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
Steam turbines that can work in aircraft: https://asmedigitalcollection.asme.org/GT/proceedings-pdf/IGT1985/79429/V001T02A042/2477607/v001t02a042-85-igt-113.pdf. Scaled up version of the 10 kW steam turbocharger. http://www.steamcar.co.uk/design.html 325 hp steam turbine of the record steam car can be modified for higher pressure and temperature.by novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
Besler's 4 engine steam aircraft design can be built using modern technology. 200 hp steam powerplant had a maximum weight 432 lbs with the water reserve. Cooling fan could help to decrease water loss during ground run and takeoff. Replacing piston steam engine with the compact high rpm lightweight steam turbine with the gearbox could increase power and efficiency by boosby novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
Heavy duty steam powerplant underground coal mine haulage vehicle with the closed cycle and forced air cooling steam condensation. Because this vehicle was designed to operate at almost maximum power with complete steam condensation its parameters can be a good starting point for the steam aircraft powerplant calculation. https://www.osti.gov/servlets/purl/5253350 " Demonstration of a sby novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
Condenser performance is critical for the steam aircraft feasibility. Steam condensation temperature has to be as high as possible, up to 450F ( car radiator - 220 F). At the same time steam cycle efficiency is higher at lowest possible temperature. The best time to operate steam aircraft is cold winter. At high summer temperature steam condensation will be incomplete or the condenser size and wby novice - SteamStuff
Re: Steam turbine driven turbojet - 2 years ago
It is feasible to build a small aircraft steam powerplant using modern materials. Piston steam engine is easier to build, but it can't work at very high temperatures. Steam turbine can work at much higher temperatures up to 1500F. It is better to place the air cooling fan, steam turbine, steam vapor generator and steam condensing radiator together into single casing. In that case about 75-80% ofby novice - SteamStuff
Re: steam cylinder oil - 2 years ago
High efficiency steam piston engine requires high pressure superheated steam. This causes serious problem with cylinder oil selection. In internal combustion engine oil burns out, but in steam expander it turns into a hard carbonized deposits. In steam engine with steam pressure 1000psi and steam temperature 1040F the cylinder rings are heated to over 600F.by novice - SteamStuff