CONTENTDESCRIPTION.WORKING PRINCIPLE.DESIGN COMPONENT.CHOICE OF WORKING FLUIDAPPLICATIONCAPITAL &OPERATING COSTADVANTAGE &DISADVANTAGESUPPLIERS
Power production such as electricity,mechanical work by the process of expansionof organic fluid.It uses a pThis low temperature heat isconverted in to work with the help of rankinecycle.rocess of waste heat recovery system(WHS).The organic fluid such as industrial wasthaving lower boiloing point changes its phasefrom liquid to vapour.This low temperature heat is converted in to
An organic fluid inliquid state at lowpressure is pressurizedby a pumpThis pressurized flowis then vaporized bymeans of a heat sourceThe superheatedvapour is expandedtrough a turbine,producing mechanicalpowerCONT..
An optional regenerator can be added betweenexpander exhaust and condenser supply.The fluid is condensed and flows back to the pumpsupply.Organic Rankine cycles are particularly well-adaptedto low temperature heat sources which includegeothermal source, waste heat from industrial processand solar power
The selection of the working fluid is of keyimportance in low temperature Rankine CyclesIn order to recover low-grade heat, the fluidgenerally has a lower boiling temperature thanwater.Refrigerants and hydrocarbons are twocommonly used components
Waste heat recoveryMost important development field for ORC.applied to heat and power plants, or to industrialand farming processes, automobile exhausts,intercooling of compressor etc.Benefits• CO2-free additional power• Increased plant / process efficiency• Fuel savingsDriving forces• Fuel, electricity prices / incentives• CO2 or emissions constraints• Grid independence
Biomass is available all over theworld and can be used for theproduction of electricity on small tomedium size scaled power plants
Are similar to othersteamturbine thermalpower plantsHeat from a fuelsource is used toheat water or anotherworking fluid.fluid is then used toturn a turbine of agenerator, thereby
SOLAR POWER PLANTThe organic Rankinecycle can be used inthe solar parabolictroughtechnology in place ofthe usual steamRankine cycle. The ORCallows a lower collectortemperature, a bettercollecting efficiency(reduced ambientlosses) and hence thepossibility of reducingthe size of the solar
CAPITAL AND OPERATING COSTIn case of the ORC unit at Lienz, the additionalspecific investment costs as compared to aconventional biomass heating plant amounts toEUR 2.765 per kWe. In general, specific investment costs for ORCunits vary between EUR 1.500 and EUR 3.500 perkWe .When an ORC is applied at the exhaust end of anexisting gas engine the specific investment costsvary between EUR 2.500 per kWe (2 MWe gasengine capacity) and EUR 3.500 per kWe (1200kWe gas engine capacity)
Technical Advantages:-High cycle efficiency .Very high turbine efficiency.Low turbine mechanical stress due to lowperipheral speed.Low turbine rpm, allowing the direct drive ofthe electric generator without gear reduction inmany applications. CONT.
No erosion of bades due to absence ofmoisture in vapour nozzles.No water consumed.
Operational Advantages:- Simple start stop procedures. Automatic and continuous operation. No operator attendance needed. Quiet operation. High availability. (typically 98%)
Partial load operation down to 10% of nominalPower High efficiency at partial load. Lower maintainence cost. Long life
Comparatively small scale electricalgeneration.Must provide cooling source
MaintenanceLowest of all electrical generationHermetically sealed componentsCan be maintained by traditionalmechanic