I was looking at simulating a waste to energy plant in aspen plus or hysys. The waste is municipal solid waste (MSW). Incinerator will be used for the burning the waste. Hot gases from the incinerator (1200 oC) will be then recovered in a boiler, which will be passed through an extraction turbine to generate electricity ,heat and cooling for district heating.
Does anyone know how to simulate CCHP plant on aspen plus or has anyone done something similar. Any help will be greatly appreciated.
Dear Abdulafath,
check this paper:
https://www.researchgate.net/publication/7995643_Simulation_of_a_waste_incineration_process_with_flue-gas_cleaning_and_heat_recovery_sections_using_Aspen_Plus (Simulation of a waste incineration process with flue-gas cleaning and heat recovery sections using Aspen Plus, done in 2005)
Maybe you contact the authors to help you
best regards
Johannes
Article Simulation of a waste incineration process with flue-gas cle...
Hello,
I have an Aspen Plus model for steam turbine based plant, feel free to touch me if you need it.
Best,
Chuan
You will need to know the elemental composition and heating value of the municipal waste, you may want to run multiple cases with different composition and heating values to cover the reasonable bounds expected for the incinerator feed, Mix with air in a equilibrium or Gibbs reactor and add (or subtract) a heat stream to match the known heat of combustion.
Build heat exchangers (as simple or complicated as you like) cool the outlet gas with boiler feed water on the other side, an excess of BFW is advisable (20-30% vapor is normal for a steam drum) Set the steam drum pressure as you like to produce HP steam (I like 1500 psig steam but that's a design consideration to balance cost and efficiency). Use a steam turbine model (or a backwards compressor) to reduce pressure and generate power (default efficiencies around 80% may be ok but you can tune to whatever data you've got) BFW recycle loop should have about 2% blowdown and corresponding make up water that is heated with lower level heat from the cooling exhaust gas. You can be creative deciding which services you can cover be cooling combustion product (aka flue) gas and at what point you need to use an airfin or cooling water cooler again a balance between cost and efficiency. You are going to have a lot of recycle loops in your simulation my advice is to start with simple heaters and coolers with heat streams between them and one at a time replace with actual exchanger models with known UA.
Let me know if you need more detail.
Dear Abdulafath
You can use another Softwares, like Cycle Tempo.
It is available on http://www.asimptote.nl/software/cycle-tempo/
Here you can find some previous works too:
http://www.asimptote.nl/software/cycle-tempo/cycle-tempo-references/
Dear Abdulafath
You may check this dissertation paper that employed Aspen Plus to develop a quad generation plant.
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