Monday, November 20th, 2017

Improving bioethanol production from sugarcane: evaluation of distillation, thermal integration and cogeneration systems

Publication year: 2010brbSource:/b Energy, In Press, Corrected Proof, Available online 2 November 2010brMarina O.S., Dias , Marcelo, Modesto , Adriano V., Ensinas , Silvia A., Nebra , Rubens Maciel, Filho , …brDemand for bioethanol has grown considerably over the last years. Even though Brazil has been producing ethanol from sugarcane on a large scale for decades, this industry is characterized by low energy efficiency, using a large fraction of the bagasse produced as fuel in the cogeneration system to supply the process energy requirements. The possibility of selling surplus electricity to the grid or using surplus bagasse as raw material of other processes has motivated investments on more efficient cogeneration systems and process thermal integration. In this work simulations of an autonomous distillery were carried out, along with utilities demand optimization…


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Responses to “Improving bioethanol production from sugarcane: evaluation of distillation, thermal integration and cogeneration systems”
  1. Carol says:

    Their reserves altlacuy grew 3%, primarily because India’s bureaucracy and corruption make it very hard to get coal out of the ground. Electricity prices as well as domestic coal prices in India are fixed by the state. The coal prices don’t support a return on investment anywhere close to what a private firm would require. The share of Nuclear energy was only 2.31% (4.78 MW).”Up until 2009 the Nuclear Suppliers group blacklisted sales of Uranium to India. IIRC Australia still is refusing to sell India Uranium.(There have been discussions to lift the ban). So India’s slow takeup of nuclear is based on the fact that they couldn’t even source the Uranium they needed to run the reactors they had until 2009. In 2005 Bush Jr proposed the 123 agreement but it wasn’t approved by the IAEA until 2009. They still have details of their domestic nuclear liability laws to work out. They’ve also had a rather difficult lesson in the need to do public outreach and education before you start building a nuclear plant in someones community in the case of Koodankulam.

  2. Amanda says:

    Jarmo,In the US we calculate hetanig/cooling degree days based on a 65F center line. That is an arbitrary number based on the fact that temperatures in the US are neither predominately warm or cool. Most of the US has hot summers and cold winters.In the UK they calculate hetanig/cooling degree days based on a 15.5C(60F) centerline. The UK really doesn’t have hot summers’. So people tend to acclimate to a bit colder then the average American. I would posit that in Tropical countries people acclimate to some extent to warm. If I look at the average daily low in January for Bombay they have no hetanig requirement using the US base of 65F. Yet the amount of biomass burned for hetanig is not insignificant. Using a 65F US baseline is probably inappropriate, 75F or 80F is probably a normal comfort zone’.

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