"Carbon footprints of various sources of heat – biomass combustion and CHPDH comes out lowest " – William Orchard.

The analysis indicates that burning biomass in large scale CHP has significant benefits compared to Anaerobic digestion of biomass and then burning the gas in CHP or in boilers.
The table follows the convention of treating the growing of biomass and the CO2 it absorbs as one process and then the use of biomass as a second process.
Wood used in a building where it may be stored for hundreds of years will reduce global CO2 whereas burning the wood merely stabilises CO2.
Growing biomass and then burning it can not reduce global CO2.
Using the current waste heat from today’s power generation to heat buildings will however displace other fuel and thus reduce global warming.
Given my logic is sound the use of waste heat from electricity generation should be given greater incentives by government than burning biomass. 
I am not an expert on the different routes to biofuels but those that are will no doubt comment.

William Orchard – Orchard Partners





Related Posts

The stupidity of mass burning of biomass to replace coal.

IEA Biofuels 2050 Roadmap (27% of transport fuel) – Press release 20apr11

The CCE-SJ Gasproducer gasifier was developed to consume solid wood Biomass fuels to produce tar-free gas for electricity generation and / or heat applications / chp.

The Orchard Convention for the analysis of chp


  1. Mitch Henrion - April 14, 2009, 10:41 am Reply

    Would you be willing to send (or direct me to) a copy of the table in “Carbon footprints of various sources of heat – biomass combustion and CHPDH comes out lowest” (by William Orchard) that is either in a larger text size or is higher resolution (so that I can successfully magnify it)? I am currently not able to read any of the entries in the table.

    Thanks, Mitch Henrion

  2. admin - April 14, 2009, 8:25 pm Reply

    in my browser I just double click on it and it bigs it up?
    let me know if that doesn’t work.


    Dave A

  3. moeen - November 12, 2010, 2:47 pm Reply

    Dear Madam or Sir:

    I would like to introduce myself as a last year student in Electrical Engineering (Power) at Bachelor’s level working on my thesis. My thesis subject is about the combined heat and power (CHP) systems called co-generation. I am investigating a hospital as a case study.

    The purpose of my thesis is to compare a CHP system with a conventional system from economical point of view. As a brief description of investigated system, it is including three main equipments as follows.

    1. A reciprocating engine fueled with natural gas or diesel
    2. A generator with the ability of generating 400 V output voltage by connecting to star with frequency of 50HZ
    3. A heat recovery system by the ability of producing steam since the hospital has absorbtion chiller

    In order to conduct my thesis with mentioned purpose, three critical factors are required as net electricity generated, the process net heat supplied and total inlet fuel. I extremely need your valuable help and consultation in order to become a professional engineer in CHP. Therefore, I will appreciate if you could give me the required resources and information and I would be happy if you could kindly send me your catalogues including detailed specification of your systems. I am looking forward to hearing from you.

    Best regards and thank you in advance,

    Moein Ziraki


  4. admin - November 12, 2010, 11:26 pm Reply

    Dear moeenziraki@gmail.com
    the information you require is contained in the specification fo rsome ofr the chp systems advertised in this site – or you can go to a manufacturers web site . you really should not be so lazy

  5. Eco Global Markets - February 9, 2012, 5:48 pm Reply

    The best chance of making the UK a low-carbon economy comes through community-owned green energy projects. According to a collection of civil groups that represent 12 million people, government support to create a low carbon economy should be greater. Local people need a stake in energy generation and to be given the chance to produce low-carbon, low-cost energy.

  6. Benefits Of District Heating For The UK | Energy Topics - July 20, 2014, 9:07 pm Reply

    […] to a study from the Cleverton Energy Research Group, district heating is the cheapest method of cutting carbon emissions, and has one of the lowest […]

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