[Stoves] Op-Ed - Realizing the Benefits of Combined Heat and Power Systems

Thu Jun 3 21:48:19 CDT 2021

Dear David

It is a little to describe without drawings but essentially it is like this:

A regular TEG creates current across the line of contact between the two metals that are heated and cooled, that is, along the glue that joins them. As a result the generator is a large number of tiny generators soldered together, directing the electricity towards the cold side.

The new invention produces a current in the same direction as the heat flow. As a result the generator occupies the entire surface and is not made of a lot of tiny parts. The whole surface is "generator" and it has no circuitry. There is therefore a far simpler fabrication process. I understand it is baked twice, first at more then 1100 C then again higher. It means it will be able to operate in a flame environment as far as I conceive it. Being cooled continuously on the back means the front face could be very hot so no need for thermal bonding.

All these features indicate a game-changer for off-grid generation. Imagine a bit attached to your car's exhaust pipe generating 50 or 100 kW.

Regard
Crispin

From: david at aprovecho.org
Sent: June 3, 2021 2:18 PM
To: stoves at lists.bioenergylists.org
Reply to: stoves at lists.bioenergylists.org
Subject: Re: [Stoves] Op-Ed - Realizing the Benefits of Combined Heat and Power Systems

Thank you Crispin,

Can you share any information on the TEG breakthrough?

Best,
-David

On Wed, Jun 2, 2021 at 8:41 PM Crispin Pemberton-Pigott <crispinpigott at outlook.com<mailto:crispinpigott at outlook.com>> wrote:
Dear Friends

This is really of interest to people living in Ontario, however it points a way forward to include more biomass-fired heating and cogeneration of electricity.

It is public knowledge and posted here to stimulate discussion.

There is a new technological breakthrough for Thermoelectric Generators (TEGs) which should hit the market in a few years.  It gives a dramatic improvement in conversion efficiency (heat to electricity).  According to disparate sources, the efficiency might be in the range of 35% and the cost is slashed.  We can talk of $100 per KW for the modules.

The laws in Ontario have been updated with advice from the CSA technical committee rewriting B415.1 – the standard for space heating appliances that burn wood.  There is even a new method for assessing the emissions of site-built masonry heaters in B415.1.  The general idea is to promote wood fuel over diesel in remote communities.

As new TEGs become available, it is a very attractive option and smaller and smaller scale.

Regards
Crispin

From: Malcolmson, Heather (MECP) <Heather.Malcolmson at ontario.ca<mailto:Heather.Malcolmson at ontario.ca>>
Sent: Tuesday, June 01, 2021 14:51

Please find attached an opinion editorial by Minister of the Environment, Conservation and Parks, Jeff Yurek, highlighting the benefits of combined heat and power systems in Ontario and the province’s commitment to support them. We hope that you will enjoy this article and also share it with your membership, through newsletters, direct email or on your websites. As you know, the decision posting on the Environmental Registry is live, and we want to reach as many people as possible, to raise awareness of this important initiative.

The province remains committed to making the approval and implementation of CHP technologies as efficient a possible. As you know, the changes Ontario has brought forward help to match up the required level of approval with other comparable energy technologies and environmental impacts, saving businesses and communities time and money, all while ensuring appropriate environmental protections are in place.

We hope that you will share this article with your membership. If you receive questions, please keep us informed through an email to enviropermissions at ontario.ca<mailto:enviropermissions at ontario.ca>

Thank you,

Heather Malcolmson
Director, Client Services and Permissions Branch
Ministry of the Environment, Conservation and Parks
Phone: 416-302-4063 (cell)

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