{"id":64450,"date":"2024-07-26T10:14:56","date_gmt":"2024-07-26T17:14:56","guid":{"rendered":"https:\/\/energi.media\/?p=64450"},"modified":"2024-07-26T10:14:56","modified_gmt":"2024-07-26T17:14:56","slug":"markham-ontario-to-build-worlds-biggest-wastewater-energy-transfer-system","status":"publish","type":"post","link":"https:\/\/energi.media\/news\/markham-ontario-to-build-worlds-biggest-wastewater-energy-transfer-system\/","title":{"rendered":"Markham, Ontario to build world\u2019s biggest wastewater energy transfer system"},"content":{"rendered":"

This article was published by The Energy Mix<\/a> on July 25, 2024.<\/em><\/p>\n

By Mitchell Beer<\/strong><\/em><\/p>\n

A district energy utility north of Toronto is about to begin construction on the world\u2019s largest wastewater energy transfer (WET) installation, a project that is expected to reduce climate pollution by 30,000 tonnes per year, significantly reduce gas consumption, and supply heating and cooling for seven to eight million square feet of space in Markham, Ontario.<\/p>\n

And the piece of the puzzle that sealed the deal was a\u00a0carbon contract for difference<\/a>, a mechanism that will protect the business assumptions behind the project from future changes in the federal carbon price.<\/p>\n

Markham District Energy (MDE), a thermal utility owned by the City of Markham, will build the 18.5-megawatt system to tap into the warm wastewater flowing through a sewer trunk line near one of its existing facilities.<\/p>\n

\u201cAnchored by our comprehensive Greenprint Plan, the City of Markham continues to be a municipal leader in sustainability with targeted steps to achieve net-zero emissions by 2050,\u201d Markham Mayor Frank Scarpitti said in a release. \u201cConstructing the world\u2019s largest wastewater energy transfer (WET) project is a leading example of how we can reach this ambitious objective.\u201d<\/p>\n

It\u2019s an opportunity that MDE has had its eye on for a quarter-century, but only began to consider seriously about five years ago, President and CEO Bruce Ander told\u00a0The Energy Mix.\u00a0<\/em><\/p>\n

\u201cWe always knew there was constant temperature in this flow, and therefore an energy opportunity,\u201d he said. But \u201cyou need a system to deliver it to. You could do a small project on a building scale with a small wastewater sewer trunk going by. But for the scale we needed, the community energy system had to develop to the point where the energy could be fully utilized.\u201d<\/p>\n

The utility\u2019s Markham Downtown facility is built to serve 240 buildings totalling about 15 million square feet, \u201cso that gives us the scale to use the energy flowing by,\u201d he said. \u201cThat\u2019s what we needed to have happen. We needed a place to put the energy.\u201d<\/p>\n

Scaling Wastewater Energy Transfer<\/h2>\n

Ander said Markham\u2019s experience points to both the potential to bring wastewater energy transfer at the utility scale, and the success factors a community would have to put in place to make it work.<\/p>\n

Every municipality has sewer lines, and \u201cthis is simply heat pump technology using the constant water temperature in a flow of water going by,\u201d he said. \u201cThere are some special things you need to do with that water\u2014it\u2019s raw wastewater, so you have to deal with it and then return it to the sewer main after you\u2019ve exchanged the temperature\u2014but the potential is large.\u201d<\/p>\n

District energy systems are already in place in Ontario communities like Ottawa, Cornwall, Sudbury, and London, and in many parts of British Columbia, he added.<\/p>\n

But a city would need a well-developed thermal grid to repeat Markham\u2019s experience. \u201cThe key to wastewater energy recovery is to elevate the temperature to be able to use it in the heating system,\u201d but that only works with a system that relies on low-temperature hot water, as opposed to steam. \u201cWith a legacy steam system, you don\u2019t really have the ability to bring the temperature to that level.\u201d<\/p>\n

After that, the system would have to connect to dozens of buildings to make full use of the resource, or in Markham\u2019s case, hundreds. \u201cThese are capital-intensive projects, so you need to scale in order to justify a project like WET,\u201d Ander said. Unless a community already has a district energy system in place, \u201cit will take years, frankly, to connect enough building load to use the thermal energy at scale.\u201d<\/p>\n

Still, he said some communities in B.C. are considering wastewater energy transfer projects, and Toronto Western Hospital is\u00a0installing a $38-million system<\/a>\u00a0that is expected to reduce its carbon emissions by a little more than 8,000 tonnes per year. \u201cWith the pricing of carbon, and maybe with the protection of that carbon price [through contracts for difference], there might be other projects that will emerge in the next few years. They won\u2019t be in every city and campus in the country, but there will be a number of them.\u201d<\/p>\n

Contract for Difference Seals the Deal<\/h2>\n

The Markham project is backed by a C$135-million loan facility from the Canada Infrastructure Bank, a $135-million line of credit from CIBC, $700,000 from Enbridge Gas, $16.7 million from the federal Low Carbon Economy Fund, and $8.2 million from the Green Municipal Fund. But the carbon contract for difference made all the difference, Ander said.<\/p>\n

That part of the deal was essential because the system will be built to avoid burning natural gas. At $80 per tonne of carbon dioxide emissions, the federal floor price on carbon accounts for about half of the price of gas, and therefore half of the financial savings that MDE stands to achieve. Current federal policy calls for the carbon price to hit $170 per tonne by 2030.<\/p>\n

\u201cOne thing we needed to do was to check the risk of\u00a0changing carbon policy<\/a>\u00a0in Canada,\u201d Ander said. So the contract for difference with the federal Canada Growth Fund is set up to \u201cprotect this project and MDE from carbon going to zero.\u201d The deal is the first of its kind in Canada, and \u201ca great product that we worked with the Government of Canada to execute,\u201d he said.<\/p>\n

As it stands, the project will bring a \u201cmodest return, but still a return that is acceptable,\u201d under a 30-year contract between MDE and York Region.<\/p>\n

When Finance Minister Chrystia Freeland, who attended the July 16 launch, first introduced the $15-billion Canada Growth Fund in her\u00a02022 budget<\/a>, then contracts for difference in the\u00a02023 edition<\/a>, there was concern in some quarters that their main purpose would be to support carbon capture and storage (CCS) projects that are\u00a0far less ready for prime time<\/a>\u00a0than the heat pump technology on which wastewater energy transfer depends.<\/p>\n

So far, CCS has been the primary focus of just one of the Growth Fund\u2019s five investments, though by far the largest. They include $90 million to a\u00a0deep geothermal company<\/a>\u00a0[pdf]<\/em>\u00a0in Alberta, a\u00a0waste-to-energy project<\/a>\u00a0[pdf]<\/em>\u00a0in Edmonton, $50 million to a\u00a0cleantech and climate impact investment fund<\/a>\u00a0[pdf]\u00a0<\/em>in Montreal, a $2-billion carbon capture and storage deal with Calgary-based\u00a0Strathcona Resources<\/a>, and MDE.<\/p>\n

\u2018Big Moves\u2019 Ahead<\/h2>\n

Ander predicted \u201csome big moves in the future\u201d that will boost district energy\u2019s contribution to building decarbonization. \u201cWe\u2019ve done some small moves already,\u201d like installing cogeneration units to capture waste heat from natural gas facilities. But WET is something bigger, and bigger still is the opportunity to harness deep geothermal technology for clean heating and cooling.<\/p>\n

In contrast to standard ground-source heat pumps, deep geothermal drills down \u201cnot just hundreds of feet but kilometres, to much hotter temperatures underground,\u201d he explained. To date, deep geothermal has been seen mostly as a power generation technology, \u201cbut more importantly it can lead to thermal heating for large areas of density in our cities.\u201d<\/p>\n

Another option that \u201cI never would have believed would be a topic\u201d at district energy conferences, he said, is the potential to co-locate district energy units with small modular nuclear reactors (SMRs), if and when they\u2019re installed in cities.<\/p>\n","protected":false},"excerpt":{"rendered":"

This article was published by The Energy Mix on July 25, 2024. By Mitchell Beer A district energy utility north of Toronto is about to begin construction on the world\u2019s largest wastewater energy transfer (WET) [Read more]<\/a><\/p>\n<\/div>","protected":false},"author":6,"featured_media":64451,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"give_campaign_id":0,"footnotes":""},"categories":[1],"tags":[13,41,14,2623,121],"class_list":{"0":"post-64450","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-news","8":"tag-canada","9":"tag-energy","10":"tag-featured","11":"tag-heating","12":"tag-innovation"},"acf":[],"yoast_head":"\nwastewater energy transfer - Thoughtful Journalism About Energy's Future<\/title>\n<meta name=\"description\" content=\"Markham's wastewater energy transfer installation, a project that is expected to reduce climate pollution by 30,000 tonnes per year.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/energi.media\/news\/markham-ontario-to-build-worlds-biggest-wastewater-energy-transfer-system\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"wastewater energy transfer - 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