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Enwave Deep Lake Water Cooling

44 North

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AlvinofDiaspar

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Just hook the deep lake water to my veins. So hot. But in all seriousness do wonder if the eastern waterfront will be planned to have a district DLWC system in place. And if not then why.

The only place to do it is where there is a significant water intake - at RC Harris. Not much density there to demand such a system though.

AoD
 

W. K. Lis

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There was no single region-wide water supply system, but the principle of processing Lake Ontario water on a large scale and piping it up to the urban areas -- introduced in the 1950s by Metro Works and the MTPB -- remained in place. From "Greater Toronto Area Urban Structure Concepts Study: Summary Report" (1990).

From link. Don't forget that the 905 is growing in population, needing more water.
 

44 North

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The only place to do it is where there is a significant water intake - at RC Harris. Not much density there to demand such a system though.

AoD

Sorry meant Central-eastern Waterfront - East Bayfront, Lower Don Lands, Villiers, Port Lands. Should all have Deep Lake Cooling.
 

smably

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East Bayfront will soon be hooked up to Enwave -- construction on the tunnel is ongoing. The LCBO headquarters at 100 QQE will be connected, as will Corus Quay and probably other buildings in the area. Not sure about other eastern waterfront neighbourhoods. Hopefully this expansion is just the first step to getting it out toward the Lower Don Lands.
 

ChesterCopperpot

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The expansion of the DLWC supply would necessitate the extraction of an increased volume of raw water from Lake Ontario. To supply this volume of water, an additional intake pipe is required at the Island WTP. This intake structure will be located approximately 70-80 metres below the surface of Lake Ontario, and will extend 3- kilometres into the Lake.

This intake pipe will terminate on the south shore, with the construction of a new pipeline-cleaning chamber, connection to a new drop-shaft Shaft #3, and connection to the existing Island WTP intake pipes. which will be upgraded to facilitate the connection of the existing and proposed components of DLWC system. Shaft #3 is generally located on the south side of Lakeshore Avenue, and will house process equipment (i.e. valves, flowmeters, screens, etc.). DLWC water will bypass the Island WTP and be conveyed via a new tunnel from Shaft #3 to Shaft #1, which is located near the John Street Pumping Station. Depending on the Design Build Contractor’s preferred construction method, this tunnel will either be:

a) a deep rock tunnel from Shaft #3 to Shaft #1, or
b) a shallower microtunnel from Shaft #1 to an intermediate Shaft #2 located on the south side of Service Road (to the north of proposed Shaft #3 and the Island WTP). At Shaft #2, the tunnel would change to an approximately 2.6 km long deep rock tunnel to continue on to Shaft #1.

At Shaft #1, the DLWC raw water will be used to extract heat from the existing district cooling loops, the warm water will flow to Enwave’s Simcoe Street Cooling Plant for addition heat extraction, and will then be discharged bake into Lake Ontario.

As part of this expansion process, the following City-owned parks will be impacted: HTO, Southern Linear Park and future Rees Park as well as the parks on the Toronto Island, specifically those around the Island WTP where Shaft #3 is located and where the tunnel will pass under. The portions of the parks impacted by the expansion are illustrated in Attachment A.

The two possible alternative tunnel alignments being considered are generally located in the same area and would require easement over the same parks.

 

DSC

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This should probably be read in conjunction with this City Council Report of late 2019 which seems to give general approval to the concept. http://app.toronto.ca/tmmis/viewAgendaItemHistory.do?item=2019.IE10.9
 

Richard White

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Public Consultation Meeting back in May for Enwave system expansion:


AoD

This is and always was a bad idea. I worked at Maple Leaf Square where this was implemented and in the summer the temperature inside the condos wont go below 23.5 C in the summer because of the demand on the system. If there is a high demand it won't go lower than 25.

The reason for the problems is the limited supply of water coming in from the lake and the temperature of the water once it reaches the building. A hot day means a warmer lake..
 

rbt

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This is and always was a bad idea. I worked at Maple Leaf Square where this was implemented and in the summer the temperature inside the condos wont go below 23.5 C in the summer because of the demand on the system. If there is a high demand it won't go lower than 25.

The reason for the problems is the limited supply of water coming in from the lake and the temperature of the water once it reaches the building. A hot day means a warmer lake..

The building chiller is undersized (either mechanically or via software by board request) to keep costs lower. It has nothing to do with the cold water supply from the lake being insufficient.

It's not an uncommon issue with condos with maintenance fees under the 75 cent/sqft/month cost range.
 

AlvinofDiaspar

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On another note - I am guessing Enwave must be the largest natural source cooling system in the world by now, if not before this expansion.

AoD
 

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