Thermal/Heat

Once as Compute, once as Heat

Every kilowatt of Compute leaves as Heat. An asset — not a side effect.

Visualization of an insulated Heat pipe from a Kelvin Flexbox toward nearby buildings. District Heat offtake — not home Compute. Not a photograph of an operating site.
Heat pipe — capture designed in.

Destinations

In industry. On the pipe.

Heat that already has somewhere to go.

  1. Industrial & Manufacturing

    Process on site

    Local process Heat on site — premises and the line you already run.

    Drying, kilns, process.

  2. Pipe

    Into the network

    Pipe into an existing district network. Homes on the pipe.

    Heat into the network that already serves buildings.

  3. Municipal

    Municipal network

    A pipe into an existing network where a sink is already on site.

    Destinations at the plot.

  4. District

    District Heat

    District Heat is over half of Heating in Swedish homes and premises.

    Heat for homes and premises on the network.

  5. Glass

    Greenhouses

    Heat into horticulture next to the pad.

    A sink that wants the stream.

Seasonal storage, where it appears, is a siting option next to a sink.

Offtake

Homes on the network. Not home Compute.

District Heat for homes. Process Heat on site.

  1. 01

    Residential Heat

    A Flexbox can feed that pipe.

  2. 02

    Industrial / manufacturing

    The flange is sized to the line you already run — drying, kilns, process.

  3. 03

    Municipal network

    We do not take over the utility.

  4. 04

    District Heat offtake

    Offtake is a published market, not Kelvin’s tariff.

A paused unit is not a baseload boiler. Heat follows the load. See Compute Flexibility and Compute.

Capture

Capture designed in.

Closed-loop liquid cooling makes the Heat stream recoverable. Retrofit of capture onto a hall that was never plumbed for offtake is the expensive path.

  1. 01

    Usable temperature

    Liquid cooling is what makes the Heat stream recoverable at usable temperature — toward district supply.

  2. 02

    Air or liquid

    Forced air or liquid. The flange ships with the unit.

  3. 03

    Not a dump, then a pipe

    A hall built only to vent cannot be cheaply turned into offtake later.

  4. 04

    Heat is tier-independent

    Whichever load runs, the sink still has a stream. A paused unit is not a baseload boiler.

Visualization of a Heat loop on a Kelvin Flexbox. Capture designed in. Not a photograph of an operating site.
Heat loop — capture designed in.

Grade

A data centre is a Heat engine that does arithmetic on the way through. Thirty-three kelvin, sold twice.

The stem is the site: upper arm power arriving, lower arm Heat leaving, Compute at the vertex.

Rack outlet ~305 K. The span between the rack outlet and the district supply is the whole business.

Kelvin is named for the unit.

When the sink is next to the pad, a modular data centre is a municipal Heat plant. One kilowatt-hour, twice.

The flange

Kelvin sizes the flange.

The host keeps the sink. Kelvin sizes the flange to it.

  1. 01

    Flange

    A flange sized to the sink. Grid (LV or MV) into the Flexbox; Heat flange out.

  2. 02

    Distance

    The sink has to be within reach of the pad. A Heat offtake already on site, or a pipe that can be.

  3. 03

    Temperature

    Rack outlet ~305 K; district supply ~338 K.

  4. 04

    Who owns the loop

    The host or the network owns the loop.

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