Water-source heat pump plant, 30 kW class
by HVAC Builder
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A heat pump whose source is a data centre's cooling loop: a coaxial evaporator on the 18 °C return water a CRAH sends back, a Danfoss VZH052 inverter scroll from the catalog with the maker's eighteen published speed steps setting its part-load power, and a coaxial condenser lifting a heating loop to 54 °C — the arrangement Seattle's Westin Building Exchange and the offices next to it run. The source is warm all year, so the machine works over a 40 K lift instead of an air-source unit's 50–60 K in winter, and the chiller behind it has that much less to reject. It serves no room; it holds its leaving water for whatever draws on it. Published as an example; the figures below are solved from this model.
Example26–34 kW heatingEUExample system. Published by HVAC Builder to show suppliers what their own page looks like. There is no company behind it and it is not a product offer — the specification is generic and the performance is solved from the model on this page.
Design-point performance
Solved from this example's own model as it is published — the same numbers a supplier's page shows for their machine.
Component schedule
| Component | Kind | Duty |
|---|---|---|
| Coaxial evaporator (on the data-hall loop) | Pipe-in-pipe HX | — |
| Scroll compressor | Compressor | 10.0 kW |
| Coaxial condenser (to the radiators) | Pipe-in-pipe HX | — |
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