Rosie Hospital HVAC

HVAC

Rosie Hospital HVAC

Current/OS Partners Involved:

Arriba Technologies

Location

Cambridge, UK

Setup

2023

Context

  • High amperage heat pumps with variable frequency drives can be coupled with the converters of rooftop solar panels and a bi-directional battery in a DC microgrid.
  • Heat pumps and fan-coil units already operate with an internal DC bus, using inverter technology for motor speed control. The next step is a fully DC-powered version – an innovation embraced by companies like Current/OS partner Arriba Tech. Learn more.

Implementation

Set up at Cambridge’s Rosie Hospital:

  • 750kW facility with power converters and DC electrical system to push PV energy straight into HVAC
  • 80kW solar array
  • Four 20kW DC:DC converters and two Ac:DC rectifiers

    • Benefits

    Savings and Net-Zero achievements

  • Rooftop solar panels run 7% better when powering HVAC motors across a DC line
  • Covers up to 90% of the hospital’s needs for heating, cooling and domestic hot water.

    • Quote

    “DC power systems are at the heart of the modern electricity landscape. DC is a natural choice for building designers when integrating photovoltaics, batteries, variable frequency drives and LED lighting. [It] massively boosts the power efficiency of commercial buildings.”

    Steve Connolly, CEO Arriba Technologies

    DCIDE Refrerence Design

    Take a closer look at the single line diagram of this design:

    View it now on DCIDE.

    DCIDE is an online DC microgrid design tool that enables concepts to be developed at the speed of thought, with designs easily shared and collaborated on, all supported by a comprehensive DC product catalog.

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