FRENSHAM MILL
SUSTAINABILITY PROJECT
FROM HISTORIC CORN MILL TO HYDROELECTRIC HOME.
  • Home
  • Hydropower
    • Live Feed
    • Estimating power potential
    • Evaluation of alternatives
    • Process
    • Need for new channel
    • Control system
    • Time series
    • Economics of hydro
    • Highs and lows
  • Heat Pumps
    • How does a heat pump work?
    • Water source heat pump
    • Economics of heat pump
  • History
    • Historical origins
    • Victorian heyday
    • Remodelling in 1928
    • Extension & Renovation 2009/12
  • Environment
    • Fish pass
    • River bank restoration
    • Wildlife
    • Overall carbon 'payback'
  • Links
  • Blog

How does a heat pump work?

Picture
A heat pump is often described as a fridge in reverse.  The refrigerant is expanded and compressed as in a fridge but the cold loop instead of cooling the fridge, is sent out to be warmed up by a ground loop (typically long lengths of pipe under a field) while the warm water loop is sent off to heat the house. (Diagram - Spirit Solar)
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