Heating Technology – Heat Pumps
Heating Technology – Heat Pumps

In March 2007 the EU leaders endorsed an integrated approach to climate and energy policy that aims to combat climate change and increase the EU’s energy security while strengthening its competitiveness. They committed Europe to transforming itself into a highly energy-efficient, low carbon economy.

The European targets for 2020 are:

  • A reduction in EU greenhouse gas emissions of at least 20% below 1990 levels
  • 20% of EU energy consumption to come from renewable resources
  • A 20% reduction in primary energy use compared with projected levels, to be achieved by improving energy efficiency.

The resulting Renewable Energy Sources (RES) Directive acknowledges energy from air, water and ground as renewable and heat pumps are recognized as the technology of choice to make it usable.

Heat pump system performance depends on several factors:

Building related factors

  • Building location - climate
  • Nominal Heating demand (building insulation, new / existing construction)
  • Heat distribution system
  • Water temperature set point and heating profiles

Heat pump related factors

  • Compressor technology
  • Type of heat source
  • Type of refrigerant
  • Delta temperature on the heat exchangers (condenser / evaporator)
  • Defrost management

Modern Heat Pump systems must be able to operate efficiently and deliver quality comfort at a wide range of climate conditions. There is a clear trend to move toward a seasonal efficiency concept (SCOP) versus the single point performance rating (COP) in order to better reflect the real operation of the installed equipment (ErP Directive, prEN14825).

Emerson Climate Technologies has developed a full range (from 4-45kW) of heating optimized scroll compressors, with and without vapor injection, to provide seasonal efficient heating capacity and effective domestic hot water production in residential and commercial building applications.

The new Emerson Climate Technologies solution for heat pump applications with capacity modulated compressor developed to deliver outstanding performance and reliability, both in new buildings and boiler replacement scenarios. The new ZHW Copeland Scroll™ Variable Speed compressor features a state of the art brushless permanent magnet motor and Enhanced Vapor Injection technology matched with a highly efficient inverter drive. 

Air to Water Heat Pump System with different compressors