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Buildings

  1. Introduction
  2. Condensing Boiler Technology
  3. Insulation
  4. Combined Heat and Power Generation
  5. Low-Energy Houses and Passive Houses
  6. Heat Distribution and Emission
  7. Air-Conditioning Technology
  8. Combining Building Technologies to Best Effect

Heat Distribution and Emission

Reliable and efficient heating of a building requires heat generation and distribution and a tailored heat supply to heat consumers. A building's heat distribution system, which comprises pipework, pumps and line fittings, transports heat from the heat generator to the heat emission point.

The heat emission system, meanwhile, comprises radiators or heating panels and room temperature controls. A comfortable room temperature is easily achieved using the heat radiated by the system.

If the individual components work together efficiently, energy and costs are saved while comfort levels are increased.

Picture
Picture: BMWi

Some key considerations in relation to efficient heat distribution and emission are outlined below:

  • The latest energy-saving heat circulation pumps require less than half of the electrical energy required by conventional, unregulated pumps. Electronically commutated (EC) motor pumps are much more effective than the asynchronous motors used in the past, even when working with partial loads. Since EC motors use permanent magnets and therefore require little or no magnetising current, energy losses are very small.
  • Regulated pumps also eliminate bothersome noises in the heating system.
  • Configurable thermostatic valves enable precise room temperature regulation.
  • Time-controlled and temperature-controlled valves automatically ensure a comfortable level of room temperature.
  • Perfectly proportioned and hydraulically balanced heating systems increase comfort levels and save
    energy.

Individual renovation steps in the area of heat distribution and emission, such as hydraulic balancing, the installation of configurable thermostatic valves or the replacement of old thermostatic heads produce the greatest energy savings per investment cost.

With modern, large-surface radiators, comfort levels are increased, while the temperature of the
working medium in the heating system may be dramatically reduced (low-temperature heating).
Lowering the room temperature also produces significant energy savings. For example, lowering the temperature by 2 °C / 35.6 °F using correctly proportioned and regulated radiators reduces heating costs by up to 12%.


The German government promotes efficient heat distribution and emission through its programme of incentives, including direct subsidies for particularly efficient circulatory pumps