PtH-Power to Heat - Anwendung

PtH - Power-to-Heat modules

Saving of regeneratively created electrical energy in heating systems and district heating systems.

The integration of renewable energies into the energy market is an important constituent part of the energy revolution. For a sustainable implementation, there is a high demand for additional storage capacities in order to be able to compensate for the fluctuations in supply and demand that always arise in the electrical energy market.

Power-to-Heat systems address this issue. Surplus electrical power from renewable energies is efficiently converted into heat and used immediately or stored. The burning of fossil fuels for generating heat is reduced at the same time. The new EEC 2017 supports corresponding "switchable loads" from 01.01.2017.

Areas of application

Large heating systems as well as local heating systems and district heating systems are very well suited to this. Most of these are operated with fossil fuels and in some cases with CHP plants. In the lower and medium power ranges, flow heaters equipped with resistance heating elements are used. The connection to the existing heating network is implemented directly and/or via a heat store.

Operating principle

The Power-to-Heat modules can be equipped with fixed power or with different power stages. The modules can be externally activated in conjunction with the KGM Kuhse Gateway Module. Activation is generally implemented through the energy distribution company in the "balancing energy" periods. The network operator also stipulates the quality of the power regulation.

As soon as the Power-to-Heat module is activated, the heat generator (e.g. gas boiler or CHP) already active is reduced by the same power. This means that fossil fuel is replaced by regeneratively produced electrical power, which would otherwise go unused.

Fig.: Every technical entity that would like to participate in the balancing energy market must demonstrate their capability. Recording and documentation of the double peak curve is required for this.

Structure of Kuhse PtH-module

A Kuhse PtH module comprises primarily a flow heater for nominal voltages of 400 or 690 V. The flow heater is internally composed of a large number of individual elements that are gathered together to form the various power groups. There is also a circulating pump to feed the heated water to the heating system.

The hot water temperature is regulated to suit the stipulations from the heating system with the help of a motorized 3-way mixing valve. The module is equipped with safety devices per DIN EN 12828 (direct heating). A programmed control with operating panel in conjunction with a KGM Kuhse Gateway Module looks after the activation and all control and regulation tasks.

All components are delivered pre-assembled. If the space or access routes are restricted, the module can be disassembled and then reassembled at its final location. The switch and control cabinet can be set-up separately.

PtH – Advantages at a glance

  • Low investment costs
  • Short amortization time
  • Reduction of CO2 emissions through the use of "green" electrical energy
  • Particularly well suited to network bottlenecks as switchable load – promoted by EEC 2017
  • Reliability through well-proven technology from the process industry
  • control and telecontrol technology and tailored equipment from a single source.