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Radiation components

Distribution of heat flows in a partial storage heating system

Results of the investigation into the heat output of partial storage heaters

As part of a joint study by the Technical University of Dresden and Lucht LHZ Elektroheizung GmbH & Co KG, a detailed metrological analysis was carried out to determine the proportions of heat emission (convection and radiation) from a partial storage heater. This analysis is particularly important in order to better understand the behaviour and efficiency of partial storage heaters under different operating conditions.

Test stand and implementation

A special test stand concept was developed for the study and implemented in the indoor climate room of the Combined Energy Lab at TU Dresden. The indoor climate room offers controlled conditions that enable precise and reproducible measurements to be carried out. The tests were carried out under various load conditions in order to obtain a comprehensive picture of the heat dissipation.

Analysing heat dissipation

The analysis focussed on the distribution of heat dissipation between radiation and convection. For this purpose, stationary tests were carried out and the resulting heat flows were calculated using the measurement data obtained.

The following table summarises the analyses carried out:

Measuring point Radiation share Share convection
1 42,0 % 58,0 %
2 40,4 % 59,6 %
3 41,9 % 58,1 %
Mean value 41,4 % 58,6 %


Results and conclusions

The results of the study show that, regardless of the load conditions of the partial storage heater, around 41 % of the heat in the room is emitted by radiation and around 59 % by convection. This means that the partial storage heater emits a significant proportion of the heat directly to the surrounding surfaces (radiation), while the majority of the heat is distributed via air circulation (convection).

These findings are of great importance for the optimisation and development of heating systems. Precise knowledge of heat distribution can help to improve energy efficiency and increase comfort for users.

In conclusion, it can be said that this study provides valuable insights into the functioning of partial storage heating systems and makes an important contribution to the further development of efficient heating technologies.

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