Building automation – impact on energy efficiency - Siemens ...

Remarks of Siemens
This section outlines how Siemens interprets the functions and processing functions
according to EN 15232:2012.
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2.2
2.3
As a rule, DHW heating with storage tank is considered since considerable energy
losses may arise for improper solutions. Instantaneous water heaters close
to the consumers are normally operated based on demand and have limited
<strong>automation</strong> functions.
1. A defined charging time can minimize the amount of time a higher generation
temperature is required for DHW charging.
1. Due to the reduced operating time, the generator for space heating is operated
over the course of the year at a higher load level and greater efficiency,
thus lowering energy consumption.
2. Electric heating ensures DHW storage tank charging outside the heating period.
Release of the charging time should be set to a timeframe where no
peak loads occur and lower electricity rates are available.
2.5
0. The hot water circulation pipe from the storage tank to the consumer loses
considerable amounts of energy when operating continuously. The storage
tank temperature drops due to the continuous energy losses. Frequent recharging
is required to cover the losses.
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