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

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Remarks of Siemens This section outlines how Siemens interprets the functions and processing functions according to EN 15232:2012. 5. The hot water circulation pipe from the storage tank to the consumer loses a lot of energy when continuously operating. The storage tank temperature drops due to the continuous energy losses. Frequent recharging is required to cover the losses. 36
AUTOMATIC CONTROL 2 DOMESTIC HOT WATER SUPPLY CONTROL BT Reason for energy savings 2.4 Control of DHW storage temperature with solar collector and heat generation DHW storage tank with two integrated heat exchangers. 0 Manual selected control of solar energy or heat generation Control is effected via thermostat. The generator must be preselected: 1 Automatic control of solar storage charge (Prio. 1) and supplementary storage charge The solar collector can recharge any amount of freely available energy up to the maximum DHW storage tank temperature so that the maximum possible share of solar energy is used. Heat generation only supplements the required energy amount to ensure a sufficient DHW temperature at any time. 2 Automatic control of solar storage charge (Prio. 1) and supplementary storage charge and demand-oriented supply or multi-sensor storage management Solar storage tank charging has the highest priority. The remaining, required coverage is provided by the heat generator via demand-controlled supply temperatures thus reducing heat losses in generation and distribution. Multi sensors allow for dividing the DHW storage tank into various zones, ensuring better adaptation to usage. This reduces heat losses in the storage tank. 3 Automatic control of solar storage charge (Prio. 1) and supplementary storage charge, demand-oriented supply, return temperature control and multi-sensor storage management Solar storage tank charging has the highest priority. The remaining, required coverage is provided by the heat generator via demand-controlled supply temperatures, thus reducing heat losses in generation and distribution. Lower return temperature can be achieved through a reduction in the supply volume flow. This is required for condensing boilers, heat pumps, and district heating substations and saves energy. Storage tank management optimized to use only heats storage tank zones required for the respective demand. This reduces heat losses in the storage tank. 2.5 Control of DHW circulation pump Continuous operation, time switch program controlled or demand-oriented on/off 0 Without time switch program 5 Hot water circulates, leading to unnecessary heat losses which have an <strong>impact</strong> on overall efficiency of DHW heating. 1 With time switch program Heat losses in hot water circulation are limited to primary occupancy periods. 2 Demand-oriented control Demand-dependent on water usage (e.g. open/close tap) Heat losses in hot water circulation are limited to current occupancy periods. Use can be determined using consumption measurement or acquiring the circulation temperature. The windshield washer function (periodic pump run, measuring circulation temperature, deciding on whether a pump run is needed) can also be used to determine use. 37
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Page 4 and 5: 6.3 Services.......................
Page 6 and 7: 1.2 What constitutes energy efficie
Page 8 and 9: The consequences include an increas
Page 10 and 11: Update existing buildings Short-ter
Page 12 and 13: German industry can make a number o
Page 14 and 15: Example: Supply and prices The grow
Page 16 and 17: Consequences of the EPBD: To meet t
Page 18 and 19: Content of EN 15232 Standard EN1523
Page 20 and 21: 4 The EN 15232 standard in detail E
Page 22 and 23: Rooms represent the source of energ
Page 24 and 25: Remarks of Siemens This section out
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Page 78 and 79: Simplified calculation method The B
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4.4.2 Overall BACS efficiency facto
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4.4.4 Sample calculation for an off
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4.5.1 Detailed BACS efficiency fact
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4.5.3 Detailed BAC efficiency facto
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E 3.2 E 3.3 b) identification of ar
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E 4.3 E 4.4 E 4.5 establish pertine
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consumption occur. Log all signific
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E 6 3.6 Review of the energy manage
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License The license confirms that t
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5.2 Customer benefits resulting fro
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6 Energy efficiency from Siemens 6.
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6.1.1.2 Desigo PX The Desigo PX bui
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6.1.1.4 Desigo RXC/RXB/RXL Desigo R
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Straightforward operation and quick
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Control room temperature by use Hea
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6.2.2 Energy Efficiency Calculation
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Advantage Services is a comprehensi
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Phase 2 Implement success The follo
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What is Performance Contracting ? 6
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7 Information and documentation We
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7.2 Document index 7.2.1 Literature
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8 Abbreviations and terms 8.1 Abbre
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Siemens Switzerland Ltd Infrastruct
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