Hot Water Storage Vessels
Where you have a number of hot water storage vessels that have exactly the same fuel type and efficiencyof operation, these can be entered into SBEM as one system incorporating the sum total of the storagelosses of the individual storage vessels. In these circumstances it is permissible to aggregate vessels ofdifferent sizes as long as the storage losses are known for all individual vessels.
Storage vessels that are identified by the insulation type cannot be aggregated as the SBEM model derivesan assumption for the storage losses based upon insulation type and vessel size in these circumstances.
Individual systems that vary by way of recirculation systems or by the use of CHP or solar energy cannot beaggregated and should be entered separately.
Instantaneous Hot Water Systems
Multiple instantaneous systems having the same fuel type and assumed efficiency can simply be entered asone system and allocated to all zones as appropriate.
Mike Gordon
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