16 Heat Flow
Mk8 MM Manual Page | 271
16.2 Expansion Options
The table below shows the Expansion Options used for configuring Heat Flow Metering.
# Default Range Description
Used to enable and define the Heat Flow function as well as enabling a
spare temperature sensor
Steam Flow with Default Values
Steam Flow with Economiser
Steam Flow with Deaerator
Steam Flow with Deaerator and Feed Sensor
Hot Water Flow with Default Values
Hot Water flow with Economiser
Steam Flow from Feed Water Meter
Steam Flow from Feed Water Meter and Feed Sensor
Spare Temperature Sensor Only
Flow: Boiler Standing Losses
The boiler standing losses are known as the heat lost from the boiler
surfaces and pipework through radiation, and is set as a percentage of the
maximum continuous rating of the boiler.
This is the typical losses resulting from top blowdown and bottom
blowdown operations.
Flow: Blow Down Loss Calculation Method
For setting 0, a fixed blow down loss is used in the steam or hot water flow
metering, set in expansion option 122.
For setting 1, the blow down loss will change according to the current
firing rate in the metering calculation.
Loss proportional to firing rate
Flow: Make Up Flowmeter Range
The make-up water flowmeter range is only relevant if the steam flow
metering function has been set with deaerator in expansion option 120.
0.0 – 999.9 litres/s or gallon/s (see parameter 40)
Flow: Condensate Flowmeter Range
The condensate flowmeter range is only relevant if the steam flow
metering function has been set with deaerator in expansion option 120.
0.0 – 999.9 litres/s or gallon/s (see parameter 40)
Flow: Default Feedwater Temperature
If the heat flow function is set for steam or hot water flow metering using
default values, then this default feedwater temperature is used for the
steam or hot water flow metering calculations.
O
C or
O
F (see parameter 40)