FASTflo LWH56, Руководство по проектированию установки

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Andrews WH and WHX Water Flow Rates
Performance Chart
Fig No.7
Andrews Model
Temperature Temperature Temperature Temperature Temperature Temperature
Reference
Rise 25ºC Rise 35ºC Rise 45ºC Rise 55ºC Rise 65ºC Rise 75ºC
L sec L min L sec L min L sec L min L sec L min L sec L min L sec L min
WH42,LWH42 0.40 24.0 0.29 17.4 0.22 13.2 0.18 10.8 0.15 9.2 0.13 8.0
WH56, LWH56 0.53 31.8 0.38 22.8 0.30 18.0 0.24 14.4 0.20 12.3 0.18 10.6
WHX56,LWHX56 0.53 31.8 0.38 22.8 0.30 18.0 0.24 14.4 0.20 12.3 0.18 10.6
The flow rate will vary dependant upon the temperature selected at outlet and the incoming water temperature.
The flow rate can be calculated using the following formula or by reference to the charts above.
In addition to the above the maximum flow through each heater is pre-set independent of temperature, maximum flow rate for the
WH42 is 24 L/min and maximum flow rate for the WH56 and WHX56 is 31.8 L/min.
WH42, LWH42 = 42 kW output
WH56, LWH56 = 55.8kW output
WHX56, LWHX56 = 55.8 kW output
(heater output) kW
Δ t (temperature rise) x 4.2 specific heat
Flow rate L/S =
Water flow
at different
temperature
rises