Oval wheel meter for fuel oil consumption measurement of furnaces
By admin August 12, 2016 3:44 pm IST
Fuel Oil consumption of furnaces can be measured exactly by means of oval wheel meter. The oval wheel meter being a positive displacement meter measures the volumetric flow of the fuel oil to the burner with very high accuracy and there-fore gives a continuous control of the economic consumption of fuel.
Depending on the burner type, there are different installation requirement for metering. The simplest installation consists of one meter only. This installation, however, is only possible if the flow to the burner is equal to the actual consumption and if there is no return flow. For different burner types and installations we can give the following re-commendations:
System with oil-atomizer burner with one oval wheel meter in the suction pipe to the pump
This system has an oil-atomizer burner. However only one meter is installed in this system in the suction pipe to the pump. The fuel oil which is not burnt (consumed) is re-circulated into the oil-feed pipe downstream of the meter. The re circulated fuel is such not metered again. The advantage of this system arrangement is obvious. Only one meter is required directly registering the actual fuel consumption.
As the oil is being compressed by the injection pump it may tend to expand on the recirculation line but will be compressed again in the burner feed pipe. However, separated air which is not dissolved again may form air bubbles or cushions causing burner failure.
System with oil atomizer burner with one oval wheel meter in the oil feed line and one meter in the return line In systems with oil-atomizer burner the fuel pumped through the strainer, meter and pre-heater to the burner. The oil which is not consumed is returned to the oil tank and measured by the meter in the return line. The actual oil consumption corresponds to the difference between the meter registration in the feed lone and the meter registration in the return line.
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