ABSTRACT
The first step toward energy conservation and energy-efficient plant design is a reliable energy audit throughout the plant. An overall heat balance around the plant can only be prepared if the individual loads are accurately measured. The efficiency of the boiler is measured by the ratio of integrated energy flows at points 1 and 2. This is usually done by totalizing the fuel and steam flows over some period of time. The efficiency of the overall utility distribution system is determined by comparing the sum of the individual loads with the total supply at the source. In the mechanical BTU meters, flow is detected by positive displacement or propeller-type sensors and is mechanically transmitted through gear trains. The typical applications for the mechanical BTU meters are in the heating, ventilating, and air conditioning industry and in heat exchanger efficiency monitoring.
