Measuring heat consumption of domestic heating thermal loads - using flow resistance meters and integration of measurement product

摘要

An arrangement for determining heat consumption of thermal loads is esp. for room heating water systems and measures heat flowing in a given time from the hot water throughput and the inlet and outlet temp. It enables a relatively accurate determination of heat consumption without high technical or financial cost. The time integral of the product of hot water throughput, specific thermal capacity, and temp. difference between hot water feed and return is determined using electromechanical, electronic, or mechanical counters. A flow resistance meter (16,17) is mounted in each of the inlet (12) and return (13) pipes. The measurement value outputs of the flow resistance meters are connected to a differential indicator via measurement transducers (R1,R2) consisting of variable electrical resistances. The two flow resistance meters are of identical dimensions.