Abstract: A calorimeter for the measurement of a quantity of heat given up by a fluidic medium in at least one heat exchanger, with an impellerless flow velocity measuring device as well as temperature sensors for determining the forward flow-return flow temperature difference, including a multiplier for forming the product from the flow velocity and the forward flow-return flow temperature difference; and also a quantizer for the formation of a pulse train having a frequency which is proportional to the product, as well as a cumulative counting device for the pulses of the pulse train connected to the output thereof.

Abstract: In a measuring device for integral values formed over a time span which is constantly up-dated, the system being one in which pulses represent a fixed quantity of the value being measured, the pulses are stored in a random access memory of a microcomputer with the central processing unit of the microcomputer sequentially addressing individual memory cells, in a repetitive manner after each sweep of the time span.