The gigacalorie per hour (Gcal/hour) is derivative size from calorie which is unit of measure of amount of the used or made thermal energy. These measurements are performed by means of special devices – heat meters.
Instruction
1. Thermal counters are installed at combined heat and power plant, the regional thermal stations and boiler houses and also at consumers – in residential, public, industrial buildings and constructions. Installation of heat meters in apartments, according to experts, is inexpedient as in the presence of several struts, it is necessary to establish the counter on each of them that will cost very much to residents. Depending on type of the flowmeters attached to them the thermal counters are mechanical, vortex, electromagnetic and ultrasonic. For accounting of an expense of the heat carrier one or two flowmeters are put - on an entrance and an exit of a system of heat supply. It is absolutely optional to consider the spent calories on a leaflet. The counter makes all calculations automatically. The result will correspond to a difference in indications of the heat carrier at receipt in a heating system and at the exit from it. This work is carried out by the special temperature sensors installed on an entrance and an exit.
2. Calculation is carried out by the heatcalculator who is the microprocessor which is constantly fixing heat expense. Heat consumption rates in buildings is calculated on the basis of CONSTRUCTION NORMS AND REGULATIONS and state standard specifications which are approved by local authorities. At the same time the heat meter – only the device which is carrying out registration, calculation and archiving of indicators of a heating system.
3. Practice demonstrates efficiency of use of thermal counters thanks to which it was possible to reduce considerably heatlosses and, respectively – expenses. To install the heat meter the consumer has to receive specifications from the organization delivering thermal energy. Then calculation of the necessary equipment is made then the contract for drawing up the project and carrying out installation works is signed.
4. If for some reason you need to calculate Gcal manually, then it is worth using the equation. Gcal = M1 * (t1-t2)+ (M1-M2) * (t2-tkhv), where M1 – the number of the entering tons the водыt1st temperature of giving on the boiler house. Temperature of an obratka on the boiler house t2.tkhv - temperature of cold water on the boiler house. Simplify the main equation (=h T): Gcal = M1*T1-M2*T2 - (M1-M2) *Тхв