The amount of head and flow rate of circulating water required by the system
Linear or ground pump
Brand and model of circulator pump
Pump motor power and speed
Gear / flange connection
Diameter of pipes Input and output from the circulator pump
generally at each section of the heating system by dividing kilocalories by **** the flow rate (GPM) or the volume of water circulating in the same section of the heating system (to calculate the diameter of the pipes and the flow rate of the circulator pump required) is obtained.
💠 (heating) Kcal/**** = BTU/***** = GPM
It is also obtained by dividing the kilocalories of each section of the cooling system by the number of **** flow rate (GPM) or the volume of water circulating in the same section of the cooling system (to calculate the diameter of the pipes and the required flow rate of the circulator pump).
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💠 (cooling) Kcal / **** = BTU / **** = GPM
One of the most important and decisive factors in the correct calculation of the required head or pressure of the circulator pump is to pay attention to the gravity and natural flow of water inside the vertical pipes of the heating and cooling system of the building. This means that the only function of circulator pumps, which are used only in closed cooling and heating systems, is to compensate for the frictional pressure drop of the water flow along the pipes, fittings, valves and coils of the building's cooling and heating system. Therefore, the required head of these pumps is usually much less than the head of the water supply pump of the same project, and this effectively reduces the power and power of the circulator electropump motor required by the project. Also, if the REVERSE piping design method is used in For medium and large buildings, the possibility of achieving the minimum required power and power of the circulator pump, as well as the most suitable uniform distribution of water flow in the piping of the heating and cooling system of the building, is provided by circulator pumps.
When calculating the pump head of the cooling towers, despite the fact that part of the water path is open, due to the presence of gravity flow in the return path of the water to the condenser, the same method of calculating the head of the circulator pumps should be used.
< b>❗️ Note: If circulator pumps with **** rpm are used in small and medium buildings, the vibration of the pump and the strong flow of water in the pipes will deprive the residents of the building. If the circulating water pressure or head is not provided by the circulator pump, the cold or hot water of the cooling or heating system will not be able to pass through the pipes and reach the place of the radiator, fan coil or other cooling and heating devices, and if sufficient If there is no volume or flow rate of the relevant pump, the volume of water will not reach the device and the said cooling and heating device will be able to provide cooling and heating with a capacity lower than its actual capacity. Therefore, when choosing the required circulator pump, you can contact the sales experts of Demathezis company.
Also, if the head or flow rate of the circulator pump is over calculated, there is a possibility of water overflow from the open expansion source of the heating or cooling system on the roof of the building. Considering that many buildings in the country have a total floor area of less than **** square meters. and determining the type or model of the water circulation pump of the heating system of those buildings does not require a complex calculation.