To calculate the size of piping for underfloor heating, formulas related to heat transfer and water flow in piping should be used. In the following, the formulas and steps for calculating the piping size for underfloor heating are described:
1 Calculation of heating requirement: First, the heating requirement of the building should be determined based on its dimensions, material and location. For example, for a building with dimensions of 20 x 15 meters and a ceiling height of 3 meters, the heating requirement is about 25 kW.
2 Calculation of the required power for the water heater: To heat the water in the underfloor heating system, the required power for the water heater must be calculated. To calculate the required power for the water heater, you can use the following formula:
Q = m × c × ΔT
In this formula, Q is the required power (watts), m is the mass of water (kilograms), c is the heat capacity of water (4.18 J/g °C) and ΔT is the temperature change (°C). For example, to heat 10 liters of water from 20°C to 60°C, the power required for the water heater is about 2000 watts.
3 Calculation of water flow rate: After determining the required power for the water heater, the water flow rate in the piping must be calculated. To calculate the water flow rate, you can use the following formula:
V = Q / (A × 3600, where in this formula, V is the speed of water flow (meters per second), Q is the power required for the water heater (watts), A is the internal surface area of the piping (square meters) and 3600 is the number of seconds in an hour. Is.
4 Choosing the piping size: After calculating the water flow rate in the piping, you can use the piping size table to determine the appropriate size for the piping for underfloor heating. This table is determined based on the speed of water flow and the amount of piping pressure loss.
5 Checking the performance of the system: after choosing the appropriate size of the piping, the performance of the underfloor heating system should be checked using various simulations and operational tests to ensure that the system works properly and meets the building's heating needs. he does.
In general, to calculate the size of piping for underfloor heating, one should pay attention to the principles of heat transfer and water flow in piping and choose the appropriate size by using relevant formulas and tables.