How to determine the water flow : Flow formula

How to calculate water consumption

flow parameters:

1. magnitude of the diameter of the pipe, which also determines the further bandwidth.
2. quantity of pipe walls, which determine when internal pressure in the system.

The only thing that does not affect the flow - a communication length.

dimeter If known, the calculation can be performed on these data:

1. Construction material for trubostroitelstva.
2. technology affecting the pipeline assembly process.

characteristics affect the water pressure inside the system and determine the water flow.

If you are looking for an answer to the question of how to determine the flow rate, then you need to learn two calculation formulas which determine the use of options.

1. formula for calculating a day - Q = ΣQ × N / 100.Where ΣQ - annual daily water use per 1 inhabitant, and N - number of residents in the building.
2. formula for calculating an hour - q = Q × K / 24.Where the Q - daily calculation and K - the ratio of SNIP uneven consumption (1.1-1.3).

These simple calculations can help determine the flow rate, which will show needs and requirements of the home.There are tables that can be used in the rating for the liquid.

reference data based water

When using the tables, you should calculate all the taps, bathtubs and water heaters in the home.Table SNIP 2.04.02-84.

standard consumption rates:

• 60 liters - 1 person.
• 160 liters - for 1 person, if the house is equipped by a good water supply.
• 230 liters - for 1 person in the house, where water quality is set and bathroom.
• 350 liters - for 1 person with plumbing, built-in appliances, bathroom, toilet.

Why rely on water SNIP?

How to determine water consumption for each day - not the most demanded information among ordinary residents of the house, but the installers of pipelines, this information is required even less.And increasingly they need to know what is the diameter of the compound and a pressure in the system it supports.

But to identify these indicators need to know how much you need to water in the pipeline.

formula that helps determine the diameter of the pipe and the velocity of fluid flow:

standard rate of fluid in the system without pressure is 0.7 m / s and 1.9 m / s.A speed from an external source, such as a boiler, is determined by the source of the passport.By knowing the diameter determined by the flow rate in communications.

water pressure loss calculation

water loss rate is calculated taking into account the pressure drop on the same formula:

In the formula, L - represents a connection length, and λ - friction loss, ρ - ductility.

friction index varies from these values:

• level of roughness of the coating;
• obstacle in the equipment on the shut-off places;
• rate of fluid flow;
• length of the pipeline.

If you correctly calculate the losses in crisis areas of communications, it is possible to provide a clear pressure in the pipes.

Easy calculation

Knowing the pressure loss, velocity of the fluid in the pipes and the volume of water needed, how to determine the flow rate and the size of the pipeline becomes much clearer.But in order to get out of debt settlement, you can use a special table.

where D - diameter of the pipe, of q - consumption of water consumption, and the V - velocity of the water, I - course.To determine the values ​​need to be found in the table and connected by a straight line.Also determined flow rate and diameter, while taking into account the inclination and speed.Therefore, the easiest way to calculate is the use of tables and graphics.