total head loss
length of pipe
diameter of pipe
different pressure between location 1 and 2
different pressure between the suction pipe and the discharge pipe
gravity acceleration
whose unit is meter is the total loss of flow in pipe categorized into 2 groups.
The first type is called major loss, and the second one is known as minor loss.
They can be calculatedby equation 4 and 5.
(สมการ)
according to the above equation, the equation of pumping capacity is as follows :
2.2 Establishing of total cost Equation
There are 5 groups of cost : pipe cost, water pump cost , electricity cost , labor cost for installation, and maintenance cost is each cost is detailed as follows:
2.2.1 Equation of pipe cost
water pipe is considered as a main cost of system.
the depend on diameter and length of pipe.
(graph)
from the figure 2, the y-axis presents the price of water pipe expressed in baht, and the x-axis is volume of pipe matter in m^3.
The cost equation could be formed by plotting the market prices of various pipe size, compared with the volume of each size.
the slope of graph (c1) is obtained to substitute the equation of pipe cot in equation (7)
where
constant value obtained from slope in figure 2
thickness of pipe
diameter of pipe
length of pipe