This paper deals with a numerical method based on the simulation of a 2D tank, for
unsteady and laminar two - dimensional incompressible viscous flow. Navier-Stokes and
Continuity equations are solved in a fluid domain. These equations are discreti
zed by
Finite Differences Method. The pressure is obtained by solving a Poisson equation dealing
with a fictitious velocity field. The Poisson equation is solved by a Finite Volume Method.
The grid is refined by a new method “Adaptive Selective Mesh Refinement” called
“ASMR”.
The research study scenarios water hammer problem that may cause the destruction
of the irrigation pipes, pumping stations and equipmen and part of the irrigation project in
terms Ain Beida and its environs in the north-eastern city of Latakia, whe
re the project
seeks to quench 5,000 hectares of land with water pumped from Lake Dam November 16
occurrence . It consists of four pumping stations in addition to major irrigation systems and
irrigation systems subsidiary. Used in these stations pipes made of steel (Steel) , The
reservoir project's main reservoir is two.
Bently and Water CAD V8 XM Edition we have in this research with the help of the
CD-networking program
Modeling of these stations to save time and effort in the study, are HAMMER V8
XM Edition
Determine Adhamiya pressures and velocities in the case of runoff stable, identifying
pressures Adhamiya in the case of the flow is stable through the development scenario of a
water hammer caused by the sudden closure of the valve irreversibility thus leading larger
than the carrying capacity of pipes and fittings have a high pressure values, and put another
scenario shows the effect of non-use non-return valve in the water hammer occurs, and its
role as a good protection of them Thus leading to high pressures and dangerous far greater
than the carrying capacity of the pipe fittings values, and also used the compressed air
reservoir in the third scenario means other protection from water hammer, and we found
through Adhamiya pressures resulting values that the compressed air tank means better
protection; it has to prevent any increase in pressure values Adhamiya when water hammer
occurs, and kept her on the values that were in the case of steady flow.
In this research, a study of full tank case is carried out. The water
contained in the tank was modeled as two masses following the
recommendations of Eurocode.
Because of the importance of water hummer and it’s big impact in
pumping pipes, an analytical study of water hummer resulting from
the pumping station abruptly stopped working (due to a power
outage on water pipe line that conveys water from groun
d open tank
to three overhead open tanks was conducted, and without means of
protection from water hummer .
maximum and minimum pressure values and the location of each of
them in the network have been identified.
It was found that the pump trip caused a transient state with
negative pressure along the pipe system. The values of maximum
pressure were less than the pressure tube run.
An analytical study was done to explain the
relationship between the performance of gas accumulator, surge
tank and vacuum breaker valve and the profile of the pipe.
The study proved that effectiveness of protection means vary
according to the longitudinal path of pipe.
The basic idea of the research is to deal with the problems facing
floor solar heating systems (high Constituent cost, huge size of the storage tank, difficulty
of implementation ...)in addition to fuel consumption. Despite the use of solar energy
for
the purpose of heating, that does not mean full dispensing for heaters assistance in order to
increase the temperature of water in the days which the intensity of solar radiation is low.
A reactor was designed to produce and rise the productivity of biogas
during anaerobic treatment of cattle dung.
It had a size of 32 cubic meters, constructed and installed. The material used
was a sheet of metal, the unit was put over the land.
The results indicated that the biogas production rate was 0.63 m3/m3, while
the daily average biogas production was 18.81 m3. The results also revealed that
the average percentage of methane content in biogas was 66.3%. The average
colorific value of produced gas was 451440 KJ/day.
The results also showed that, The digested sludge can be used as a good
fertilizer.
