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Why draft tube is used in francis and kaplan turbine and not in pelton turbine?
Wiki User
∙ 9y ago
The Kaplan turbine is a newer, more revolutionary version of the Francis turbine, which came before it. The draft tube is used so that the turbine does not need to be where the water flow is lowest.
Wiki User
∙ 9y ago
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What turbine does not require draft tube?
Draft tube is used to increase the pressure from the low turbine exit pressure to the pressure of the surrounding to which the fluid is rejected.Only reaction turbines require a draft tube as there is low pressure at the exit of the turbine,where as in an impulse turbine the pressure at the inlet and the exit is essentially the same, which is above the pressure to which the fluid is rejected and thus it require no draft tube.
What is the purpose of draft tube in hydraulic turbines?
Draft tube has following purpose :- 1. It makes possible the installation of the turbine above the tail race level without the loss of head. 2. the velocity of water at the runner outlet is very high. By employing a draft tube of increasing cross sectional area, the discharge takes place at a much lower velocity and thus, a part of the kinetic energy that was going as a waste is recovered as a gain in the pressure head, and this increases the efficiency of the turbine. 3.The draft tube prevents the splashing of water coming out of the runner and guides the water to the tail race.
Is forced draft has negative pressure drop?
No, the forced draft fan has positive pressure as it just forces yhe air into the combustion chamber.only the induced draft fan has negative pressureas it removes the flue gases & exhaust gases is stacked up
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1: Brainstorm 2: Rough Draft 3: Proofread/Revise and Edit 4: Final Draft 5: Share (turn in)
What is the primary purpose of invention techniques?
To create a rough draft of an essay.
What turbine does not require draft tube?
Draft tube is used to increase the pressure from the low turbine exit pressure to the pressure of the surrounding to which the fluid is rejected.Only reaction turbines require a draft tube as there is low pressure at the exit of the turbine,where as in an impulse turbine the pressure at the inlet and the exit is essentially the same, which is above the pressure to which the fluid is rejected and thus it require no draft tube.
What are the types of draft tube?
two types of draft tube 1. conical type-> for low powered units 2. elbow type-> used with most turbine installation
What is a draft tube?
Due to high KE at the exit of reaction turbine, there would be a loss of overall reduction in KE. So to prevent this loss, the draft tube is provided which produces nett effect of increasing the pressure head at the expense of KE. So this helps the effective pressure head to increase between the inlet and exit of reaction turbine.
What draft tube in hydro electric power plant?
This is a water conducting system part which provide the path for out let water of turbine that is called draft tube. Er.C.R.Meena Assistant Director (Tech.)
What is draft tube in hydro electric power plant?
This is a water conducting system part which provide the path for out let water of turbine that is called draft tube. Er.C.R.Meena Assistant Director (Tech.)
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He definitely is...
What is the purpose of draft tube in hydraulic turbines?
Draft tube has following purpose :- 1. It makes possible the installation of the turbine above the tail race level without the loss of head. 2. the velocity of water at the runner outlet is very high. By employing a draft tube of increasing cross sectional area, the discharge takes place at a much lower velocity and thus, a part of the kinetic energy that was going as a waste is recovered as a gain in the pressure head, and this increases the efficiency of the turbine. 3.The draft tube prevents the splashing of water coming out of the runner and guides the water to the tail race.
What will happen if a uniform cross section draft tube is used instead of a conical draft tube?
In a Reaction turbine,the Draft Tube is used to reduce the exit velocity loss in order to minimize the exit energy loss. The conical Draft tube ensures this as the diverging area ensures a lower velocity at draft tube exit (since acc. to Q = VxA; the continuity principle,an increase in area renders a decrease in velocity) than its entry point ( at runner exit). A straight (uniform c/s draft tube) draft tube will impart no reduction in the magnitude of exit velocity and thus the employment of a draft tube at the runner exit will be futile.
Use of draft tube in reaction turbine?
1. To reduce velocity/ kinetic energy of water making exit thereby converting kinetic energy to pressure head allowing turbine to be installed above tail pool level. 2. To create negative suction head. 3. Provide added head.
What are the breeds of draft horses?
draft breton dutch draft Irish draft latvian draft
What is the procedure if the Demand Draft is lost?
You can do something about the lost draft if you have the demand draft number. visit the branch where you took the draft and provide them the draft number. Also give them a letter with the draft details (on whose name you took the draft, the date, draft number, amount, payable city etc) and tell them that the draft is lost. As a first step, ask them to block the draft so that, the draft cannot be cashed by someone. As the next step, ask them to either cancel the draft and pay you money or re-issue a fresh draft.
What is procedure if the demand draft is lost?
You can do something about the lost draft if you have the demand draft number. visit the branch where you took the draft and provide them the draft number. Also give them a letter with the draft details (on whose name you took the draft, the date, draft number, amount, payable city etc) and tell them that the draft is lost. As a first step, ask them to block the draft so that, the draft cannot be cashed by someone. As the next step, ask them to either cancel the draft and pay you money or re-issue a fresh draft.
