Campare centrifugal pump and reciprocating pump

Campare centrifugal pump and reciprocating pump

SN.	Centrifugal pump	Reciprocating pump
1.	Its speed is high.	Its speed is low.
2.	It gives even flow of liquid.	It gives fluctuating flow of liquid.
3.	It has lower efficiency,at high heads and greater efficiency at low head.	It has lower efficiency,at smaller heads and high efficiency at higher head.
4.	It is suitable for low head and large discharge.	It is suitable for higher heads and smaller discharge.
5.	It can pump dirty water also.	It can pump clear water only.
6.	It is compact and occupies less space.	It requires more space.
7.	It’s initial cost is less.	It’s initial cost is high.
8.	It needs priming.	It does not need priming.
9.	Air vessels are not required.	Air vessels are required.
10.	Operation is quite simple.	Much care is required in operation.
11.	It’s maintenance cost is less.	It’s maintenance cost is more, due to wear and tear.

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problem:- A circular tank of diameter 4m contains water up to a height to 5m. Orifice of diameter 0.5m at the bottom. Find the time taken by water:- 1. To fall from 5m to 2m 2. For completely emptying to tank take cd=0.6

A circular tank of diameter 4m contains water up to a height to 5m. Orifice of diameter 0.5m at the bottom. Find the time taken by water:- 1. To fall from 5m to 2m 2. For completely emptying to tank take cd=0.6

Determine the height of a rectangular weir of length 6m to be built across a rectangular channel. Maximum depth of water on the upstream side of the weir is 1.8 and discharge is 2000 l/sec . Take Cd = 0.6 and neglect end contractions.

Determine the height of a rectangular weir of length 6m to be built across a rectangular channel. Maximum depth of water on the upstream side of the weir is 1.8 and discharge is 2000 l/sec . Take Cd = 0.6 and neglect end contractions.

what is venturi flume - Campare venture meter and orifice meter.

Campare venture meter and orifice meter. Venture meter:- A venturi meter is a tool used to measure the flow rate of a pipe fluid. It cosist of three parts- (1). A short converging part (2). Throat (3). Diverging part It is based on the principle of bernaulli’s equation. Orifice meter:- It is an instrument used to measure the fluid flow rate through a pipe. It's cheaper than a venture meter device. It also operates in the same way as the venture meter principle. Venture flume A venture flume is a critical flow, open flume with a restricted flow, resulting in a fall in the line of hydraulic grade, producing a critical depth. It is used in very high flow rates flow measurements, generally provided in millions of cubic units.

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