snakeboy14
If i needed to pump 900,000 litres of water per minute at 1,000 bars (14,500 psi), What horse power motor would I need.
Whats the calculation or equation that you use?
Answer
#Efficiency=shaft horse power/motor horse power
#Motor horse power
=shaft horse power/efficiency
# Shaft horsepower
=GPM * PSI / 1714
[900 000 liter = 237 754.85 gallon [US, liquid]]
=[237 754.85*14500]/1714
=2011344.99 hp
#The efficiency of most pressure washer pumps is about 85% or less,but we will consider 85% efficiency.
# Motor horse power
=2011344.99*100/85
=2366288.22 hp.
!!!!!!!!!!!!!!!!!!!
# It seems to be unrealistic.
# If you want to achieve this feet and make your system full-proof,then you have to go for some other arrangement.
# For flow you have to run the pumps in parallel[at least 3 pumps]
# For 14500 PSI PRESSURE you have to go for booster pumps or you have to run the pump in series.
# It means you have to run the pumps in parallel as well as each pumps have atleast 2 no. of booster pumps in series.
# If you are running this system for continuous plant , then you must have a stand-by system also and lot of inventories of pump spares.Also continuous power supply.
# There is no scope for positive displacement pump like reciprocating,gear,vane,piston ,screw pump or even regenerative turbine pump.These type of pumps are meant for high head-low flow applications.So, you have to go for multi-stages and series network of centrifugal pumps.
How did saab get started?
drewsifer0
How and when did Saab get started and when did GM buy them?
Answer
Until 1990 the company was owned by SAAB, an acronym for "Svenska Aeroplan Aktie(B)olaget" (The Swedish Aeroplane Company), which also included SAAB Aerospace and truck manufacturer Scania. The original Svenska Aeroplan Aktie(B)olaget was started in 1937 with the express purpose of building aircraft for the Swedish air force. After World War II the company's main market for military aircraft declined and after considering other options SAAB decided to move into the passenger car market with Gunnar Ljungström in charge of design. The first car, the Saab 92 was a streamlined steel bodied saloon with a 2 stroke engine driving the front wheels and independent suspension all round. Showing their aviation background the car had, at 0.32, the best drag coefficient of any production car in the world at the time. The 92 name was used as it was the 92nd Saab design, the previous 91 had been aircraft.
Four stroke engines were introduced with the Saab 95 and 96 in 1966 which used a V-4 unit bought in from Ford followed by the Saab 99 of 1967 with a Triumph based engine. This gained an optional turbocharger in 1977. In February 1970, Saab built their 500,000th car. An agreement was reached with Fiat in 1978 to develop a new car platform which became the 1984 Saab 9000 and shared its structure with the Fiat Croma and Alfa Romeo 164.
By the late 1980s Saab were producing more cars than they were selling and in 1989 had 40,000 units in stock. The Arlöv plant was closed but heavy financial losses continued. Talks were opened with Fiat, Mazda and Ford and in January 1990 Saab-Scania moved their passenger vehicle operation to a new company Saab Automobile AB.
General Motors bought half of Saab Automobile on 15th March,1990 for USD600 million with an option to acquire the entire company within a decade. David J Herman became president with Stig Göran Larsson as vice president. Before exercising the option to buy the entire company, GM shared its ownership of Saab Automobile with Investor AB, the main owner of Saab.
Losses continued and the Malmö plant was closed in 1991. A new Saab 900 was launched in 1993 based on the Opel Vectra and in 1995 Saab declared a profit for the first time since 1988.
In March 2005, it was announced that GM would move the production of the next-generation Saab 9-3 from Trollhättan to their Opel plant in Rüsselsheim, Germany. Current models are the 9-3 and 9-5, both of which are manufactured in Trollhättan, Sweden and the Saab 9-7X SUV, manufactured in Moraine, Ohio. The Saab 9-2X, a rebadged Subaru Impreza and manufactured in Japan, was discontinued after the 2006 model year.
Innovations
1958: The GT 750 is the first car fitted with headrests as standard.
1962: Saab becomes the first volume maker to offer diagonally-split dual brake circuits.
1970: Saab introduces a 'world-first' - headlamp wipers and washers.
1971: Heated front seats are introduced, the first time in the world they are fitted as standard.
1971: Saab develops the impact-absorbing, self-repairing bumper.
1972: Saab introduces the concept of side-impact protection bars.
1977: Saab is the first manufacturer to put a turbocharger in a mass production car.
1978: Saab introduces another 'world-first,' the passenger compartment air filter.
1980: Saab introduces Automatic Performance Control (APC), an an anti-knock sensor that allowed higher fuel economy and the use of lower grade fuel without engine damage.
1983: Saab introduces the 16-valve turbocharged engine and asbestos-free brake pads.
1985: Saab pioneers direct ignition, eliminating the distributor and spark plug wires.
1986: The Saab 9000 became the first front-wheel drive car to offer ABS.
1990: Saab introduces a 'light-pressure' turbo.
1991: Saab is the first manufacturer to offer CFC-free air-conditioning.
1992: Saab unveils the 'Trionic' ignition, equipped with a 32-bit micro-processor.
1993: Saab introduces the 'Sensonic clutch' and the 'Black Panel', later to be called the 'Night Panel'.
1993: Saab develops the 'Safeseat' rear passenger protection system.
1995: Saab presents an asymmetrically turbocharged V6 at the Motor Show in Frankfurt, Germany.
1996: Saab introduces active head restraints, which help minimize the risk of whiplash.
1997: Saab fits ventilated front seats and an air conditioned glovebox to their new 9-5, both world-firsts in a passenger car.
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