The centrifugal pumps are used to Transfer pressure Transfer energy Transfer speed Transfer temperature
Draw and explain a pump curve illustrating the effects of two matched constant speed centrifugal pumps operating in parallel.
Operating in series are two reversible heat pumps. Heat transfer gives energy to the first cycle from a cold reservoir at 105 K and rejects energy by heat transfer to a reservoir at an intermediate temperature T greater than 105 K. The second cycle receives energy by heat transfer from the reservoir at T and rejects energy by heat transfer to a higher-temperature reservoir at 1200 K. If the heat pump cycles have the same co-efficient of performance, calculate: Low...
Pumps are generally used to increase the pressure of a liquid. This is done by converting rotating shaft work (within the pump) into mechanical energy of the liquid). Within such a pump, the mechanical energy of the liquid is being increased by 3.7 kW, while the pump is expending 5.95 kW of energy. What is the mechanical efficiency of the pump? (cc) BY-NC-SA Niel Crews, 2013
Can someone analyze what happens to pressure, temperature, and mass flow rate through: Turbines, Compressors, Pumps, and Open/Closed Feedwater Heaters?
Problem 1: For the following centrifugal pump parameters determine (a) the manometric efficiency 5 points] and (b) the fraction of total energy converted into pressure energy by the impeller of a centrifugal pump [5 points]. Impeller diameter: 0.1 m Impeller rotational speed: 1000 rpm The differential pressure across the suction and delivery heads: 100 m Speed of fluid flow: 2.5 m/s Impeller blades are curved back at an angle of 30° Frictional losses in the pump amounts to 2 m
9.19 A 0.4-m-diam rotor of a centrifugal compressor for air is needed to produce a pressure ratio of 3.8. Assuming a polytropic efficiency of 0.85, determine the angular speed a, total temperature rise, and adiabatic efficiency. Determine the input power for a mass flow rate of 2 kg/s at 1 atm and 288.2 K. Assume a slip factor of 0.9. ANSWER: 9.19 2133.5 rad/s, 163.2 K, 82.0%, 327.7 kW
04: An Ocean Thermal Energy Converter (OTEC) pumps 200 m/s through a heat exchanger in which the temperature (expressed in Kelvins) drops by 1 %. All the heat extracted is delivered to the ammonia boiler. The ammonia temperature, THT, at the turbine inlet is equal to the mea temperature of the water in the warm water heat exchanger minus 1 K. The temperature, Tcr, of the ammonia leaving the turbine is kept at 10°C by the cooling effect of 250...
The mode of energy transfer between a solid at a temperature Tand an adjacent gas or liquid at another temperature T is commonly referred to as transfer. heat Click if you would like to Shr
A centrifugal air compressor used in a gas turbine receives air at 100 kPa and 300 K and discharges it at 400 kPa and 500 K. The velocity of the compressor's outgoing air is 100 m / s. Ignoring the speed at the compressor inlet. Determine the power required to drive the compressor, in kW, if the mass flow is 15 kg / s. Take the Cp of air equal to 1 kJ / (kg K) and assume that there...
A centrifugal pump is pumping water at a rate of 35.55 gal/min. The pressures at the inlet, and outlet of the pumps are -2.26 psig and 7.715 psig respectively. The outlet pipe is placed 10 inches higher than the inlet pipe. The inlet and outlet diameters of the pipe are 1.85 in and 1.6 in respectively and the torque produced by the pump rotating at 1593 rpm is 3.172 ft.Ibf. Calculate the following in SI units: a) Total head b)...