Pumps/pumping regenerative

The majority of centrifugal pumps have performance curves with the aforementioned profiles. Of course, special design pumps have curves with variations. Eor example, positive displacement pumps, multi-stage pumps, regenerative turbine type pumps, and pumps with a high specific speed (Ns) fall outside the norm. But you ll find that the standard pump curve profiles are applicable to about 95% of all pumps in the majority of industrial plants. The important thing is to become familiar with pump curves and know how to interpret the information. 

Ultrashort Laser System. To analyze the time evolution of the neutral trimer s configuration a laser system consisting of a titanium sapphire oscillator (Spectra Physics Tsunami) which is pumped by a 12 W argon ion laser, and a Nd YLF-pumped regenerative amplifier system (Quantronix 4800 titanium sapphire RGA) is employed [175]. 

Vaillancourt G, Norris T B, Coe J S, Bade P and Mourou G 1990 Operation of a 1 kHz pulse-pumped Tfsapphire regenerative amplifier Opf. Lett. 15 317-19... 

The equipment needed includes a balance tank, regenerative heating unit, positive pump, plates for heating to pasteurization temperature, tube or plates for hoi ding the product for the specified time, a flow-diversion valve (FDV), and a cooling unit (Fig. 4). Often the homogenizer and booster pump also are incorporated into the HTST circuit. 

Kinetic. Kinetic pumps, which act by impelling a fluid from one location to another, can be centrifugal, regenerative turbine, or special effect (see Fig. 1). 

Mechanical Impulse The principle of mechanical impulse when applied to fluids is usually combined with one of the other means of imparting motion. As mentioned earher, this is the case in axial-flow compressors and pumps. The turbine or regenerative-type pump is another device which functions partially oy mechanical impulse. 

FIG. 10-47 Characteristic curves of a regenerative pump. To convert gallons per minute to cubic meters per hour, multiply by 0.2271 to convert feet to meters, multiply by 0.3048 and to convert horsepower to kilowatts, multiply by 0.746. 

Regenerative Above 100 Marked loss of performance Pumps of this type would not normally be considered for handling fluids with a viscosity greater than 100 centistokes... 

Most large generator designs also incorporate a regenerative FW heating facility where from 20 to 30% of the throttle steam may be withdrawn from the turbine at various points to provide the necessary heating. In addition, the primary steam requirement for the FW pump turbines is extracted from the main turbine at the IP to LP crossover point. 

Rotary kiln incinerators, 13 175-176 Rotary kilns, 15 52-53, 603, 26 611-612 puffing and loss of flame in, 13 182 in thermal waste treatment, 25 833-834 Rotary lobe pumps, 21 73 Rotary molds, 18 50 Rotary regenerative heat exchanger,... 

Impeller wheels for regenerative pumps, pump rotors, laundry system wheels, submersible pump insulation, dry transformer insulation. .. 

Larson et al. (1996) investigated the ability of acute chloroform vapor exposure to produce toxicity and regenerative cell proliferation in the liver of female B6C3F, mice. Groups of 5 animals were exposed to 0, 0.3, 2, 10, 30, or 90 ppm chloroform via inhalation for 6 hours a day for 4 consecutive days. Animals were administered BrdU via an implanted osmotic pump, and cell proliferation was quantitated as the percentage of cells in S-phase (LI) measured by immunohistochemical detection of BrdU-labeled nuclei. 

Determine the efficiency and power output of a regenerative Rankine cycle using steam as the working fluid and a condenser pressure of 80 kPa. The boiler pressure is 3 MPa. The steam leaves the boiler at 400° C. The mass rate of steam flow is 1 kg/sec. The pump efficiency is 85% and the turbine efficiency is 88%. After expansion in the high-pressure turbine to 400 kPa, some of the steam is extracted from the turbine exit for the purpose of heating the feed-water in an open feed-water heater, the rest of the steam is reheated to 400°C and then expanded in the low-pressure turbine to the condenser. The water leaves the open feed-water heater at 400 kPa as saturated liquid. Determine the steam fraction extracted from the turbine exit, cycle efficiency, and net power output of the cycle. 

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