Installed horsepower

Capacity can vary depending on breaking characteristics and compression strength of each installed horsepower, size of feed, rate of feed, type of fall, and proper operating conditions. 

Typical Manufacturer s Fuel Data on Total Installed Horsepower... 

To simplify the evaluation, it is to the advantage of the purchaser to advise the manufacturer of the dollar cost per installed horsepower in his plant and the operating costs for power. The manufacturer can select, from a wide combination of units, the size and number that are the most economical. Otherwise, the bids should be requested as based on lowest operating cost or lowest capital cost, neither being the best in itself except for certain purposes. 

The factor of 4 increase in (mj) allows Pg/Vi)2 to decrease to 0.3(Eg/F/),. This suggests that the installed horsepower for the full-scale plant would be about a third of that calculated for a conservative scaleup with constant power per volume. This wiU have a major impact on cost and is too large to ignore. The engineer can do any of the following ... 

Utihties consumption estimate 1200 max installed kilovolt ampere 2200°F afterburner temperature 300 installed horsepower 140 gal/min water usage. 

Where c2 is the operation cost per horsepower/day, c2 is the construction cost per inch/mile, c3 is the construction cost per installed horsepower, p(r,T) is the imputed daily cost to the pipeline as a function of interest rate r and project life T. 

ILLUSTRATIVE EXAMPLE 15.9 Determine the hydraulic, brake and installed horsepower required to compress a reactor feed of5000 Ib/h of ethane vapor at 20 psia and 75°F, having a density of 0.105 Ib/ft, to 200 psia. Large compressors typically have efficiencies in the range of 75% to 85% employ a median value of 80% in the calculation. 

Power. There are two main ways to measure the power deUvered by the driver to the pump. The first method is to install a torque meter between the pump and the driver. A torque meter is a rotating bat having a strain gauge to measure shear deformation of a torqued shaft. Discussion of the principle of torque meter operation is available (16). The benefit of this method is direct and accurate measurements. The power deUveted to the pump from the driver is calculated from torque, T, and speed (tpm) in units of brake horsepower, ie, BHP (eq. 4a) when Tis in lbs-ft, and kW (eq. 4b) when T is N-m. 

Cost Data for Kilns Purchase prices, weights, and horsepower requirements of typical units are given in Table 12-21. Installed costs will run to from 300 to 500 percent of purchase cost. Maintenance will average 5 to 10 percent of the total installed cost per year but is dependent largely on the hfe of the refractoiy lining. 

In MESA Ine. s faeility in Satanta, Kansas, expander/eompressor paekages (Eigure 8-4) give the operators a eost savings in horsepower on both ends of the eonfiguration, and a mueh lower initial installation outlay. Without the expanders they would have had the additional... 

Eollowing initial installation in 1971, the Phase 1 expansion turbines have proven extremely reliable. The redesign effort of Phase 2 in 1992 incorporated improved aerodynamics and changed inlet guide vane profiles in the expansion turbines. This redesign yielded an additional. 40 to. 50 Bcf of gas per year without any increase in recompression horsepower. This translates to an increase in propane and butane production of an additional 3,600 to 4,500 bbl of liquid without an increase in electrical power consumption. 

With large power installations of 40 to 50 thousand horsepower compressing flammable gases, this is not usually possible, and each individual item has to be separately tested. A typical situation could be a 40 thousand horsepower gas turbine driving multibody process gas compressors, where the engineering and manufacture involve one contractor and six sub-contractors located in the UK, U.S.A., Japan, and Indonesia. The difficulties of separately testing each sub-unit to ensure compatibility will be compounded by distance and culture. 

Multiply K by the empty-pipe pressure drop to obtain the pressure drop eaused by the Kenies mixer model installation. The theoretieal horsepower required by the Kenies mixer is determined by... 

Depending on the number of stages, the gas that flashes in the lowci pressure separators can be compres.sed and then recombined with the gas from the high-pressure separator. Both reciprocating and centrifugal compressors are commonly used. In low-horsepower installations, especially lor compressing gas from stock tanks (vapor recovery), rotary aiuf vane type compressors are common. 

For this reason, even though they are the most fuel efficient choice for large horsepower needs, large integrals are not often installed in oil and gas fields. They are more common in plants and pipeline booster service where their fuel efficiency, long life, and steady performance outweigh their much higher cost. 

Where hot ambient temperatures are expected, overall turbine efficiency and horsepower output can be increased by installing an evaporative cooler in the inlet. Inlet air flows through a spray of cold water. The temperature of the water and the cooling effect caused by the inlet air evaporating some of the water cools the inlet air. In desert areas where the inlet air is dry and thus able to evaporate more water before becoming saturated with water vapor, this process is particularly effective at increasing turbine efficiency. 

Power costs for fan and pump horsepower, approximate pump efficiency for water, and any special data peculiar to the economics of the installation. This will allow the manufacturer to select a tower giving consideration to the economic factors involved. 

Most installations use water-cooled compressor cylinder jackets however, some use air cooling (usually small horsepower units), and a few use no cooling. For water cooling of the cylinder ... 

Will allow circulation of the borehole regardless of motor horsepower or torque being produced by the motor. Circulation can even take place when the motor is installed. 

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