Pumps purchase cost

From Eq. (16.14), the base pump purchase cost at a CE cost index of 394 is... 

Purchase costs of pumps, motors and drives are taken from Manual of Economic Analysis of Chemical Processes, Institut Francois du Petrole (McGraw-Hill, New York, 1976). 

Most other metals in the cooling system are subject to similar corrosive influences, although of reduced intensity, as they will have been selected in part due to their more corrosion-resistant (or noble) properties, albeit at a higher purchasing cost. Although some of these metals and alloys may be quite exotic (and therefore more expensive), they will be used because of a particular suitability for heat exchangers or as components for special types of pumps or valves they may also tend to be inherently noble. 

The total fixed capital investment (FCI) for the entire system taking all costs for heat-exchanger equipment, pumps, piping, installation, etc., into account is equal to the initial cost of the catalyst solution plus 4.5 times the purchased cost of the reactor. Assume none of the unreacted materials can be recovered. 

Two centrifugal pumps are being considered for purchase to handle a flow of 140gpm with a required pressure increase of 120psi. Both are nominal 20-HP pumps, which should be adequate for this service. Pump A costs less, but pump B operates more efficiently. Piping, installation, and foundation costs will be the same for either pump. Which pump should be selected ... 

The other choice for a source of vacuum is an electric vacuum pump, which costs about 200, not including the electric motor, purchased... 

Membrane System Hollow fiber flux 25 l/m -hr Recirculation rate 1 m/sec Capital cost 125/ft (Pinto, S., Amicon Corp., personal comm., 1988 Membrane replacement 35/ft (Pinto, S., Amicon Corp., personal comm., 1988) Membrane life 1 year Labor 3 man-hrs/day (inch cleaning) at 20/hr Maintenance 5% of capital Energy recirc. pump Installation cost 10% of Purchased Price Indirect costs 30% of Purchased Price... 

The flow rate can be varied by modifying the cam rotation speed or the position of the piston/cam attachment and, hence, the pumped stroke. This kind of pump, especially the diaphragm-type pump, has often been used in microfluidic systems [27], The main drawbacks are the high purchase cost, flow rates typically in the nL min-1 range, the need for one pump per channel and the susceptibility to air locks and suspended particulate matter [15]. Flow reversal is not possible. 

The economic size for a pipe is the size with the lowest sum of annual charges for thle purchased cost of the pipe and pump and the annual power cost of running the pump or compressor needed to overcome friction. For turbulent flow, this results in an economic velocity which is practically independent jof everything but fluid density it is about 6ft/s for most liquids and about 40ft/s for air under normal conditions. 

If in Exampl 6,17 the fluid were water contaminated with hydrofluoric acid, we would have to use a special corrosion-resistant pipe. Suppose that this pipe had a purchased cost PP exactly 10 times that of carbon-steel pipe. What would be the economic pipe diameter, pressure drop, and pump horsepower ... 

Referring to Table 16.18, the total f.o.b. purchase cost corresponding to an MS index of 514 is 176,900. However, if we provide spares for the two pumps, the total becomes 178,600. From Eq. (16.10), using a Lang factor for fluids processing of 5.7 from Table 16.16 and an updated MS index of 1,110, the estimated total capital investment is... 

Many other specialized pumps are available for services that cannot be handled by radial centrifugal, external rotary gear, and plunger and piston reciprocating pumps. Specialized pumps are not considered here. Purchase-cost data are given next only for the three most commonly used types of pumps. 

For other type centrifugal pumps and other materials of construction, the f.o.b. purchase cost is given by ... 

Figure 163 Base f.o.b. purchase cost for radial centrifugal pumps.

In addition to the size factor, the purchase cost of a reciprocating plunger pump depends on the material of construction. The f.o.b. purchase cost of a reciprocating plunger pump of ductile iron construction and a cost index for mid-2000 (CE = 394) (referred to here as the base cost, Cg), is plotted in Figure 16.6. The cost includes a V-belt drive, but not the electric motor. The cost curve in Figure 16.6 is given by flie equation ... 

In Chapter 3, a vinyl chloride process is synthesized, with a detailed process flow diagram shown in Figure 3.19. In that process, Reactor Pump P-100 takes stream 4 (a mixture of streams 3 and 16) of 263,800 Ib/hr of 1,2-dichloroethane at 90°C and 1.5 atm and delivers it to an evaporator operating at a much higher pressure of 26 atm. Select a suitable pump and electric motor and estimate the f.o.b. purchase cost at a CE index of 400. 

The process system consists of two long-tube vertical evaporators, a draft-tube baffled crystallizer, a rotary-drum vacuum filter, and a direct-heat rotary dryer. Also, pumps are needed to move the solution from evaporator 1 to evaporator 2, to recycle the filtrate from the filter to the crystallizer, and to move the magma from the crystallizer to the filter and a heat exchanger is needed to heat the recycle filtrate. However, the purchase costs for the three pumps and the heat exchanger are not considered here because examples for these types of equipment are presented in Section 16.5. For the equipment considered here, assume fabrication from stainless steel, with a material factor of 2 for the ratio of stainless steel cost to carbon steel cost. For the process, using the following size factors and the equations in Table 16.32, the estimated f.o.b. equipment purchase costs at a CE index of 394 are included in the following table. 

Table 16.32 Purchase Costs (f.o.b.) of Other Chemical Processing Equipment, CE Index = 394. Equations for pumps, compressors, motors, heat exchangers, and pressure vessels are in Section 16.5 ... 

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