Pumps/pumping foundations

CAPACITY AT INLET TEMP DESIGN NPSH REQUIRED AT TOP OF PUMP FOUNDATION FT... 

Cost of air conditioning. Price includes compressor, motor, starter, controls, cooler, condenser, and refrigerant. Does not include cooling tower, pumps, foundations, ductwork, and installation costs. 

Fire Water Pump Foundation (Equipment List and Fig. 19.9) 10 CY... 

NPSH AVAILABLE MEASURED TO TOP OF PUMP FOUNDATION REMARKS —-----------------... 

NPSH AVAILABLE MEASURED TO TOP OF PUMP FOUNDATION REMARKS ... 

EQUIPMENT TO BE SUITABLE FOR OUTDOOR INSTALLATION NPSH — NET POSITIVE SUCTION HEAD TO TOP OF PUMP FOUNDATION MANUFACTURER SHALL SUBMIT THIS SHEET FULLY COMPLETED WITH HIS QUOTATION... 

The base and cement foundation should be examined to verify a correct installation. The pump and motor assembly should rest on a common base. 

The base should be sufficiently strong to withstand the machinery weight and minimize vibrations. Five times the mass is the rule. If the pump, motor, and base plate weighs 1,000 lbs, the foundation should weigh at least 5,000 lbs. 

Don t connect the piping to the pump until the cement base and grouting is fully cured, and all foundation bolts are tightened. 

Pumping or compressor stations are necessary for the transport of material in pipelines. These stations are usually electrically separated from the cathodically protected long-distance pipeline. The concrete foundations are much smaller than in power stations and refineries. Since the station piping is endangered by cell formation with the steel-reinforced concrete foundations, local cathodic protection is recommended. 

More pumps fail as a direct result of improper installation than any other single factor. The predominant reasons for these failures include starvation, caused by inadequate or inconsistent suction conditions distortion, caused by pipe strain or improper foundation and turbulent that results from piping or entrained gas problems. Centrifugal pump installation must follow Hydraulic Institute Standards, which provide specific guidelines to prevent these installation and performance problems. This chapter will address the fundamental requirements for proper installation. 

Centrifugal pumps require a rigid foundation that prevents torsional or linear movement of the pump and its baseplate. In most cases, this type of pump is mounted on a concrete pad or pedestal having enough mass to securely support the baseplate, pump and its driver. The following general mles apply to foundation design. 

Centrifugal pumps, as do most other mechanical equipment, generate dynamic forces that must be absorbed by their foundation. The foundation should have a mass that is at least five times that of the installed pump and driver. In addition, the pump assembly must be properly affixed... 

Installation requirements for rotary positive-displacement compressors are similar to any rotating machine. Review the installation requirements for centrifugal pumps and compressors for foundation, pressure-relief, and other requirements. As with centrifugal compressors, rotary positive-displacement compressors must be fitted with pressure-relief devices to limit the discharge or inter-stage pressures to a safe maximum for the equipment served. 

Figure 51.3 provides an example of a typical work breakdown stmcture. The major divisions define specific, logical task groupings as well as the cost-accounting classifications. In the example, cost should be acquired for the preparation of the foundation, installation and final com-misioning of the pump and motor. In addition, each of the sub-tasks that comprise these classifications are logical groups of tasks that must be completed in sequence and by different work classifications. 

For the designer, the use of a standardised component size allows for the easy integration of a piece of equipment into the rest of the plant. For example, if a standard range of centrifugal pumps is specified the pump dimensions will be known, and this facilitates the design of the foundations plates, pipe connections and the selection of the drive motors standard electric motors would be used. 

Table 16 describes the predicted performance of the GSHP system. Total amount of extracted heat from the ground reaches 180 GJ and electricity consumption is 13.9 MWh. In this time COP ofthe heat pump unit is 4.4. When this system will adopt a constant—speed pump which can cover the maximum heat output, SCOP is 2.7. This result suggests that a variable speed pump according to the heat loads is effective to improve SCOP. On the other hand, released heat into the ground during summer is 56 GJ and the electricity of 3.6 MWh is consumed to circulate the brine between U-tubes in the foundation piles and ventilation units. SCOP during summer is estimated to be 5.7. This can be also improved. 

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