Pumps and Day Tanks - Critical Fuel Systems

Pumping Systems and Day Tanks Presented By Ken Still, CB Kramer

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Agenda • • • • • • • • • 2

Introduction Basic System Generator Pump Selection Boiler Pump Selection Pump Types and Limits Day Tanks Day Tank Accessories Pump and Day Tank Control Conclusion

Introduction • Pump sets and day tanks typically operate as a single system with a common controller.

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Basic System Monitoring and Control

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Generator Pump Selection • 7 gph per 100KW = GPH • GPH x # gensets = GPH Total • GPH total x 4 = transfer pump size

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Boiler Pump Selection Typical boiler system selection • 30gph per 100 BHP = GPH • GPH x # boilers = GPH total • GPH total x 2.5 – 3 to accommodate boiler mounted pump total flow

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Typical System w Boiler Pumps • Boiler Mounted pump limitations • Tight pump suction limits; 15”hg – 3psi • Boiler pump single point of failure • Boiler pumps requires 2.5-3 times flow rate (sometimes 10-15x more) from transfer pump

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Typical System w Boiler Pumps

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Alternative Boiler System

80 - 90

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Pump Types

SUCTION PUMP SET

PRESSURE (submersible) PUMPS

• Match the pump to the application • Suction or pressure type 12

Pump Sets • Submersible Pumps • Pro • Submerged suction • Simple single tank systems • Simple installation

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• Con • • • • • •

Pressurized in-ground piping Limited sizes Difficult maintenance Unmanned Piping Monitoring Complicated multi-tank redundant systems

Submersible Pump Installation

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Pressure Pump System • Redundancy • Each tank must have redundant pumps

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Pump Sets • Suction Pumps • Pro • Buried piping under suction • Ease of maintenance • Simpler multi tank systems • Simple installation

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• Con • Limited suction ability • Additional floor space

Suction Pump System • Redundancy • A single duplex pump set satisfies redundancy requirement

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Suction Pump Set Options • High Pressure 100psi • Low Pressure