CHP Unit Coolant Recirculation

This application note provides an overview of the successful use of magnetically coupled external gear pumps in the recirculation of water coolant within small-scale Combined Heat and Power (CHP) units.

THE INDUSTRY

A company that applies its expertise in small, efficient CHP units is committed to developing alternative solutions to address the challenges of reducing emissions, increasing fuel efficiency and improving energy security in the domestic home heating and electrical power generation market.

THE APPLICATION

Innovations in fuel cell technology have led to the development of small-scale CHP units that incorporate fuel cells and offer energy efficiency. Gear pumps are used in the recirculation of de-ionized (ultra pure) water coolant within CHP units and to meter the flow of the water coolant. The smooth flow and accurate metering of the pump, equipped with a system of feedback, provides developers with essential data for evaluating the operating efficiencies and heat transfer characteristics of CHP units

THE PUMP SOLUTION

Micropump GA Series suction shoe design gear pumps are direct coupled to a brushless 24VDC motor with control of the input speed and a tachometer for feedback of the actual motor speeds.

FEATURE	ADVANTAGE	BENEFIT
External Gear Pump Design	Smooth, pulse-free flow	Easy to monitor, easy to control
	Simple to service and maintain	Reduced downtime and less production lost
	Accurate, pulse-less output	Consistent metering of components
	Shoe suction style gear pumps self compensate for wear	Highly efficient at high temperatures
Magnetic Coupling	Containment of the pumped fluid	Reduced leakage for components
	No rotating seals to fail	Extended pump operation between servicing means reduced downtime
	Leak free pumping	No cross contamination of the pumped fluid
	Feedback of pump speed	Feedback of inner driven magnet speed
Inverter Controlled Permanent Magnet DC Motors	Motor output speed can be easily adjusted	Accurate metering of components