Fideris Brand Test and Automation Equipment | Fuel Cell Testing Systems, Fuel Cell Testing Fixtures by Fideris Inc

Thermal Management Details

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Description	A key factor in fuel cell testing is accurate control of the circulating medium used to maintain the temperature of the fuel cell. Utilizing an external source of water/glycol mixture for heat rejection, Fideris^TM Thermal Management Unit provides a temperature controlled supply of heating/cooling deionized water to the fuel cell. Control of the water circulation rate and temperature is provided at the front panel or through Fideris FCPower^TM control software. Cooling of the recirculating DI water is provided by a liquid-liquid heat exchanger with waste heat being rejected to the externally supplied water or water/glycol cooling stream. Heating of the DI water is provided by an onboard heater having materials suited for operation with deionized water. The overall pressure of the deionized water tracks an external pressure inlet port or an optional internal pressure reference can be provided. A user adjustable, highsensitivity backpressure control valve regulates the pressure differential between the deionized supply and return water to prevent the occurrence of high differential pressure conditions. Finally, either the supply water, return water, or an external temperature input may be used as the control temperature input to more accurately control the temperature of the fuel cell. To maintain the quality of the recirculating deionized water, on-board filtration and water polishing is provided through a temperature controlled water polisher. Since deionizing resin beds are not suitable for high temperatures, a water polishing loop cools the DI water to a suitable temperature before the water is filtered and passed through a working and polishing mixed resin beds. In addition to water quality indicators on each resin bed, an analog resistivity meter is used to continuously monitor the quality of the recirculation water. An external, 80 psig source of deionized water must be provided for make-up. The overall (supply and return) pressure of the DI circulation water is controlled by a reference pressure input (typically operated at atmospheric or directly connected to the oxidant reactant gas to track oxidant pressure). An internal computer controlled pressure reference source can be provided as an option. Hardware safety limits and control is a part of every fuel cell test station manufactured by Fideris Incorporated and the Thermal Management Unit lives up to this standard. Overtemperature limit switches provide cutout of the deionized water heater should an element or water overtemperature condition occur. Low water level and low flow switches are used to protect the recirculation pumps and heating elements in the event of the loss of, or flow restriction of the deionized water. Over pressure relief of the deionized water reservoir protects the system from over pressure conditions, while a user adjustable supply water pressure relief protects the fuel cell from high differential pressures. Hardware emergency stops include a front panel button, fuel cell return water overtemperature limit, and external hardware stop inputs and outputs. A unique feature of Fideris^TM thermal management system is the overflow/overcool safety interlock which is designed to protect and cool the stack should an overtemperature condition exist. In the event of a stack return water overtemperature condition the stack cooling water circulation pump is automatically set to a maximum flow setting, the cooling heat exchanger is set to a maximum cooling setting, and power to the water heater is disabled.

Specifications	*Capacity*
	Circulating Medium:	Deionized Water
	Fuel Cell Cooling Capacity:	20 kW
	Fuel Cell Heating Capacity:	8 kW
	Water/Glycol Input Requirements:	30 gpm @ 10C
	Water/Glycol Chilling Unit Required:	20 kW
	*Circulating DI System*
	Circulating DI Flow Control:	0-20 gpm
	Circulating DI Temperature Range:	15C-90C
	Circulating DI Maximum Output Pressure:	50 psi
	Circulating DI Pressure: (Computer controlled reference pressure optional)	Directly connected to reference input
	DI Polishing:	Two on-board disposable mixed resin bed deionizing polishers
	DI Filtration:	Disposable cartridge filter element
	DI Quality Indicators:	One indicator after each resin bed (working and polishing resin)
	Conductivity Probe:	Analog conductivity meter
	*Back Panel Connections*
	Water/Glycol Supply:	1 FNPT
	Water/Glycol Return:	1 FNPT
	Emergency Stop Connections:	Amp Circular Connectors
	Computer Communications:	DB9
	Reference Pressure Inlet:	1/4 Swagelok
	Internal Pressure Reference (Optional):	1/4 Swagelok
	Operating Air Inlet:	1/4 Swagelok
	Drain/Overpressure Relief:	1/2 FNPT
	*Side Panel Connections*
	Stack Heating/Cooling Water Supply:	1 Sanitary Fitting
	Stack Heating/Cooling Water Return:	1 Sanitary Fitting
	External Thermocouple Input A:	Mini-Type K
	External Thermocouple Input B:	Mini-Type K
	*Power Requirement:*	10 kW
	Input Voltage:	208 3 50/60 (220, 230, 440 Optional)

	*Compupter Controlled Parameters*
	DI Recirculating Water Setpoint Temperature
	DI Recirculating Flow
	DI Main Flow Control Valve
	Internal Pressure Reference (Optional)
	*Hardware Emergency Stops*
	Front Panel Emergency Stop Button
	Auxiliary Emergency Stop Input
	Auxiliary Emergency Stop Output
	DI Water Overtemperature Alarm
	DI Heating Element Overtemperature Alarm
	Overflow/Overcool enable/disable
	DI Water actual and setpoint temperature
	DI Supply Pressure
	DI Return Pressure
	DI Polishing loop actual and setpoint temperature
	DI resistivity
	*Front Panel LED Indicators*
	Line Power
	Switched Power
	Emergency Stop
	DI Overtemperature Switch
	*Computer Monitored Parameters*
	Glycol/Water Supply Temperature
	DI Flow
	DI Supply Pressure
	DI Return Pressure
	DI Supply Temperature
	DI Return Temperature
	Internal Pressure Reference (Option)
	DI Resistivity
	Working Resin Status
	Polishing Resin Status
	External Auxiliary Temperature Input (Two)
	DI Overtemperature Limit