Wgar

Simple

SDAC=Steain double effect absorption chiller healer WDAC=Water-driven double effect absorption cooler chiller

SDAC=Steain double effect absorption chiller healer WDAC=Water-driven double effect absorption cooler chiller

Outline of test

The PC25C (made by ONSI-TOSHIBA) equips a high grade heat option that allows the recovery of high-temperature water below 120Ae by exchanging heat with the cell cooling water. WGAR utilizes this waste high-temperature water above 8S"C. A cooling capacity device of 150 USRT(527kW) (made by Hitachi) is used in WGAR. The electricity of the fuel cell is connected to the grid. WGAR is used for air-conditioning the main building of the Fundamental Technology Research laboratory of Tokyo Gas. The test flow is shown in Fig. 1.

Temperature control of the high-temperature water is performed at the inlet of the fuel cell. As the temperature of the high-temperature water rises, heat is discharged by means of a cooling module via a heat exchanger. The temperature in the present test was set at &5°C. WGAR is designed not to perform heat exchange with the waste high-temperature water if the temperature of the waste high-temperature water is low.

The present tesl was conducted to assess whether operation of the fuel cell is stable even during non-sieady stale including refrigerator start-up, and to verify the effectiveness of the system.

Test results

Influence of fuel cell on operation

In the present system, the high-temperature water is generated by exchanging heat with the cell cooling water of the fuel cell. The influence of a change in the operating stale including start-up of WGAR on the temperature of the cell cooling water of the fuel cell was examined.

As is evident from Fig. 2, the temperature of the high-temperature waier dropped during ihe start-up operation of WGAR, because the heat was taken from WGAR. As for the temperature of the high-

High-lemperature

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