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Liquid Desiccant Air Conditioning Component

The thermally activated cooling technology used in the tri-generation system is the SDCS documented in Chap. 6. The SDSC employs a potassium formate solution at a solution mass concentration of 0.65-0.7. A comprehensive SDCS rig schematic and photograph is provided in Figs. 6.1 and 6.3 respectively, along with rig description, experimental set-up, instrumentation, and experimental testing method. Therefore it will not be repeated again, only with respect to the complete tri-generation system testing. The experimental operation of the SDCS in a tri-generation system context is provided in Sect. 7.3.4, and the SDCS operational values are provided in Sect. 7.4.2.

Next, Sect. 7.3.3 describes the instrumentation used in the experimental tri-generation system.

Instrumentation

This section describes the instrumentation used in the experimental tri-generation system. The tri-generation system is made up of the micro-tubular SOFC CHP and liquid desiccant components, therefore their instrumentation are described accordingly.

In the micro-tubular SOFC CHP system, the electrical power output is determined by measuring the voltage and current output. The operating voltage is displayed on the SOFC display panel and the result recorded. The current is measured using a GMC-I CP41 current clamp meter. This is placed over the positive wire connecting the micro-tubular SOFC to the battery pack, and the result recorded. K-Type thermocouples have been placed in the SOFC exhaust gas stream before (T1) and after (T2) the recuperator heat exchanger. The water volumetric flow in the WHR circuit is measured using an RS 1-15 L min-1 piston flow meter. K-Type thermocouples are placed on the WHR circuit at the recuperator heat exchanger inlet (T4) and outlet (T5), and in the water tank (T3). All microtubular SOFC thermocouples are connected to a DT80 DataTaker datalogger. Data readings are recorded every 10 s. The SDCS employs Type-K thermocouples on all desiccant solution and water flows (T6-T11). All inlet and outlet air flows have been instrumented with Vaisalia HMP110 humidity and temperature probes. A DataTaker DT500 datalogger is used to record data from the thermocouples and humidity and temperature probes every 10 s. All outlet air velocities are measured using an RS AM4204 hot wire anemometer. The density of the desiccant solution is measured using a differential pressure density meter with temperature compensation. Further information regarding the SDCS instrumentation can be referred to in Sect. 6.2.1. Details of the tri-generation systems instrumentation and associated accuracy are listed in Table 5.1. Section 7.3.3 has described the instrumentation used in the experimental tri-generation system (SOFC and SDCS). Next, Sect. 7.3.4 describes the experimental method used in the experimental testing and evaluation of the micro-tubular SOFC CHP and novel tri-generation system.

 
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