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5 – Experimental Results and formation of air bubbles at the underside of the plates. The latter phenomena had a large impact on the hydrostatic balance of the plates during the tapping mode, since numerous air bubbles were formed in the diffuser. Figure 5.61 shows an example of how the small air bubbles formed a sheet of air at the underside of the flat plate. Figure 5.61 Large air bubbles were formed at the underside of the insu- lating plate during the tapping mode. It was necessary to rebuild the test rig several times and to carry out a large number of preliminary tests before the different flow experiments could be performed as planned. The experimental results can be summarized as follows: ♦ Tapping Test Mode – Open Tank Both insulating plates performed satisfactorily during testing, and no water leakage was observed across the narrow cylindrical gap between the plate and the tank wall at the highest flow rate (36 l/min). The different diameters did not affect the practical perfor- mance of the plates. Figure 5.62 demonstrates how the insulating plates separated the dyed hot water reservoir and the cold water reservoir in the tank. ♦ Tapping Test Mode - Closed, Slightly Pressurised Tank At water flow rates below approximately 0.2 l/s (12 l/min), both insulating plates performed satisfactorily, and there was no cold water flow through the gap between the plate and the tank wall. However, at higher flow rates, the plates got stuck and cold water streamed rapidly to the hot water reservoir. This is illustrated in Figure 5.63. 168PDF Image | Residential CO2 Heat Pump System for Combined
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
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