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6 – Modelling For each simulation series, the temperature profiles in the DHW tank at each time step t were displayed as shown in Figure 6.20, where the numbers represent the temperatures at the individual nodes from i=1 to i=n. The temperature at node no. 1 was kept constant, since the node represented the hot water inlet from the CO2 gas cooler. 1 2 3 4 5 6 ... i ... n-15 n-14 n-13 n-12 n-11 n-10 n-9 n-8 n-7 n-6 n-5 n-4 n-3 n-2 n-1 n t=1 t=2 Figure 6.20 t=3 t=4 t=5 t=6 t=7 t=8 t=9 1 2 3 4 5 6 ... i ... n-15 n-14 n-13 n-12 n-11 n-10 n-9 n-8 n-7 n-6 n-5 n-4 n-3 n-2 n-1 n 1 2 3 4 5 6 ... i ... n-15 n-14 n-13 n-12 n-11 n-10 n-9 n-8 n-7 n-6 n-5 n-4 n-3 n-2 n-1 n 1 2 3 4 5 6 ... i ... n-15 n-14 n-13 n-12 n-11 n-10 n-9 n-8 n-7 n-6 n-5 n-4 n-3 n-2 n-1 n 1 2 3 4 5 6 ... i ... n-15 n-14 n-13 n-12 n-11 n-10 n-9 n-8 n-7 n-6 n-5 n-4 n-3 n-2 n-1 n 1 2 3 4 5 6 ... i ... n-15 n-14 n-13 n-12 n-11 n-10 n-9 n-8 n-7 n-6 n-5 n-4 n-3 n-2 n-1 n Illustration of the principle for reading the outlet water temperatures from the tank when using an indirect method for incorporating mass flow in the tank model. For the lowest water flow rate, the numbers in the bottom cross row in the output file corresponded to the outlet water temperature from the tank at each time step t, i.e. n, n-1, n-2, n-3. n-4 etc. The numbers in the second and third cross rows likewise represented the outlet water temperature from the tank when the water flow rate was twice and three times as high, i.e. n, n-2, n-4, n-6, n-8 etc. and n, n-3, n-6, n-9, n-12 etc. 6.2.2.4 Programming Tools and Input Parameters The tank model was established in the Neutral Model Format, NMF (Sahlin, 1996) and IDA (Equa Simulation Technology Group, 1996). The differential equations as well as definition of variables and parameters 196 1 2 3 4 5 6 ... i ... n-15 n-14 n-13 n-12 n-11 n-10 n-9 n-8 n-7 n-6 n-5 n-4 n-3 n-2 n-1 n 1 2 3 4 5 6 ... i ... n-15 n-14 n-13 n-12 n-11 n-10 n-9 n-8 n-7 n-6 n-5 n-4 n-3 n-2 n-1 n 1 2 3 4 5 6 ... i ... n-15 n-14 n-13 n-12 n-11 n-10 n-9 n-8 n-7 n-6 n-5 n-4 n-3 n-2 n-1 n Tconst. etc.PDF 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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