The figure 1 above presents a crudely simplified centralised water heating sys- em. The system comprises of two heating lines, the first line having one radiator nd the second has four radiators in series. The pressure after the pump (2) is 2 bar, and the flow velocity is 1.2 m/s. or simplicity we can assume the water to be in constant temperature of 60°C. oss coefficients and pressure losses are listed in Table 1, and pipe lengths and iameters are given in Table 2. for the system balancing, the target is to divide the mass flow so, so that 20% f the mass flow goes to the first line (i.e. through radiator R1.1) and 80% of he flow goes to the second line (R2.1 - R2.4): (a) How large pressure loss is needed in the control valve CV1 to get the desired flow rates in the two lines? (b) How large is then the minor loss coefficient of the said valve, Kevi?! (c) How much is the pressure, in bar, at the end of the line at section 4?

This is a calculation only. Energy2d isn’t able to do phase changes as far as I’ve learned. There was a different simulation for this but it is not currently free.   You combine 50g of ice at -10oC with 150g of liquid water at 75oC. After a few minutes, you measure the final equilibrium temperature of all of the H2O to be 35.1 oC. Use this information to “experimentally” determine the heat of transformation of water, Lfusion. cwater=4190 J/kgK, cice=2090 J/kgK   Show all of your work and compare to the accepted value Lfusion=3.33x105 J/kg.

I am doing an experiment on calculate latent heat from a kettle.  I calculate the latent heat against time. I was hoping to see the it would remain constant. So I plotted 2 graphs the mass of evaporated water and the calculated latent heat.  Could you explain to me why my caluclate latent heat graph is a polynomial while the mass change is linear?