Most commonly used controls modulate the condenser fans to keep the head pressure within a specified range (fixed head pressure or saturated
condensation temperature set-point).
However, as you go up in an atmosphere the temperature decreases, and at some point the temperature drops below the
condensation temperature of a component.
The freon
condensation temperature [t.sub.fc], allowing to estimate the enthalpy [h.sub.3] and pressure [P.sub.c] of freon at the evaporator's exit,
Considering the instability of solar heat source, the generation temperature [T.sub.boi] is in the range of 60-160[degrees]C, the
condensation temperature is 35-45[degrees]C, and the evaporation temperature is -5[degrees]C and keeps being invariable.
Moreover it is able to control the
condensation temperature and thus the heating capacity.
The first observed influence of the
condensation temperature on the formation of the composite was related to the time needed to reach the final value of 1/1 g/g dilutability in water.
As it can be noticed, the
condensation temperature is lower by almost 4[degrees]C at the same conditions of surroundings.
Figure 1 shows the microstructure of the Fe-Cu MLC with the calculated thickness of the iron microlayers of d = 0.23 (m, with the volume fraction of iron [f.sub.Fe] = 0.41, produced at the
condensation temperature of the substrate of [T.sub.s] = 600[degrees]C.
With the TS20-M, flash steam is eliminated and actual steam consumption is drastically reduced thanks to the low
condensation temperature. The exchanger is capable of operating with liquid flow rates of up to 190 kg/s and heat water using steam up to 15Mw with steam at a
condensation temperature of 150[degrees]C.
The largest size has a capacity of 2.5 to 15 MW at a steam
condensation temperature of 300[degrees]F and 2.5 to 9 MW at a steam
condensation temperature of 248[degrees]F.