Environmental Engineering Reference
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Figure 26. Daily heat collected for January 1985.
Figure 27. Daily water production for January 1985.
Figure 28 shows the simulation and measured values of the net amount of heat collected
for June. The agreement seems to be quite good. Figure 29 shows the results of the daily
water production for June. It is observed that the simulation result for the water production on
June 1 is low. It appears that this happened because the initial temperature setting of the
accumulator at the start of the calculations was lower than the actual temperatures. On June
24, the actual operation data are missing starting from 11:30 because of a power failure. To
remove the dust on the glass tubes in June, blocks A and B were cleaned on June 4 and blocks
D and E on June 8 while block F was cleaned regularly every 4 or 5 days. In the simulation,
on the other hand, all blocks were presumed to have been cleaned on June 8. In June, the
effect of the dust was significant and it appears that an error was produced due to the
differences between the dust model and the actual dust accumulation. Nevertheless, the value
for the amount of heat collected from June 10 through June 20 match relatively well since by
this data the dust has been removed. As indicated here, there were areas where the simulation
did not match the actual operation status exactly but, overall, the simulation was quite
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