SPECIFIC HEAT EXTRACTION RATE [W/m] Base load Peak heat Peak cool Month JAN FEB

Question

SPECIFIC HEAT EXTRACTION RATE [W/m] Base load Peak heat Peak cool Month JAN FEB MAR APR MAY JUN OUL 17,7 16,6 16,8 15,2 13,1 10,1 8,1 7,94 9,2 12,3 14,2 16,9 0 0 0 0 0 0 0 SEP ??? NOV DEC 0 BASE LOAD: MEAN FLUID TEMPERATURES (at end of month) [ c] 10 -0,096 0 ,27 0,14 0,78 1,69 3,07 4,09 4,28 3,79 2,38 1,44 0,13 20 2,23 -1,86 -1,98 -1,33 -0,41 0,98 2,01 2,21 1,72 0,33 -0,61 -1,91 Year JAN FEB 4,34 4,24 3,87 4,36 5,16 6,46 7,42 7,55 2,65 2,99 2,83 3,43 4,31 5,67 6,68 6,85 6,34 4,91 3,95 2,62 1,26 1,62 1,49 2,12 3,03 4,41 5,44 5,62 5,13 3,73 2,79 1,47 APR MAY OUN JUL SEP ??? 5,54 4,55 3,2 DEC BASE LOAD: YEAR 20 Minimum mean fluid temperature 2,23 C at end of JAN Maximum mean fluid temperature 2,21 C at end of AUG

Explanation / Answer

These are the results which is nothing but the results of the system'

Here the system is more related to borehole.

In first image, where we saw the specific heat extraction rate( W/m). The name itself suggest that the heat is extracting from the system.

In the second image, the mean fluid temperature is given and in every year, the maximum fluid temperature and minimum fluid temperature is given.

Now,  

In a system, in specific year,

the temperature of system is changing month to month,

So the variable factor in this system is,

1) temperature

2) specific heat extraction

From above factor, you can evaluate the heat capacity for that specific month or year

If you observd the values for mean fluid temperature, the difference of these values between the year is high

For example, take January

For 1st year to 20th year, this values are decreasing form 434 to - 223oc

It is suggesting that it is becoming cooler, and this happens when heat is removed/extracted from system.

Now let us relate this given Mean fluid temperature values with given specific heat retention values, you will find that

When specific heat extraction was less, then you will not find that much Change in Mean fluid temperature values.

For example,

In July and September, the specific heat extraction was less, and hence the change in Mean fluid temperature values( from 1st year to 20th year) are also less for July and September.

The graph representation is shown in 3rd diagram, and you will find that the slope is going downward because the mean fluid temperature is decreasing and specific heat extraction is increasing.  

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