
       LARTEC11.COM    

 1= DATA INPUT.
 You will notice, "solpara".din  is a default file.

 If you are modifying an existing file, go ahead.

 If you will create a new datafile, but havent namned your file yet, 
 then do it now thru  66=CHOOSE FILENAME.

 The page concist of all the data of your house and heating system, as well 
 as the solar system.

 Fill up with valid data.

 22=  Start with a map, and find out your site latitud. It doesnt matter 
 whether you live on the north or south heimsphere, it will be 0 - 90 degrees 
 anyway.
 The sun walks around the globe in equal patterns at the same latitudes.

 27= Enter data from your solar collector, or choose from "sample of items".
 What is  Eta0,   k0,   k1 ?
 Eta0: is the solar collector maximal efficiency.  Pout/Pin  %.
 k0:   is the solar collector specific heat loss coefficient.  W/m2*C
 k1:   is the second order heat loss coefficient.  W/m2*C*C
 These figures must be acheved from an acredited solar collector testing
 facility.
 28=  Use a compass and calculate the solar collector deviation from south,
 (or north if your location is at the south heimsphere).
 Use a sixtant or equivalent and calculate the minor angle (0 - 90) degrees 
 between the earth and the solar collector. (The mounting steep).
 29=  From the point of solar collector, look for shadowing during the day and 
 type the hours. (only full hours is relevant)

 30=  Estimate the angle from earth to the horizon at south and type in.
 This will mask out shadowing mountains if there is any.
 23=  Fill in the accumulator data. You can only use square shaped design, ie 
 if you intend to use a cylindric container, you have to recalculate the depth, 
 width and height to the correct volume. This may give incorrect accumulaor 
 heat loss, but has no significance.

 About the lambda (insulation capacity):
 Gullfiber, Rockwool mm = 0,04 - 0,05 ( W/m3 x degree )
 Cellular plastic younger than 5 years  = 0,03
 Cellular plastic older than 5 years = 0,04 - 0,05

 24=  Ambient temp = The temperature in the hold(compartement) of the 
 accumulator.
 Mintemp store = This means the lowest temperature you ever will have in the 
 top of the accumulator, or the thermostat meter at your electrical boiler, 
 or oil combustion equippment.

 32= Are you going to use an external or internal heat exchanger? The 
 difference is that
 ext heat exch allows heat to reach directly to the top of the acc, and hence 
 gives faster shower water.
 33= Are you using the acc solely for preheating, and hence no other source of 
 heating will be used to the acc?
 34= Fresh hot water need (shower and cleaning) normally 5000 kWh/year.

 31= Is the solar system gonna heat both shower and heat system? 
 If your solar energy is only for shower heating, then skip the following
 questions: 25, 35, 36, 37.

 25= Heating energy/day * = 
 The full around-the-clock heat energy consumption (kWh) 
 when outdoor temp equals zero C degree flat. (Freezing point). This parameter 
 is important as it affects the temperature of the accumulator, and hence the
 net solar energy. 
 In Sweden a common value is 25 - 50 kWh).

 flow valve temp* at zero deg outdoor temp = what temperature do you need at 
 your heat radiant element when the outdoor temperature is 0 C degrees to 
 maintain acceptable indoor temperature. 
 (In Sweden a common value is 30 - 40 C degrees).
 If you don't know the figure, leave it, the default value is sufficient.

 35= Annual energy consumption in kWh (average year) (only for comparision)
 36= Do you use an automatic flow valve regulator whith an outdoor temperature 
 sensor? If you don't know, type 1.

 37= This is a pointer of your house insulation status, and is valued in the
 lowest outdoor temp possible while still indoor temp is normal, and whithout
 any heating system on.
 If you don't know the figure, leave it at 17, the default
 value is sufficient.

 These values, reflects the house insulation status, and also the heat 
 dissipation capacity of the radiant elements.

 88= save "your_name.din".  Now you will create the datafile just typed in.

 This brings you back to the first menu, where you can start the simulation.

 Good luck

 Stig Larsson
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