Designing a flat plate solar collector also involves the type of liquid used, the density, viscosity, flowrate. For example if you are using water you need to know how much water is consumed for end use. Depending upon that need to set a flow rate. Based on the set flow rate and temperature difference you neeed to design the length, diameter of your flow tube. This also depends on the amount of sunshine you receive.

You may have to use heat transfer equations. Conduction and radiation in particular! Use Kern text book for reference.

I agree with above commendation. Suppose the working fluid is water, the overall heat loss for flat-plate collector approx. by 10 W/m2 (a good material), the collector area in m2 = heat loss *(Tout - Tin)/[collector (efficiency - optical efficiency)*solar intensity in W/m2]. See Duffie and Beckman 1998 textbook for details.

For a simple model you can see "Solar Engineering of Thermal Process" (Duffie and Beckman), Chapter 6.

Both the above, gave good ref.

Por supuesto el area del colector solar es función del valor de la latitud del lugar, de la inclinación del colector, necesidades de energía del proyecto entre otros. Por ejemplo en Venezuela en la ciudad de Barquisimeto 10 grados de latitud norte para las necesidades diarias de agua caliente para una familia de 4 personas un colector de 1 metro cuadrados es suficiente.

Por supuesto el area del colector solar es función del valor de la latitud del lugar, de la inclinación del colector, necesidades de energía del proyecto entre otros. Por ejemplo en Venezuela en la ciudad de Barquisimeto 10 grados de latitud norte para las necesidades diarias de agua caliente para una familia de 4 personas un colector de 1 metro cuadrados es suficiente. Certainly the area of the solar collector is function of the value of the local latitude, of the inclination of the collector, needs of energy of the project between others. For example in Venezuela in Barquisimeto's city 10 degrees of north latitude for the daily needs of warm water for a family of 4 persons a collector of 1 meter squared is sufficient.

Certainly the area of the solar collector is function of the value of the local latitude, of the inclination of the collector, needs of energy of the project between others. For example in Venezuela in Barquisimeto's city 10 degrees of north latitude for the daily needs of warm water for a family of 4 persons a collector of 1 meter squared is sufficient.

it is depend on your flew your location setup, the Sun radiation,and efficiency of collector! For instance if you need to have fluid with70 C and flew= 10mlit/second you should have 2 collector 1*2

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Elias. A flat collector generally his efficiency can be in 50 per centlias.

for 2meter square flat plate collector (water is working fluid) the instantaneous rise in temp. is approx 5 deg C (inlet = 30C outlet = 35 C) at solar radiation >700 W/sec and flow rate is 0.004 Kg/sec if u want to increase the outlet temperature connect the 2 m2 flat plate collector parallel or series. (refer solar engineering thermal process duffie and beckmen) it may be change with respect to location. the efficiency of the collector depends on flow rate, inlet temperature, inclination and optical efficiency of the system

http://www.solarthermalworld.org/sites/gstec/files/Designing%20of%20solar%20water%20heaters%20Lebanon.pdf

http://www.academia.edu/27951984/Design-and-Construction-of-a-Serpentine-Solar-Flat-Plate-Collector-1-1-2.pdf

http://www.ijssbt.org/volume3.2/pdf/5.pdf

https://www.ipfw.edu/dotAsset/f1cc8708-a3f3-40dc-912c-0579a5afcacd.pdf