Investigation of heat transfer losses
I start the 2015 season by enlarging the solar collector’s area from 2m2 to 4m2. Roof slopes of my house are situated to the East and to the West. The initial plan was to raise the solar collector in such a way that it would be situated to the South.
One section of the collector (2m2) has been heating water for 3 seasons. The collector was situated at 120 centimeters distance from the wall. In order to situate it at 45° angle I would have had to move it at 160 cm distance from the wall. And if I wanted the 30 cm. of protruding roof not to cast a shade upon the collector too early, I would need to move the collector even at 190 cm. distance from the wall… This would mean complex holding construction. Having evaluated future troubles with servicing, I chose the simplest way and put the collector on the ground. There is a 22 meter pipe distance from the collector to the boiler. A solar panel charges 12V 7Ah battery. The system has a 12V pump, which has worked fine for 3 seasons. The collector now looks as follows:
The frame holding the collector is quadrangular, as I will have to remake it when I have a chance. After 3 seasons polycarbonate covering turned a bit yellow, even though the collector itself is holding well. Aluminum pipe connections are watertight. On a sunny day, when I blocked the end of lower pipe and filled the heat exchanger piping with water, all the water in the heat exchange reached the boiling point and evaporated.
The collector is already connected to the Internet (could it be otherwise?)
Dėl stogo dangos keitimo sezonas baigtas anksčiau. Kitiems metams tas pats kolektorius (du trikampiai) bus sumontuotas ant žemės. Vamzdynas pailgės apie 10 metrų, bet pasvirimo kampas bus 45 laipsniai (bus galima reguliuoti) , plotas padidės iki 4 kv. m.
Tested the new controller v1.2 version of the program to work with the network module ENC28J60 intended for data storage server.
The program here- https://codebender.cc/sketch:37555
The server has to be installed emoncms program.
mouse selected area of the desired graph, you can see more detailed information
Čia galite pasiskaičiuoti kada atsipirks Jūsų saulės kolektorius lyginant kolektoriaus kainą su išlaidomis elektrai, kurią naudojate vandeniui šildyti.
19 April 2013. collector is filled with water.
There has been an improved solar control version. The program can write here. PCB is universal and can be adapted to the changing program of your needs. Arduino is the standard 5-key pad (A0) connector 16×2 LCD display (LCD LiquidCrystal (A5, 3, 4, 5, 6, 7)), the display backlight is turned on / off programmatically (D8), connect ENC28J60 network module (CS-D10 SI-D11, D12-SO, SCK-D13), three outputs DS18B20 sensors (D2, D9, A3). Relay connection for A1, A2. The controller is looks like :