link to animation:
http://www.idiomorf.nl/enegiebesparing_werking_zonneboiler.html
maandag 20 december 2010
maandag 13 december 2010
zondag 12 december 2010
donderdag 9 december 2010
woensdag 8 december 2010
Explanation of plan solar collector system
The controller (Deltasol BS Plus) controls the system due to 3 sensors. They measure the temperature of the fluid in the solar collector, in the solar boiler (300l) and in the reserve boiler (200l). If the temperature of the fluid in the solar collector is higher than in the boilers, the controller sends a signal to the circulator pump. The pump makes sure that the coolant starts to circulate through the pipes. If the coolant passes the solar collector the temperature of the fluid will rise. The hot heat exchanger in the solar boiler gives his warmth to the water in the boiler. The boiler can store the heated water till it is needed. For example when you want take a shower.
If the water in the solar boiler has reached the maximum temperature that is required, a three-way valve can close the circulation of the coolant through the solar boiler and lead the coolant through the heat exchanger of the reserve boiler
A Datalogger DL2 is connected to the controller. The collected data of the sensors can be followed on the internet.
There has to be an expansion vessel in the circuit. If the water in the boilers reaches the maximum temperature that is required and the temperature in the solar collector is still climbing, the coolant will evaporate and the pressure in the pipe system will rise. In the expansion vessel is a membrane that separates the coolant and compressed air. If the pressure in the pipe system rises, the membrane in the vessel can expand, so the pressure in the pipe system can be controlled.
The gas burner has two functions. It takes care of the heating in the house and it can also be used to increase the temperature in the solar boiler if there is not enough solar power to heat water in the solar boiler.
The solar collector system is only connected to the warm water system in the house and not the heating system. In a house with floor heating it is possible to connect the solar collector to the heating because low temperature heating is used.
zaterdag 20 november 2010
dinsdag 2 november 2010
Plan of solar collector system at my home
I draw a simple plan of the solar collector system at my home. You can find this image also on the internet ( http://94.224.181.103:8081/dl2/live/data.svg ). Only Firefox users can open this link. There are 4 sensors in the system whitch messure the different temperatures in de different parts of the system. You can follow them live on the internet.
maandag 1 november 2010
vrijdag 29 oktober 2010
An evacuated tube solar collector
The solar tube consist of a copper heat pipe. A black copper absorber is attached to the heat pipe. These parts are in a vacuum-sealed solar tube. The heat pipe is hollow and the space inside, like that of the solar tube, is evacuated. The reason for evacuating the heat pipe is not insulation but to promote a change of state of the liquid it contains. Inside the heat pipe is a small quantity of liquid, such as alcohol or purified water plus special additives. The vacuum enables the liquid to boil at a much lower temperature than it would at normal atmospheric pressure. When solar radiation falls the surface of the absorber, the liquid within the heat tube quickly turns to hot vapor rises to the top of the pipe. Water, or glycol, flows through a manifold and picks up the heat, while the fluid in the heat pipe condenses and flows back down the tube for the process to be repeated.
An advantage of heat pipes over direct-flow evacuated-tubes is the "dry" connection between the absorber and the header, which makes installation easier and also means that individual tubes can be exchanged without emptying the entire system of its fluid.
Some heat pipe collectors are also supplied with a built in overheat protection – when a programmed temperature has been reached, a "memory metal" spring expands and pushes a plug against the neck of the heat pipe. This blocks the return of the condensed fluid and stops the heat transfer.
A drawback of heat pipe collectors is that they must be mounted with a minimum tilt angle of around 25° in order to allow the internal fluid of the heat pipe to return to the hot absorber.
How does a solar collector work?
A animated video of how a solar collector works. The most interesting part of the video starts around 1:50.
woensdag 27 oktober 2010
Abonneren op:
Posts (Atom)