Open/Closed Loop    

Since Evacuated glass tube technology was invented, solar energy can be changed to heat energy efficiently throughout all four seasons. Solar exposure can be turned to heat regardless ambient temperature of the collectors. Solar Lord Collectors using German design in the tubing and Sydney University coating technology for the absorbing surface. 

The inside and outside tubes are made from extremely strong borosilicate glass which are evacuated and fused together. The vacuum space between two glass layers forms excellent insulation to stop the heat loss from the inside to the outside. The outside of the inner tube is coated with the “Novel Sputtering” coating to absorb maximum solar energy. This coating was developed and patented at Sydney University.
 
When sunlight strikes the collector, the solar radiation goes through the clear glass of the outside tubes and is absorbed by the coating on the outside of the inner tubes. The solar energy is changed into heat energy by the coating surface and heats the inner tube.

Either a heat-transfer fluid or the actual potable water to be used flows through tubes attached to the absorber and transfers the heat from it. The heated water is stored in a storage tank until needed. If additional heat is needed, it is provided by electricity or gas energy.

The Solar Lord hot water system is a ‘pump’ solar system that has circulation of water (direct loop) or glycol mixture (indirect loop) around the solar collector.
The small circulating pump circulates the water between the collectors and the hot water cylinder. The pump is usually operated by a solar controller that only turns the pump on when the water in the collector is warmer than the water in the tank. These pumps are very quiet, offering no noise disturbance and only draw around 28 watts.

In a Heat Pipe collector, the Sun’s energy that is absorbed by the tubes is then transferred to your water via special heat pipes located inside each tube. A small amount of non-toxic liquid is inside each heat pipe. This liquid is turned to gas by the Sun. This gas rises to the tips of the pipes which are inserted into a heat transfer manifold located on your roof. Water is then pumped through this manifold absorbing the heat and stored in a water storage tank located below.  

In a U Tube collector, the copper tube is bent into a U Shape (called U tube) and inlaid into heat transferring fins.  Both copper tubes and a pair of fins sit inside of the evacuated glass tube. When sunlight strikes the collector the solar radiation goes through the clear glass of the outside tubes is absorbed by the coating on the outside of the inner tubes. The solar energy is changed into heat energy by the coating surface and heats the inner tube. Encircled by the inner glass tube the fins transfer the heat from the absorbing surface of the inner tube to the copper U tube. Water flows inside the U copper tube and is heated and piped to the storage tank where it is kept until needed. 

The U tube collectors maximize solar heat gain and minimize heat loss. It has been tested and proven to be the highest efficiency collector available globally. The testing was performed by German laboratory Fraunhofer - the leading laboratory for solar energy in the world.
The result is an incredibly efficient system to harness the heat of the Sun even in extremely cold areas. Because the system is so efficient that it can work in cloudy or even rainy days.

DIRECT HEATING SYSTEM (OPEN LOOP)
E450U45-O, E450U30-O, E340U15-O, E270U15-O, E450H48-O, E450H40-O, E340H32-O, E270H24-O & E180H16
G450U45-O, G450U30-O, G340U15-O and G270U15-O, G450H48-O, G450H40-O, G340H32-O, G270H24-O and G180H16-O

In the open loop system the potable water is directly heated as it circulates by a pump through solar collectors mounted on the roof. The heated water is then stored in a ground-mounted storage cylinder and rises up the cylinder by natural convection to the top of the tank where the hot let is.

INDIRECT HEATING SYSTEM (CLOSED LOOP)
E3002-C, E3001-C, G3002-C & G3002-C

Indirect heating systems use a heat exchanger in the storage tank to complete heat transfer. By using an indirect solar circuit that contains a glycol mixture circulated to solar collectors by a pump, the heat energy produced from the absorbing surface of the collector is transferred to the potable water in the storage tank as the glycol passes through the heat exchanger. The indirect (closed) circuit protects the collectors from freezing and is recommended for areas that are susceptible to frost below -7ºC or harsh water conditions.

Electric or Gas booster

An auxiliary heater is also included in the systems to boost water temperature during periods of continuous rain or overcast. Boosters may run on continuous/off-peak electricity or instantaneous gas to ensure consistent supply of hot water whenever you need.

The electric booster element is suitable for connection to either an off peak or continuous power supply for heating when solar energy is insufficient to meet household requirements. The booster can operate automatically or manually by an on/off switch, or by an external switch - timer.

Solar Lord G series gas boosters achieve energy efficiency rating in excess of five stars, featuring fully automatic controlled gas boosting which only uses gas during periods of low sun rays at the time that you need hot water.