Solar Hot Water Systems Brisbane – Determining The Difference Concerning Open-Loop And Closed-Loop Systems

The majority of solar hot water systems, Brisbane are classified as either open loop or closed loop. The primary distinction is not difficult to spot.

Closed-loop systems raise the temperature of an antifreeze-water mixture (water and glycol) that exchanges its heat into the household warm water. However, open-loop platforms heat the water that you actually use with Same Day Hot Water Service.

If you live in an area where the temperature stays above the freezing point, you may be able to get away with the less complicated open-loop type. If you live in an area where the temperature stays below freezing for most of the year, you’ll want to go with a closed-loop system.

Batch collectors are the most common open-loop type

Batch collector, or even integral collector storage device, is the most common open-loop type. Within a covered box with two or three times glazing, large-diameter pipework or one or more holding tanks are attached.

Batch collectors are often plumbed into the home’s water supply and fill the hot water heater with warm water, or bypass it when there is enough sunlight. A batch collector’s downside is that it is frequently used as a storage container.

This means that if you don’t utilize your domestic hot water straight away, you’ll lose the heat it contains.

A flat-plate collector shape that flows water into a covered storage container is an even more productive open-loop product. Water is contained in a series of copper pipes put in a heat-absorbing black plate in these protected and robust panels.

A circulator driven by electricity is used in almost all systems, however, photovoltaic pumps are also available.

The thermosiphon system is an open-loop system that includes a collector and a storage container, but it uses convection to carry warmed water throughout the system. The covered reservoir is usually found in the attic area. Water is routed from the attic water tank to the home’s hot-water system.

Solar hot water systems

If you live in an area where it freezes on a regular basis

If you live in an area that freezes on a regular basis, either type of open-loop system can be set up to rotate hot water from the storage reservoir to the collector as the temperature drops to avoid freezing. On the other side, this is risky because it could destroy the system’s hot and cold temperature receptors.

Furthermore, it wastes heat and even consumes electricity; as a result, these types of systems are not suitable for many Australian climates.

Closed-loop systems are inherently more complex than open-loop systems. The warmed antifreeze-water mixture in the system passes via a collector and into a coil within a water tank.

The coil warms the household water within the reservoir. Only the opposite occurs in the drain back system. Within it, heated water flows into the container, transferring its warmth to the coil’s domestic water supply.

The system, which typically uses sterilized water or a combination of water and glycol, was designed so that the collector only provides drinking water after the circulator is running. Water empties into the storage container when the circulator is turned off.

The style is popular in cold climates because it prevents the system from freezing.


A well-insulated storage container is required for the majority of solar hot water systems. Solar storage containers provide an additional exit as well as an intake to and from the collector.

The solar water heater preheats normal water before it reaches the regular hot water heater in two-tank systems. The true backup heating unit and solar storage are merged in a single container in one-tank systems.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.