Solar Water Heating Drain Back System

Drain back systems are a smart choice when designing a solar thermal system to supplement central heating and domestic hot water components.

Solar water heating drain back system.

The 1k solar water heating system the next 5 entries are for a simple all climate drain back solar water heating system i have been developing and have installed at my place. It s ultimately up to you and your project needs but our system does not need to have a drainback system installed in it in order to work. There are many types of solar hot water systems pressurized closed loop pressurized open loop drain back thermosyphon and variations called direct and indirect referring to the placement of the heat exchanger. The two dominant types today are the pressurized glycol system and.

The way our solar water heater is designed it can be mounted 90 degrees so the water will drain naturally out of the copper tubes. Solar system when there is no longer a demand for hot water. It can also be purchased with or without a heat exchanger. The advantage of a drain back system is built in freeze and overheating protection.

Drain back systems have fewer components than pressurized systems making drain back systems easier to use service and maintain. Solar water heating systems that use only water as a heat transfer fluid are the most vulnerable to freeze damage. The drain back tank ships without a heat exchanger for use with a solar water heater with an internal heat exchanger. There are variations among the variations.

Objectives for the system are. High performance easy construction with simple materials long life and low maintenance all for a price that is about 1 7th of. Understanding solar hot water systems the drain back design. Draindown or drainback systems typically use a controller to drain the collector loop automatically.

Drainback system is one of the popular solar water heating systems whose main advantages over other types are reliability simplicity and low maintenance. If you own this type of system have a solar heating professional check it periodically. The drainback solar water heater is not the simplest and it requires some knowledge time and money to design and build it properly.