Heat Dissipater

The heat dissipater is a radiator safety feature. It is specifically designed by GTC for use with BSI Solar installations that are sized for optimal seasonal output (especially summer). The heat dissipater can remove the excessive heat produced during summer periods, or periods of extended non-use. This protects systems from overheating and tripping the overheat/overpressure relief valve and expelling propylene glycol. It can be located in the attic or on the interior/exterior of the house (caution should be used for placement as the dissipater generates heat/ follow your local codes and regulations.) Most china products are made with BSP connections, which is the (UK standard) and they are not interchangeable with NPT (USA standard) as the actual pitch of the thread is different - BSP being 55 degrees and NPT being 60 degrees. All BSI Solar connections are NTP (USA standard).

Key Features of the Heat Dissipater

• >2.3kW heat dissipation capacity* (This is almost twice the heat dissipation capacity compared to our closest competitor for the same price)
• Suitable for glycol systems
• Anodized aluminum fins and outer casing allow for excellent corrosion resistance
• Silver brazed TU-1 (highest quality) copper piping with 1/2"M NTP inlet and outlet (NTP is the US standard type thread)
• Easy mounting on interior/exterior wall or in roof space
• Minimal drop in pressure
• May be used as a simple space heating panel
• Attractive design with Stainless shell cover

* Based on 80°C / 176°F water temp, 40°C / 104°F ambient, no forced air flow.

 

The heat dissipater is installed on the return line from the solar collector. When the temperature in the storage tank exceeds the pre-set limit generally (80°C/176°F), the controller switches a solenoid, which redirects the hot propylene glycol to flow through the heat dissipater before returning back into the storage tank lower coil. This is done automatically through the electronic control unit.

As the hot water passes through the heat dissipater, the heat is then transmitted to the aluminum fins and subsequently to the surrounding air.

Our heat dissipaters have been designed to dissipate 100% of heat produced by our solar collectors during very high ambient temperatures.

The copper pipe to and from the collector should be heavily insulated and caution is to be used as to what types of insulation are used, as certain foam types will melt. The electrically operated solenoid valve prevents the normal flow of the heat transfer fluid through the heat dissipater, thus preventing unnecessary heat loss.