Solar Heat Exchangers: 5-kL Solar system with 72 m2 Array of Flat Plate Solar Collectors
TOTAL M2 Panels 72
Tank Storage 5,000
Year Commisioned 2009
Tank Construction Steel with non-corrosive lining
High / Low- Pressure Storage High Pressure
Litre / m2 69
Energy Savings / Annum kWh 61,758
SHORT DESCRIPTION OF THE SYSTEM
Solar Heat Exchangers successfully tendered for the design, supply and installation of a 5,000L solar hot water system for the ABI truck drivers ablution & canteen facility in Midrand, Gauteng.
Established in 1987, Solar Heat Exchangers is a leading South African specialist in energy efficient water heating applications and is proud of its reputation for technically superior products and quality workmanship. The company’s products cover various renewable energy and energy efficient water heating applications including process heat, sanitary hot water, space heating and swimming pool heating using solar, heat pumps & gas as a heat source. Solar Heat Exchangers is a wholly owned subsidiary of Solsquare, a company established in 2007 specialising in Solar Photovoltaic system design and installations.
CHARACTERISTIC’S OF THE SYSTEM
The solar system was designed by Solar Heat Exchangers on the basis of supplied usage information by the client. It was determined that 5,000L hot water storage capacity was needed per day.
NEWLY DESIGNED PLANT ROOM FOR STORAGE VESSEL
This ensure optimal functioning of the system and contributes to the financial success of this specific installation.
The existing plant room could not accommodate the new larger insulated hot water storage tank. A new plant room was built to accommodate this. The solar storage tank is heated by an array of 36 x 2sqm flat plate solar collector. This tank pre-feeds the old existing 1,000L electrical backup tank in case of no or low solar contribution.
The plant room is positioned directly beneath the roof on which the solar collectors are mounted however the roof posed a design challenge in that the length of the roof is sloped slightly and facing due east. In order to orientate the collectors properly, a ‘saw tooth’ configuration was decided upon with a flow configuration which allowed for air vents at the highest point of each array.
MAXIMIZING SOLAR THERMAL LOOP EFFICIENCY
The 36 solar collectors are mounted in 6 rows to accommodate the unique roof conditions. These collectors are plumbed in 6 banks of 6 collectors.
Solar Heat Exchangers calls for a new Service Level Agreement annually with the client to maintain the system.
SUMMARY OF THE SYSTEM
An overall good design showcasing how creative thinking and system design can be used to overcome challenges like roof design and orientation. This program was part of the Soltrain initiative to fund demonstration systems to prove the viability and effectiveness of solar thermal.
Tel: 011 462 0024
No 40 Avant-Garde Avenue
Northlands Deco Park