Calpak is renowned for its wealth of technical expertise and heritage in groundbreaking R&D. Since the company’s inception it has been manufacturing state of the art solar thermal products. Today, we remain dedicated to the continuous enhancement of our products, aiming always towards higher efficiency and durability. Our objective is the provision of quality solar solutions that ensure high returns on our clients’ investment.
An immediate challenge for Calpak is to ‘build a case’ for solar thermal energy; to develop efficient and cost effective solar products that can be successful even in a competitive, subsidy-free market. Their solar water heaters are designed to be efficient, present excellent anti-corrosive and anti-freezing properties and are extremely resistant to all possible climatic conditions. Proper maintenance and service is indispensable in order to ensure the solar water heater’s optimal performance.
“Our solar thermal products have unique design, high efficiency and durability, thus longer lifetime. The use of direct enamel (according to DIN 4753/3 ) as a corrosion protection method, combined with the perfect shape of the tank, the practical maintenance port and the technologically advanced selective collectors make Calpak solar water heater far more durable and economical than any competitive product made of stainless steel or steel coated with another type of enamel or with epoxy resins.
In terms of construction composition, particular materials provide the tank with the appropriate thermal insulation and thus the solar water heaters hold hot water throughout the night. The success of the Calpak solar water heaters has been so great that a remarkable number of them are currently installed, supplying many households with hot water,” explains George Xanthopoulos, Export Department.
Their thermosiphonic water heaters have passed the over temperature protection test with no failures, according to the European standards EN 12976-2:2006.
Safety components
The solar water heater Calpak is equipped with all the necessary components ensuring its own security. A safety valve has been placed on the top of the hot water tank in order to limit the pressure in the closed circuit of the system at a nominal pressure of 2.5 bar. Another safety valve has been placed at the domestic cold water inlet of the hot water tank in order to limit the pressure in the tank of the system at a nominal pressure of 10 bar.
Calpak’s solar thermal systems are designed to provide continuous hot water in remote locations where electric power is unreliable, unavailable, or expensive.
The performance of the system depends on the collector technology that produces thermal energy, the thermal transmission design and the tank. The quality of the tank, where hot water is temporarily storaged, is also very important for the lifespan of the system and for hot water retention throughout the night
Xanthopoulos concludes by saying Africa is a very significant market for their products. Calpak sales are growing and the company presence is increasing, as African countries are turning more and more to renewable solutions as solar thermal products. Their products can be found in the following countries: Morocco, Egypt, Uganda, Tanzania, Kenya, Madagascar, Botswana, Namibia, Ghana, Nigeria, and Cameroon. The firm mainly collaborates through distributors on the mentioned countries. When comparing solar thermal products to choose quality ones that offer as much as possible free energy (high efficiency) for as many as possible years (durability).