Solar heating System

Solar water heating (SWH) systems use energy from the sun to generate heat that can then be used to heat water for domestic hot water needs, space heating, industrial processes, or pool heating. They are a reliable and cost-effective technology that can help reduce utility bills for homes and businesses.

There are two major types of solar heating systems;

  • Active systems  use circulating pumps to pump either water or a heat transfer fluid through the collectors. Although more expensive than passive systems, they are typically more efficient.
  • Passive systems – do not use a pump to circulate water from the collector to the storage tank or other locations. Instead, they rely on gravity and/or the thermosiphon properties of fluids to circulate the water. These systems are less expensive than an active system but not as effective and not suitable in climates where temperatures fall below freezing.

There are two types of solar heating products.

  • Flat plate solar heating system.
  • Evacuated solar heating system.

For most residential and small commercial hot water application, these systems tends to be more cost effective than using electrical heaters. Capable of delivering necessary quantity of hot water at required temperature;

  • Domestic applications with a temperature range of 500C to 550C .Examples being , flats,houses and apartments.
  • Commercial applications with a temperature range of 600C to 800C. Examples being, Hotels, lodges, hotels, hospitals, dairy.

ACHIEVEMENTS

  • Kolmena Group Ltd been able to supply and install more than 50 units of 300L ,20 units 200L and 20 units of 150L of solar water heaters under Solar Rwanda program. This is an ongoing project.
  • Kolmena Group Ltd is also proud to have distributed more than 365 units of 300L ,55 units of 200L and 49 units of 150L to private clients ;households, hotels and hospitals .
    • 21 units of 300L pressure type SWH of 6,300L capacity installed at the Mirror Hotel, Kigali.
    • 8 units of 300L pressure type SWH of 2,400L capacity installed at Nyabikenke Hospital ,South Rwanda.
    • 15 units of 300L pressure type SWH of 4,500L capacity at UCC Ltd ,Kigali.
    • 5 units of 150L pressure type SWH of 750L capacity installed at Rainbow Hotel (Sanitas), Rwanda.
    • 8 units of 200L low pressure tube type SWH of 10,800L capacity at New Home Free Hotel, Kigali.