Solar Cooling Systems
Contact us now to discuss a cooling solution for your building project! Email: info@SiamGPI.com
Siam Green Power International Co. Ltd. provides Solar Power Systems for private homes and industries.
We offer Design, Project Management, Installation and Maintenance of Solar Power and Renewable Energy Systems.
Our systems are mainly produced in Thailand based on advanced German Technology.
Radiant cooling - the "discreet (room) cooling" - is a sophisticated approach to comfortable, high-efficiency cooling. Due to its low energy consumption it is ideal for combination with solar or wind generated energy.
Hydronic Radiant Cooling (HRC) is very simple. Most conventional systems rely on convection (air movement) to transfer heat generated within an enclosed area and exhaust warm air from the space. HRC systems rely predominantly on radiation to transfer heat. The heat is transferred to cool surfaces - ceilings and floors - rather than being released into the air. With a radiant system, air can actually have a higher temperature than in a conventional system and produce the same perception of comfort.
Comfort relies as much on radiant heat transfer as it does on air temperature. Conventional air conditioning units are only designed to control air temperature. Because radiant energy travels through space without cooling the air itself but rather objects, hydronic radiant cooling systems separate ventilation from thermal conditioning, providing fresh air and conditioning independent from each other.
The human body transfers heat in three different ways: radiation, convection, and evaporation. Thermal comfort is when these three factors are in thermal neutrality. Ideally 50% of body heat is cooled by radiation, 30% by convection and 20% by evaporation (sweat and breathing). With an ideally designed conditioning system, the occupant would not know if it is cooling or heating.
Radiant cooling falls in the "air-and-water" category where the outside air ventilation system provides only the necessary fresh air while the hydronic thermal distribution system with a radiant heat exchanger provides the cooling. Therefore radiant cooling or heating systems address both, the convection and radiation factor of body heat whereas conventional air conditioning mainly address the convection factor by high air circulation.
As an additionnal benefit the GPI concrete core conditioning systems with multipipe tubes embedded in a concrete slab allows for peak load shifting because of its thermal storage capacity. This could be used also as a wall mass.
Because large surfaces are available for heat exchange in hydronic radiant cooling systems (usually almost the whole ceiling or floor), the coolant temperature is only slightly lower than the room temperature. Since the coolant can be maintained at a high temperature level, the use of heat pumps with high coefficient-of-performance values, cooling towers, night cooling, or some combination of these can reduce electric power requirements further.
More benefits:
- Due to the high heat capacity and density of water, thermal energy can be transported in water in pipes by low power pumps, saving approximately 70 to 80% of fan power normally used to condition a building. This alone reduces the peak-power of the air-conditioning system by about 30 to 45%.
- No space conditioning equipment is necessary on exterior walls, and the panel system can use the automatic sprinkler system piping in some multi-family dwellings.
- Radiant cooling is a draft free system
- It eliminates fan-coil and induction unit noise
- Cooling is more evenly distributed,
- Once room surfaces reach a desired temperature they tend to maintain that temperature with relatively little extra energy.
- There is less exfiltration of cooled air when doors or windows are opened.
Since radiant cooling systems are constructed of components from the radiant heating and air conditioning industries, components are widely available. There are however relatively few engineers experienced in residential radiant cooling design. GPI engineers have many years of experience in installing these systems.
Investing in solar power and renewable energy now builds energy independence and moves us towards a healthier future.
Contact us now for a detailed personal quotation.
Email: info@SiamGPI.com
