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China ENHeat exchange technology
Cross flow air-to-air heat exchangers and counter flow air-to-air heat exchangers are the core of the Dantherm heat exhanger products.
Heat Exchange - how it works
The two types of Dantherm heat exchangers differ
primarily in the fact that the fluids travel perpendicular to one
another through the exchanger (cross flow) or through the exchanger
from opposite ends (counter flow). The units extract heat from
ambient air, exchanging it with the internal circuit and thus
providing cooling of the warm internal air. All Dantherm heat
Exchangers can be installed without powering down the site and the
emergency mode of the Heat Exchangers 30 and 50 allows these units
to run independently during power outage.
Capacity
When choosing a cooling technology that utilizes ambient air to cool, it is important to understand the concept of delta t (∆t). ∆t = t internal - t ambient. The capacity is stated as e.g. 288 W/K. This means that by a difference in temperature of 1K= 1°C, the cooling capacity is 0,288kW.
Example:
Average ambient temperature: 20°C, desired internal temperature:
25°C = ∆t = 5 (25-20).
Cores of aluminium or plastic
The Dantherm Heat Exchangers feature two types of
heat exchanger cores of aluminium and plastic, respectively,
specially designed and manufactured by Dantherm. The aluminium
plate type heat exchange core is a high-quality core capable of
dissipating up to 180W°K (100W/F). The twin sheet plastic core
ensures benefits such as reduced weight, low noise and high
performance.
Plastic core heat exchangers are commonly criticized for low performance and problems with static electricity. The Dantherm high-performance twin sheet plastic core heat exchangers however, have been designed specifically to overcome these challenges. Special care has been put into obtaining higher and smoother air flow, less pressure drop and low velocity change. Internal air paths are designed of rifle tube formed channels that mix air at the wall with air at the centre, which gives eminent heat transfer. External air paths are designed for optimal heat transfer still allowing larger particles to pass without clogging the circuit. Finally, the plastic core has been given anti-static treatment, to overcome the problem of static electricity causing build-up of contaminated particles.
Facts:
Heat Exchanger
Closed loop cooling
Stepless fan speed control
CFC and refrigerant free
Light-weight plastic core
Filterless design
