| |
Round tube mech. expanded (Cu tube/ Al fin) |
Round tube mech. expanded (Al tube/ Al fin) |
Brazed aluminium
(Al MPE tube/Al fin) |
| Required space |
100% |
100% |
28% |
| Tube weight |
100% |
33% - 66% |
33% |
| Heat exchanger weight |
100% |
66% - 83%
|
42% |
| Tube cost per heat exchanger** |
100% |
20% - 40% |
30% |
| Burst pressure |
100% |
47% - 100% |
100% |
| Refrigerant charge in condenser |
100% |
100% - 86%
|
7% |
| Refrigerant side pressure drop*** |
100% |
100% - 150%
|
195% (40kPa) |
| Air side pressure drop |
100% |
100% |
74% |
| Lifetime |
High fin corrosion |
All-aluminium balanced alloy combination |
All-aluminium balanced alloy combination |
| Recyclability |
Separation needed |
No need for separation |
No need for separation |
- Data based on properly designed condensers
- Design conditions:
R404a
Condensing temperature 40ºC
Ambient temperature 25 ºC
Air speed 2.4m/s
* Compensated for increased tube wall thickness to meet burst pressure
** LME prices 28.09.12
*** Optimized pressure drop 40kPa (utilize heat exchanger/keep high COP)
