Heatpipe vacuum tubes
Vacuum tube- and Flat plate collector during winter operation
Thermographic display
Direct flow vacuum tubes
Given their specially selected materials and good and stable vacuum, the NARVA vacuum tubes demonstrate excellent properties of application and a high level of customer benefits. The TÜV Rheinland measured the efficiency factor of a customer collector, revealing the following values:
eta 0: 0,781
k1: 1,12
k2: 0,004
The efficiency line of the NARVA vacuum tube is very even, falls only slightly as temperature difference increases. That’s why are collectors, made with NARVA vacuum tubes, especially suited to provide heat support and for applications which require high water temperatures (air conditioning, process heat, drying processes, laundries etc).
With a temperature difference of 100 K compared to the ambient air temperature, the efficiency factor stands at 60%.
Given their specially selected materials and good and stable vacuum, the NARVA vacuum tubes demonstrate excellent properties of application and a high level of customer benefits. The TÜV Rheinland measured the efficiency factor of a customer collector, revealing the following values:
eta 0: 0,781
k1: 1,12
k2: 0,004
The efficiency line of the NARVA vacuum tube is very even, falls only slightly as temperature difference increases. That’s why are collectors, made with NARVA vacuum tubes, especially suited to provide heat support and for applications which require high water temperatures (air conditioning, process heat, drying processes, laundries etc).
With a temperature difference of 100 K compared to the ambient air temperature, the efficiency factor stands at 60%.
