Velp Scientifica
– UDK139 Operating Manual
10004762/B5
46
5.3.
Graph of tap water consumption related to the
water flow rate and temperature
The graph below shows the efficiency of the patented Velp titanium condenser
compared to traditional glass condensers.
It is important to underline how the new titanium condenser keeps the temperature of
the distillate below the threshold value (35°C) indicated by the Kjeldahl method
without increasing the tap water flow rate (1l/min).
NOTE:
The Kjeldahl method recommends a maximum distillate temperature of 35°C
in order to avoid loss of nitrogen.
As shown in the graph, a distillate temperature of 34°C is obtained by the titanium
condenser using tap water at a temperature of 31°C. The temperature of the distillate
using a conventional glass condenser would be 41°C under the same conditions.
The titanium condenser is also highly efficiency at low temperatures. With a tap
water temperature of 21°C, a distillate temperature of 27°C is obtained using the
titanium condenser compared to 29.5°C using a conventional glass condenser.
The new titanium condenser reduces tap water consumption to a minimum. In fact
the high thermal exchange means that a tap water flow rate of 0.5 l/min is sufficient
for the analyses to be carried out correctly.
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