Danfoss VLT 6000 HVAC User Manual

VLT
®
6000 HVAC
9MG.60.B1.02 - VLT is a registered Danfoss trademark
Introduction to
HVAC
Example with varying flow over 1 year
The example below is calculated on the basis of pump
characteristics obtained from a pump data-sheet. (45
kW). The same examples of calculations can be used
in the case of fan characteristics.
The result obtained is savings in excees of 50% at the
■
Energy savings
This figure compares flow regulation via valves and
without speed control with flow regulation via a
frequency converter.
P
shaft
= P
shaft output
Flow distribution over 1 year
given flow distribution over a year, corresponding to
8,760 hours.
Typically, the example calculated below results in a
pay-back period of one year - depending on the price
per kWh and the price of the frequency converter.
m3/t Distribution Valve regulation Frequency converter control
% Hours Power Consumption Power Consumption
A
1
- B
1
kWh A
1
- C
1
kWh
350 5 438 42,5 18.615 42,5 18.615
300 15 1314 38,5 50.589 29,0 38.106
250 20 1752 35,0 61.320 18,5 32.412
200 20 1752 31,5 55.188 10,0 17.520
150 20 1752 28,0 49.056 6,5 11.388
100 20 1752 23,0 40.296 3,5 6.132
ΣΣ
ΣΣ
Σ
100100
100100
100
87608760
87608760
8760
275.064275.064
275.064275.064
275.064
124.173124.173
124.173124.173
124.173
Pump characteristics

Danfoss VLT 6000 HVAC Specifications

General

Brand	Danfoss
Model	VLT 6000 HVAC
Category	DC Drives
Language	English