Danfoss iSave 21, Руководство пользователя

Страница: 47 / 106

Data sheet Energy Recovery Device / iSave 21-40
3 521B1116 / DKCFN.PD.003.A4.02 / 01.2012
1. General information
The iSave 21-40 consists of an isobaric pressure
exchanger (PE), a high pressure positive displace-
ment booster pump (BP) and an electric motor.
The isobaric pressure exchangers are based on
the technology used in the Danfoss APP pumps,
and the high-pressure booster pumps are based
on the vane pump principle enabling a very light
and compact design. The design of iSave 21-40
ensures lubrication of the moving parts by the
fluid itself.
All parts included in the iSave 21-40 are designed
to provide long service life with a constant high
efficiency and minimum service required.
The vane pumps are fixed displacement pumps
in which the flow is proportional to the number
of revolutions of the driving shaft – enabling flow
control.
The electric motor provides speed control of
both the pressure exchanger and the high-
pressure booster pump on the same shaft – pre-
venting over spin / over flushing.
The iSaves need a VFD that allows the motor to
apply a constant torque from low speed to
maximum speed.
2. Benefits
• One of the smallest and lightest energy
recovery devices on the market
• Few components
• High efficiency
• No need for high-pressure flow meters
• No expensive high-pressure mechanical seal
• No risk of over spin / over flushing
• Easy modular service
• All parts of the device are made of high
corrosion resistant materials eg super-duplex