Condenser Approach

CONDENSER APPROACH On a chiller with water cooled condensing, this is the difference between the saturated temperature of the discharge pressure and the leaving condenser water temperature.  On a high efficiency chiller with flooded type condenser, this should normally be no more than 1 to 2 degrees C (1.8 to 3.6 degrees F).  Where historical… Leia mais Condenser Approach

Evaporator Approach

EVAPORATOR APPROACH Evaporator Approach is the difference between the saturated temperature of the suction pressure and the leaving chilled water temperature. Normally, in a high efficiency chiller with a flooded type evaporator, the evaporator approach should be less than 2 degrees C. (3.6 degrees F.). When historical information on a unit is available, it is… Leia mais Evaporator Approach

Correct charge level in chiller with flooded evaporator

DETERMINING CORRECT CHARGE IN A CHILLER WITH FLOODED EVAPORATOR Determining when a Turbocor compressor based chiller is very different as compared to a DX type system. All units should have a nameplate which should include the design charge of the system.  On smaller systems, if there is doubt about the charge, system charge can be… Leia mais Correct charge level in chiller with flooded evaporator

Determine cause of failure – A must

COMPLETE SERVICE MUST  INCLUDE IDENTIFYING THE CAUSE OF ANY FAILURE Training courses offered by Danfoss Turbocor and the various OEM manufactruers that use the Turbocor compressor focus on how to identify and correct problems with the Turbocor compressor. I have frequently seen situations where there is one type or another of a failure, the technician… Leia mais Determine cause of failure – A must

Part load operation

PART LOAD OPERATION ISSUES: One of the very strong features of the Turbocor compressor is its ability to operate at part load conditions. This is particularly true in multiple compressor units where, as the load reduces, one or more compressors can be staged off. It is always preferable for the Turbocor compressors to run part… Leia mais Part load operation

SURGE – What causes it – How to prevent

PREVENTING SURGE: Surge typically occurs when the compressor is operating with a high pressure ratio (PR), or when either the suction or discharge pressure change more rapidly than the compressor controls can adjust the compressor speed (RPM´s) and/ or inlet guide vane (IGV) position. Pressure Ratio (PR) is a number that is calculated based on… Leia mais SURGE – What causes it – How to prevent

SURGE – What is it?

Historically, the author has worked with technicians from Danfoss Turbocor, Multistack and Smardt, Canada, Smardt Australia and Smardt, Germany. The author is aware that there is a higher than normal percentage of compressor failures at certain sites and has discussed these failures with technicians and engineers from various organizations. The conclusion drawn from this set… Leia mais SURGE – What is it?

Purpose of Blog

As technicians that work on a highly sophisticated and complex compressor, in the opinion of this blogger, we are severely handicapped by the lack of really in depth information in the area of determining causes of failures and indicators of potential failures. The Danfoss Turbocor training course is aimed at how to locate, isolate and… Leia mais Purpose of Blog