TYPICAL PART LOAD PERFORMANCE - 130-400 TONS

70-125 TON RTAA COMPRESSOR LOADING

STEP = STEP UNLOADER VALVE                

VARIABLE = VARIABLE UNLOADER VALVE

Optimum Efficiencies 

Unsurpassed Full Load Efficiency 

Precise Rotor Tip Clearances

Higher energy efficiency in a helical rotary compressor is obtained by reducing the rotor tip clearances. This reduces the leakage between high and low pressure cavities during compression. Precise rotor tip clearance is achieved with the latest manufacturing and machining technology. Trane is the first helical rotary compressor manufacturer to electronically check compressor parts machining accuracy as part of the standard production process.

Optimized Compressor Parts Profiles

Rotor and slide valves are unique designs, optimised for the air conditioning application. The rotors are designed for the pressure ranges in the air conditioning application. The unloader valve has a unique profile that resulted from computer performance modeling in typical part-load situations.

Advanced Heat Transfer Surfaces 

Condenser and evaporator tubes use the latest heat transfer technology for increased efficiency.

Great Part Load Efficiency With Trane Helirotor™ Compressors And Electronic Expansion Valve

Trane Helirotor Compressor Means Superior Part Load Performance
The air-cooled Series R chiller has great part-load performance. The slide valve on the "intermediate compressors" has a Trane designed profile that resulted from computer performance modeling in typical part-load situations. The combination patented unloading system on the "general purpose" compressor utilizes the variable unloading function similar to that of the slide valve.   The "general purpose" valve also uses a step unloader valve which is a single unloading step to achieve the minimum unloading point of the compressor. The result of both of these designs is optimized part-load performance far superior to single reciprocating compressors.