Hp5h3xssbypi17go

J & E Hall’s single screw compressor range

3 November, 2008

HallScrew Technology …

• Manufactured since 1978 • Over 8,000 installed in over 85 countries world-wide • Gained awards for outstanding British design and The Queen’s Award for Technological Achievement • Only three basic moving parts • Single screw positive displacement compressor designed for industrial refrigeration, air conditioning and heat pump systems

Star wheel…

• J & E Hall use low friction composite material “HallPlas” in the compression process to ensure high efficiency and reliability • “HallPlas” material was developed using aerospace technology and can withstand the toughest operating conditions with all types of refrigerant

3 November, 2008

“The HallScrew is a market leader in compressor design” Benefits •

Single screw technology

•

Long established worldwide reputation

•

Award winning design flexibility

•

Engineered for quiet operation

•

Outstanding reliability

•

Superior efficiency

•

Ease of installation

•

Ease of maintenance

•

Wide ranging cooling capacities

•

Economised

3 November, 2008

HallScrew - How it works 1. Suction Gas fills the rotor flutes before they mesh with the teeth on star wheel A. 2. Compression As rotation continues, the gas is sealed within the space created by the rotor flute, the rotor housing and the star wheel tooth.

Continued rotation causes the volume of the rotor flute to reduce, compressing the gas.

3. Discharge As the maximum point of compression is reached, a discharge port is uncovered and all the gas is expelled from the rotor flute. The action illustrated applies to star wheel A. A mirrored action using star wheel B occurs simultaneously on the underside of star B.

3 November, 2008

Main Features Positive Displacement Rotary Compressor Positive displacement means pressure is increased by a reduction in volume. This is the same principle as reciprocating compressors but with a pure rotary motion, hence very little vibration

Single Screw Design This means that the compressor has a single rotor with two “stars” or “gate rotors” as opposed to twin screw compressors which have two screw rotors

Balanced Compression Compression is taking place on both sides of the main rotor which cancels out radial forces on the main Bearings

Continuously Variable Capacity Control (10% or 25% 100%) The compressor can unload STEPLESSLY to pump EXACTLY the correct amount of gas needed to obtain the required refrigeration duty. This is shown to be a much more energy efficient method of capacity control than any stepped method 3 November, 2008

Main Features Continuously Variable Capacity Control (10% or 25% 100%) The compressor can unload STEPLESSLY to pump EXACTLY the correct amount of gas needed to obtain the required refrigeration duty. This is shown to be a much more energy efficient method of capacity control than any stepped method

3 November, 2008

SINGLE SCREW vs. TWIN SCREW Single screw compressor

Twin screw compressor

Free movement of star & small inertia = no power transferred between rotors

x Up to 60% of the power is transferred through the rotors

Withstands marginal lubrication

x Marginal lubrication wears the rotors

Low bearing loads

x High axial thrust & high side load

3 November, 2008

SINGLE SCREW vs. RECIPROCATING Single screw compressor

Reciprocating compressor

Total mechanical parts = 160

x Total mechanical parts = 1,000

Wearing components = 16

x Wearing components = 100

Reduced risk of failure and reduced service and maintenance requirements

High risk of failures and more service frequency required

Extremely long bearing life > 100,000h

x Bearings subject to regular replacement

No alternative moving parts = low vibrations

x Mechanical principle of compression process = high vibrations

Capacity control fitted with cast iron slide valves, therefore extremely robust

x Complex mechanism therefore subject to failure

Robust construction of compressor allows tolerance to liquid droplets inside the compression

Marginal tolerance to liquid droplets and slugging due to delicate mechanical elements

3 November, 2008

HSS Semi hermetic range …designed for high temperature applications 12 models in the range Displacement at 50Hz from 175 – 828m3/h

Features: • • • • • • • • • • • • • • • •

Semi hermetic single screw design Optimised for R134a, R407c & R22 Suction strainer Capacity control system (2 built in solenoid valves) Discharge stop valve Internal relief valve Integral oil separator (HSS 3100 & HSS 3200) Flanged oil separator (HSS 4200) Discharge check valve Suction flange with tail & joint Liquid injection adapter Sight glass (x2) Oil charge 2 pole electric motor with sensor protection Electronic protection (INT 69TM) Economiser connection

3 November, 2008

HSS Semi hermetic range ‌designed for high temperature applications HSS 3100 4 Sizes: 3118, 3120, 3121 and 3122 Displacement at 50Hz: 175/213/250/292 m3/h

HSS 3200 4 Sizes: 3216, 3218, 3220 and 3221 Displacement at 50Hz: 286/343/415/471 m3/h

HSS 4200 4 Sizes: 4221, 4222, 4223 and 4224 Displacement at 50Hz: 508/616/722/828 m3/h

3 November, 2008

HSM/L Semi hermetic range …designed for medium and low temperature applications 12 models in the range Displacement at 50Hz from 175 – 828m3/h

Features: • • • • • • • • • • • • • •

Semi hermetic single screw design Optimised for 404a, R507, R22 & R134a Suction strainer Stepless capacity control system (2 built in solenoid valves) Discharge stop valve Internal relief valve Suction flange with tail & joint Liquid injection adapter Oil drain connection Oil injection connection Oil line fittings (External oil filter, solenoid valve and check valve) 2 pole electric motor with temperature probes Electronic protection (INT 69TM) Economiser connection

3 November, 2008

HSM/L Semi hermetic range ‌designed for medium and low temperature applications HSM/L 3100 4 Sizes: 3118, 3120, 3121 and 3122 Displacement at 50Hz: 175/213/250/292 m3/h

HSM/L 3200 4 Sizes: 3216, 3218, 3220 and 3221 Displacement at 50Hz: 286/343/415/471 m3/h

HSM/L 4200 4 Sizes: 4221, 4222, 4223 and 4224 Displacement at 50Hz: 508/616/722/828 m3/h

3 November, 2008

HSO Open range …designed for refrigeration, air conditioning and heat pump applications 12 models in the range Displacement at 50Hz from 286 – 2486m3/h

Features: • Open drive single screw design • Suitable for all refrigerants including ammonia • Stepless capacity control (2 built in solenoid valves) • Oil drain connection • Oil injection connection • Universal shaft seal (suitable for all refrigerants) • Economiser connection

3 November, 2008

HSO Open range ‌designed for refrigeration, air conditioning and heat pump applications HSO 3200 4 Sizes: 3216, 3218, 3200 and 3221 Displacement at 50Hz: 286/343/415/471 m3/h

HSO 4200 4 Sizes: 4221, 4222, 4223 and 4224 Displacement at 50Hz: 508/616/722/828 m3/h

HSO 2000 4 Sizes: 2024, 2028, 2031 and 2035 Displacement at 50Hz: 853/1273/1728/2486 m3/h

3 November, 2008