Copeland Digital Scroll
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1 Copeland Digital Scroll Technology & Advantages Presented by: Bruce Hilsabeck Application Engineer Copeland Australia / New Zealand Introduction 1. Scroll Compressor Basics 2. Digital Compressor Technology 3. Design Features 4. Operating Envelope 5. Energy Efficiency 6. Precise Load Matching 7. Simplicity 8. Reliability 9. Electromagnetic Interference 10. Online Support 1
2 1. Scroll Compressor Basics Scroll Compressor Compression Area Crankshaft Motor 2
3 Scroll Set Profile Fixed Scroll Comprises Two Scroll Parts Figure 1 Figure 2 Orbiting Scroll How The Scroll Compressor Works 3
4 2. Digital Compressor Technology 4
5 Digital Scroll Technology Variable Capacity Output VRF systems Chiller / HPs Process Chillers Dedicated HPs Rooftops Air-Driers Refrigeration Cond Units Digital Scroll Compressor Variable Capacity Output % Seamless Capacity How the Digital Scroll Modulates The Digital Scroll uses binary modulation. It s either ON (1) or it s OFF (0). 1 Coil is de-energized and the scroll plates close. 0 Coil is energized and the scroll plates open. The switching frequency (or cycle time) of the pulse is between 10 and 20 seconds. Capacity modulation is a product of time/state or PWM. The capacity of the Digital Scroll is 10% to 100% with infinite steps. 5
6 Copeland Scroll Digital How It Works - Animation Modulation Mechanism (PWM Control) Scroll Separation 1.0 mm Loaded (1) Full Capacity Unloaded (0) Zero Capacity 6
7 Seamless Capacity Delivery Capacity % = (100 / Cycle Frequency)(Duty Time) Example: Cycle Time = 10 Seconds Capacity Loaded Time 10% 1.0 Second 11% 1.1 Second 12% 1.2 Second 25% 2.5 Second 50% 5.0 Seconds 90% 9.0 Seconds 3. Design Features 7
8 Copeland Scroll Features 1. Low Side Design Vs. High Side Design 2. Full Compliance (Axial And Radial) 3. Static Seals Vs. Dynamic Seals 4. Built-In Protective Devices The Low-Side Design Advantage Lower Internal Pressures & Lower Internal Temperatures Low Pressure High Pressure Discharge Suction Suction Discharge Low Side High Side 8
9 Low-Side Vs High Side Differences Conditions Copeland Low Side D Brand High Side Impact Hot Surface Top Cap Entire Shell Safety, Wiring Internal Pressure Low High Reliability Internal Temperature Low High Reliability Start Quick Cooling Slow Cooling Temperature Protection Oil Pump Out Rate Low High Oil Level Protection Liquid/Debris Handling Excellent Average Long-term Reliability Radial Compliance Debris Ensures Scroll Contact But, Allows Scrolls To Separate Sideways So Debris And Liquid Can Pass Without Damage Radial Compliance Scroll 6 9
10 Axial Compliance Floating Seal Upper Scroll (Fixed) Maintains Constant, Even Pressure On Scroll Tips Floating Seal Is Key Optimizes Tip Loading Lower Scroll (Orbiting) Pressure Balanced Eliminates Leakage Patented Design Advantages Of Full Compliance 1. High Efficiency 1. Scrolls Wear In Rather Than Wear Out 2. Less Performance Variability 2. Durability/Reliability Enhancement 1. Better Liquid Handling 2. Better Debris Handling 3. No Wear Out Unlike Tip Seal Design 3. Low Sound Level 1. Smooth Spectrum And Good Sound Quality 4. Unloaded Start 10
11 Static Seals Vs. Dynamic Seals Dynamic Seal Static Seal Static Seals Vs. Dynamic Seals Dynamic Seals Wear Are Sensitive to Liquid and Debris Are More Quickly Damaged By Excess Heat Static Seals Do Not Wear Are More Robust 11
12 4. Operating Envelope Digital Scroll Operating Envelope R-410A Digital Prototype Envelope Conden nsing Temperature ( F) Evaporating Temperature ( C) Evaporating Temperature ( F) Standard Operating Envelope Condensing Temperature e ( C) 12
13 5. Energy Efficiency Copeland Digital Scroll Power Savings 13
14 Partial Load Performance Digital Scroll Snap Shot of Actual Calorimeter Test Partial Load Performance Digital Scroll Snap Shot of Actual Calorimeter Test 14
15 Digital Scroll Data: Tested & Published IPLV Of 4.55 (Highest In Industry) HEFEI Inspection Report Released time: Type: Record Number: Energy Efficiency Grade: Released time: Product Categories: Record details: Manufacturer: VRF AC (heat pump) unit Samsung Electronics Normal Cooling Capacity: Cooling Power Consumption IPLV(C) Screenshot China Energy Labeling Website Part Load Testing Conditions 100% 75% 50% 25% 6. Precise Load Matching 15
16 Direct Expansion System & Copeland Scroll Digital Full Modulation (10~100%) Immediate Load Adjustment Step Less Modulation Close Temperature Control (+/- 1 K) Digital Modulating % Load and Temperature Swing With Fixe Capacity Compressors Load Digital Scroll : Capacity Output Range % Capacity Digital Scroll System 100% 50 Inverter System % % Modulation 16
17 7. Simplicity Inverter System Architecture Electronic & Mechanical Architecture Complexity 17
18 Drivers side-by by-side Simple Vs. Complex Electronic Architecture Digital Scroll System Architecture Simplified Electronic & Mechanical Architecture 18
19 8. Reliability Reliability - Easy Oil Return Easy Oil Return During Low Loads No Oil Pump Out During Unloading Loaded d Cycle Gas Velocity Sufficient i To Return Oil Don t Need Oil Separator Or Oil Return Cycle Less than 1% oil pumped out to field 19
20 Reliability Performance Total Digital Compressor In Field 500,000+ Reliability % 9. Electromagnetic Interference 20
21 Electromagnetic Interference Digital Scroll System EMC Regulation Inverter 5th E M W 7th 11th 13th 17th 19th Ratio 10. Online Support 21
22 22
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