Water Chiller
1. Product Overview
1.1 General Description
A water chiller is a centralised refrigeration unit that supplies constant-temperature chilled water at 5-30℃. Working on a vapour-compression refrigeration cycle, it removes heat from the water and provides cooling water for process equipment. Each unit consists of a compressor, condenser, evaporator, expansion valve and control system. By compressor type, the range is divided into scroll (2-50kW), reciprocating (30-200kW) and screw (100-2000kW) models. As the core process-cooling equipment in the chemical, pharmaceutical, food and electronics industries, the water chiller features large cooling capacity, precise temperature control and stable operation.
1.2 Key Features
- Full series covering a cooling capacity range of 2-2000kW
- Outlet water temperature adjustable from 5-30℃ with ±0.5℃ control accuracy
- Air-cooled / water-cooled condenser options
- Scroll / reciprocating / screw compressor options
- Multi-compressor design with staged start-stop for energy savings
- High-efficiency stainless steel plate heat exchanger
- RS485 communication for remote monitoring
- Comprehensive protection functions for safe, reliable operation
1.3 Document Scope
This specification covers the design principles, performance parameters, system classification, key component selection, application fields, design standards and certifications, custom optional configurations, warranty terms, packaging and delivery of the water chiller, together with the information required for an inquiry. It serves as a comprehensive reference for procurement, model selection and technical communication.
2. Working Principle
2.1 Chiller Process Flow
Chiller working cycle: the compressor draws in low-temperature, low-pressure refrigerant → compresses it into high-temperature, high-pressure gas → the gas enters the condenser, rejects heat and condenses into liquid → is throttled by the expansion valve → evaporates in the evaporator, absorbing heat and chilling the circulating water → the refrigerant gas returns to the compressor. The circulating water absorbs heat from the user side, returns to the evaporator to be chilled, and is pumped back to the user side. Cooling capacity is regulated through the compressor and the expansion valve, while PID control keeps the outlet water temperature precisely constant.
3. System Classification
| | | | |
|---|
| Small | LS-5, LS-10, LS-20 | Cooling capacity 5-20kW | Cooling of small equipment | Scroll compressor |
| Medium | LS-50, LS-100 | Cooling capacity 50-100kW | Production line cooling | Reciprocating / screw |
| Large | LS-200, LS-500, LS-1000 | Cooling capacity 200-1000kW | Central cooling supply | Multi-circuit screw compressors |
4. Technical Parameters
4.1 Main Technical Parameters of the Water Chiller
| LS-5 | LS-10 | LS-20 | LS-50 | LS-100 | LS-200 | LS-500 |
|---|
| Cooling capacity (kW) | 5 | 10 | 20 | 50 | 100 | 200 | 500 |
| Outlet temp. (℃) | 5-30 | 5-30 | 5-30 | 5-30 | 5-30 | 5-30 | 5-30 |
| Temp. control accuracy | ±0.5 | ±0.5 | ±0.5 | ±0.5 | ±0.5 | ±0.5 | ±1 |
| Compressor type | Scroll | Scroll | Scroll | Screw | Screw | Screw | Screw×2 |
| Condensing method | Air-cooled | Air-cooled | Air-cooled | Air/Water | Water-cooled | Water-cooled | Water-cooled |
| Pump power (kW) | 0.37 | 0.55 | 0.75 | 1.5 | 2.2 | 4 | 7.5 |
| Refrigerant | R22/R410A | R410A | R410A | R134a | R134a | R134a | R134a |
4.2 Dimensions and Weight
| | | | | |
|---|
| LS-5 | 800 | 500 | 900 | 100 | 0.4 |
| LS-10 | 1000 | 600 | 1000 | 180 | 0.6 |
| LS-20 | 1200 | 700 | 1200 | 300 | 0.8 |
| LS-50 | 1500 | 900 | 1500 | 600 | 1.4 |
| LS-100 | 1800 | 1100 | 1700 | 1200 | 2.0 |
| LS-200 | 2200 | 1400 | 1900 | 2500 | 3.1 |
| LS-500 | 3000 | 2000 | 2200 | 6000 | 6.0 |
5. Applications
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|---|
| Chemical | Reactor cooling / crystallisation cooling | Stable temperature | Reactor cooling |
| Pharmaceutical | Fermenter cooling / extraction cooling | GMP compliance | Fermentation cooling |
| Food | Sterilisation cooling / fermentation cooling | Food grade | Post-sterilisation cooling |
| Electronics | Laser cooling / chip testing | Precise temperature control | Laser cooling |
| Plastics | Injection mould cooling | Stable water temperature | Mould cooling |
| HVAC | Central air-conditioning cold source | Large cooling capacity | Mall / factory air conditioning |
6. Core Component Selection
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|---|
| Compressor | Compresses the refrigerant | Scroll / reciprocating / screw | Brand determines reliability |
| Condenser | Rejects heat on condensation | Copper-tube aluminium-fin / shell-and-tube | Finned type for air-cooling, shell-and-tube for water-cooling |
| Evaporator | Evaporates, absorbs heat and chills the water | Stainless steel plate / shell-and-tube | Plate type is efficient, shell type durable |
| Expansion valve | Throttles and reduces pressure | Thermostatic / electronic | Electronic valves give more accurate control |
| Water pump | Circulates the cooling water | Stainless steel centrifugal pump | Head and flow matched to demand |
| Control system | Coordinates operation | PLC + touch screen | PID temperature control + remote monitoring |
| Filter drier | Removes impurities | Copper / stainless steel body | Replace the core periodically |
| Electric cabinet | Electrical control | Schneider / ABB components | Includes all protection functions |
7. Design Standards and Certifications
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|---|
| Relevant GB/T standards | Design and manufacture | Fully compliant | Type test report |
| GMP (cGMP) | Design, manufacture, documentation | Fully compliant | GMP compliance certificate |
| ISO 9001:2015 | Quality management system | Certified | ISO 9001 certificate |
| CE certification | Machinery safety / EMC | Optional | CE declaration of conformity |
| FDA | Food / pharmaceutical grade | Optional | FDA compliance documents |
8. Custom Optional Configurations
| | | | |
|---|
| 1 | Condensing method | Air / water-cooled | Air-cooled | Water-cooled requires a cooling tower |
| 2 | Compressor brand | Copeland / Bitzer / Hanbell | Copeland | Imported +2-3 weeks |
| 3 | Refrigerant | R22/R410A/R134a | R410A | R134a +1 week |
| 4 | Water pump | Built-in / external | Built-in | External +1 week |
| 5 | Communication | RS485/MODBUS/none | RS485 | MODBUS +1 week |
| 6 | Explosion-proof | Standard / ExdIIBT4 | Standard | Explosion-proof +2-3 weeks |
9. Material Property Requirements
| | |
|---|
| Operating temperature | -40~250℃ | Depends on seals and materials |
| Corrosivity | Mild to moderate corrosion | Strong corrosion requires 316L or a lining |
| Explosion-proof requirement | Selected according to the site | Zone 1 / Zone 2 differ in grade |
10. Warranty Terms
| | | |
|---|
| Main equipment warranty | 12 months | All components included | 12 months from successful commissioning |
| Extended warranty (optional) | 24 months | Same as standard warranty | Must be purchased with the order |
| Wear-parts warranty | 6 months | Seals, bearings, etc. | Normal wear excluded |
11. Packaging and Delivery
| |
|---|
| Standard lead time | 6-10 weeks after order confirmation |
| Custom configuration lead time | 10-16 weeks |
| Incoterms | FOB Shanghai / CIF / DAP |
| Packaging | Export wooden case |
| Shipping | Container or break-bulk vessel |
12. Information Required for Inquiry
| | |
|---|
| 1 | Required cooling capacity | kW or refrigeration tons RT |
| 2 | Outlet water temperature | ℃ |
| 3 | Circulating water flow | m³/h |
| 4 | Condensing method | Air / water-cooled |
| 5 | Equipment to be cooled | Reactor / fermenter / other |
| 6 | Power supply specification | V/Hz/phases |
| 7 | Explosion-proof requirement | Standard / explosion-proof |
| 8 | Installation environment | Indoor / outdoor |
