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30RT Low-Temperature Air-Cooled Screw Chiller | -10°C Outlet Glycol Water
An air‑cooled glycol chiller is an industrial cooling system that uses an ethylene‑glycol and water mixture as circulating coolant instead of pure water. Unlike water‑only chillers, the glycol additive lowers the freezing point of the fluid, enabling stable sub‑zero or near‑freezing process cooling and preventing pipe and equipment freeze‑up during operation. Heat generated from the production process is absorbed by the glycol solution and rejected to the surrounding atmosphere directly through air‑cooled condenser fans, eliminating the need for cooling towers.
The 30RT Low-Temperature Air-Cooled Screw Chiller delivers a stable -10℃ chilled water outlet, purpose-built for low-temperature applications such as cold storage, food processing, chemical and ice rink projects. Powered by a high-efficiency screw compressor with 4-step capacity control (25%–100%), it automatically matches cooling output to actual load for significant energy savings under partial-load operation. The unit is fully controlled by a Siemens PLC with touchscreen HMI, offering automatic start/stop, real-time monitoring and fault alarm protection for unattended, worry-free operation. Equipped with a high-efficiency oil separator, gas-liquid separator and economizer, the system ensures reliable lubrication, protects the compressor against slugging, and enhances COP for greater efficiency under low-temperature conditions. Its fully air-cooled, package design eliminates the need for a cooling tower, enabling quick installation and flexible placement in space-constrained or water-scarce sites — a dependable, energy-efficient cooling solution for your low-temperature industrial needs.
Engineered for both indoor and outdoor installation, the unit features reinforced condenser coils optimized for high‑ambient temperature conditions, making it well‑suited for hot‑climate markets including the Middle East, Africa and tropical regions. It works reliably with glycol‑water mixture to prevent freezing, supporting a wide range of process cooling requirements from plastic injection, food & beverage, pharmaceutical, chemical processing to special‑purpose project cooling.
Main Features - Glycol Air-Cooled Chiller
1. Stable Low-Temperature Glycol Output Delivers a stable -10℃ glycol outlet (lower temperatures available on request), designed for ice rinks, food & beverage processing, cold storage, chemical and pharmaceutical applications where water would freeze.2. High-Efficiency Screw Compressor with 4-Step Capacity Control A reliable screw compressor automatically modulates between 25% / 50% / 75% / 100% to match the actual load — cutting energy use under partial-load conditions and reducing compressor wear from frequent on/off cycling.
3. Siemens PLC Intelligent Control Fully automatic operation via Siemens PLC + touchscreen HMI, with real-time monitoring of glycol temperature, pressure and current, automatic start/stop, fault self-diagnosis with alarm, and remote monitoring capability for unattended, worry-free running.
4. Oil Separator + Gas-Liquid Separator + Economizer
High-efficiency oil separator ensures proper lubrication and oil return for long compressor life;
Gas-liquid separator prevents liquid slugging and protects the compressor;
Economizer boosts cooling capacity and improves COP, especially valuable under low-temperature duty.
5. Air-Cooled, Tower-Free Design Fully packaged air-cooled unit — no cooling tower or condenser water piping required, saving water and simplifying installation. Compact footprint, quick to install and ideal for space-constrained or water-scarce sites.
6. Antifreeze Protection & Corrosion Resistance Glycol circuit designed with proper antifreeze concentration and corrosion-inhibited materials to protect the evaporator and piping, ensuring reliable operation below 0℃.
7. Reliability & Easy Maintenance Key components from reputable brands, complete protection devices (high/low pressure, overload, phase loss, anti-freeze), and accessible service points for low maintenance and easy upkeep.
Product Highlights of the 30RT Glycol Chiller
1. -10℃ Low-Temperature Outlet, Consistent Cooling Capacity
Purpose-built for low-temperature duty, delivering a stable -10℃ chilled water outlet to meet freezing, cold storage, chemical, ice rink and food processing applications.
2. Screw Compressor with 4-Step Capacity Control -- Output on Demand
High-efficiency screw compressor with 4-step capacity regulation, automatically switching between 25% / 50% / 75% / 100% load. Partial-load operation saves significant energy and avoids frequent on/off cycling that shortens compressor life.
3. Siemens PLC Intelligent Control -- Unattended Operation
Equipped with Siemens PLC and touchscreen HMI, providing real-time monitoring of water temperature, pressure, current and more, plus auto start/stop, fault alarms, operation history and remote monitoring capability for stable, worry-free operation.
4. Oil Separator + Gas-Liquid Separator + Economizer -- A More Efficient System
- High-efficiency oil separator: thorough oil return, reliable compressor lubrication, extended service life;
- Gas-liquid separator: prevents liquid slugging and protects the compressor;
- Economizer circuit: increases cooling capacity and improves COP — greater efficiency under low-temperature conditions.
5. Air-Cooled Design -- No Cooling Tower, Flexible Installation
Fully packaged air-cooled structure, eliminating the need for a cooling tower and chilled-water piping to the condenser. Fast, easy installation, ideal for space-constrained or water-scarce sites.
OUMAL air‑cooled glycol chiller is equipped with Hanbell semi‑hermetic screw compressor, featuring 4‑step capacity control: 0‑25%‑50%‑75%‑100%. It automatically adjusts cooling capacity according to real‑time process load for better energy‑saving under part‑load conditions, suitable for long‑term continuous operation under low‑temperature glycol working conditions.
Adopting Siemens PLC control system with touch‑screen HMI, the unit provides real‑time monitoring of all operating parameters, auto‑fault diagnosis and full‑range safety protections. Multi‑language support and remote communication interface are available for easy supervision. The chiller supplies stable glycol solution from 0℃ down to ‑35℃, ideal for concrete cooling, ice rink, chemical reactor, food processing and other heavy‑duty industrial cooling projects.
Screw compressor Glycol water chiller Product Information
●：Temperature control -35℃ to 0℃
●：Shell and tube evaporator and condenser
●：Bizer or Hanbell semi-hermetic screw compressor
●：Optional refrigerant R134a,R407c and R404a
●：Schneider Electrical Components
●：PLC/ Touch Screen Control Panel
●：No water tank, connect an external water tank
●：Need to connect a cooling tower
●：Safety protection devices of whole screw chiller
●：All models and cooling capacity available
Screw type water chiller Product display
Compressor features:
•New screw type compressor with 20%-30% higher in efficiency.
•Cooling capacity control available at four steps (100%-75%-50%-25%), three steps (100%-66%-33%) or no steps control system.
•High efficiency, low noise and vibration, easy to install.
•Environmental protection refrigerant R134a, R407c available.
Control operation system:
•SIEMENS PLC program control system, human-computer interface with big LED touch panel, running state displaying in multi-language, and self-diagnosis for easy operation and supervision.
•Extended industrial interface, convenient for being computer monitor via network.
Completely safety protection function:
•Multi-safety protection by high and low pressure, compressor overheating, overloading, over temperature, flow switch, phase sequence, phase-missing, exhaust overheating and anti-freezing.
More Pictures of the 60Ton Industrial Glycol Chiller
Typical Applications of Glycol Chiller
Ethylene glycol chillers are primarily used in industrial settings requiring low-temperature cooling. They utilize an ethylene glycol-water solution as the heat transfer fluid, which remains liquid at temperatures below 0°C, thereby preventing freezing and equipment damage. Standard outlet temperatures range from -5°C to -25°C, with low-temperature models capable of reaching -45°C.
It used in Industrial process cooling, beverage production, food processing, pharmaceutical manufacturing, chemical cooling, injection & extrusion molding, large‑volume tank cooling and custom project‑based cooling systems.
Pharmaceutical and Chemical Industries: Meeting low-temperature requirements for production processes such as reactor cooling and material cooling; this is one of the most widespread application areas for ethylene glycol chillers.
New Energy Industry: Used for temperature control in chip manufacturing and new energy battery packs. Battery cooling involves two methods: direct cooling (where the cooling medium flows over the cell surface) and indirect cooling (where the medium flows through pipes and exchanges heat with the cells via a radiator). The goal is to maintain the battery at an optimal operating temperature, minimize temperature differences between cells, and delay aging.
Food and Beverage Processing: Used for process cooling, filling, and cold storage of products such as milk, beer, ice cream, and jelly; also commonly used for the pre-cooling of harvested fruits like frozen berries. Such projects typically require a return water temperature between -8°C and 0°C, with cooling loads exceeding 200 kW.
Data Centers and HVAC Systems: Utilizing ethylene glycol solution to exchange heat with cold outdoor air via dry coolers to enable "free cooling" modes. When the outdoor temperature is sufficiently low, this method can fully or partially replace mechanical refrigeration, significantly reducing data center energy consumption and improving PUE (Power Usage Effectiveness) metrics.
Product Specification
| Item Model | OMC-70ASL | ||
| Cooling Capacity | kcal/h | 181460 | |
| KW | 211 | ||
| Ton | 60 | ||
| Input Power | KW | 75.3 | |
| Max. running current | A | 171 | |
| Power | 3ph-380V-50Hz | ||
| Refrigerant | Type | R407C / R404A/ R513A /R134A | |
| Charge quantity | kg | 53 | |
| Control Mode | Expansion Valve | ||
| Compressor | Type | Semi-Hermetic Screw | |
| Power | KW | 69.9 | |
| Start-up Mode | Y-△ | ||
| Capacity control | ％ | 0-25-50-75-100 (0-33-66-100) | |
| Evaporator | Type | Dry type Shell and Tube | |
| Chilled water flow | m3/h | 36.3 | |
| Pipe Diameter | lnch | 3＂ | |
| Condenser | Type | Air cooled high-efficient inner threaded copper-tubing aluminum fin type | |
| Fan | Type | Low noise outer rotor | |
| Power | KW | 5.4 | |
| cooling air flow | m3/h | 70000 | |
| safety protection |
compressor over heat protection, over load protection, high and low pressure protection, reversed and lacking phase protection, anti-freezing protection, flow switch |
||
| Dimension | Length | mm | 3200 |
| Width | mm | 1850 | |
| Height | mm | 2200 | |
| Net Weight | kg | 2260 | |
| Running Weight | kg | 2420 | |
Packing & Shipping
Packing for LCL transportation Bulk carge
Packing & Loading Full container transportation
FAQ
Q1: What is the minimum outlet water temperature this chiller can reach?
A1: The unit is designed for a stable -10℃ outlet as standard. Lower outlet temperatures can be configured upon request — please confirm the exact required temperature and flow rate with us, and we will tailor the compressor, refrigerant and system design accordingly.
Q2: How does the 4-step capacity control help save energy?
A2: The screw compressor automatically modulates between 25% / 50% / 75% / 100% output to match the actual cooling load. During partial-load operation — common in most real working conditions — the unit consumes significantly less power instead of cycling on/off, which lowers electricity bills and reduces wear on the compressor.
Q3: Does this air-cooled chiller need a cooling tower?
A3: No. It is a fully air-cooled, packaged unit — no cooling tower, condenser water piping or water source is required. This makes installation quicker and greatly simplifies site requirements, ideal for space-constrained or water-scarce locations.
Q4: What does the Siemens PLC control system do?
A4: The Siemens PLC with touchscreen HMI provides fully automatic operation — real-time monitoring of water temperature, pressure and current, automatic start/stop, fault self-diagnosis with alarm, and operating history. It also supports remote monitoring for unattended, reliable operation.
Q5: Why are the oil separator, gas-liquid separator and economizer important?
A5: They protect the compressor and boost efficiency: the high-efficiency oil separator ensures proper lubrication and oil return; the gas-liquid separator prevents liquid slugging that could damage the compressor; and the economizer increases cooling capacity and improves COP, particularly valuable under low-temperature duty.
Q6: What refrigerant and power supply are used?
A6: Refrigerant and power supply are selected to match your target market and operating conditions (commonly R404A / R507A, and 380V/3PH/50Hz or 460V/3PH/60Hz). Please advise your local requirements, and we will confirm the optimal configuration.
Q7: What is the delivery time and warranty?
A: Standard delivery time depends on your configuration and destination. We provide a 15-month warranty (from commissioning date) and full after-sales support, including technical guidance for installation and commissioning, spare parts supply and responsive remote troubleshooting.
