Tianfeng TF-LS-50HP Circulating Chiller

Overview

The Tianfeng TF-LS-50HP Circulating Chiller is an industrial-grade, air-cooled refrigeration system engineered for precision temperature control in demanding laboratory and manufacturing environments. It operates on the vapor-compression refrigeration cycle, utilizing a hermetic scroll compressor and R22 refrigerant to deliver stable, continuous cooling across a wide operational range (0–50 °C). Designed for integration with high-heat-load instrumentation—including analytical spectrometers (ICP-OES, ICP-MS), X-ray diffractometers (XRD), scanning and transmission electron microscopes (SEM/TEM), graphite furnace atomic absorption spectrometers (GFAAS), and laser-based systems—the chiller maintains thermal equilibrium by circulating temperature-regulated coolant through external equipment jackets or heat exchangers. Its robust architecture supports uninterrupted 24/7 operation, meeting the thermal management requirements of GLP-compliant laboratories and ISO 17025-accredited testing facilities.

Key Features

• High-precision temperature regulation with ±0.1 °C stability over the full 0–50 °C range, enabled by PID-controlled digital thermostats (standard Chinese-made unit; optional RKC controller available)
• Integrated dual-pump configuration: primary refrigerant-side circulation (27 m³/h @ 20 m head) and user-side secondary loop (8 m³/h @ 25.5 m head), both featuring stainless-steel wetted parts
• 200 L insulated stainless-steel reservoir with level sensor and low-level alarm, supporting extended run times without manual refilling
• Comprehensive safety protection suite: high/low pressure cutouts, compressor discharge overheat protection, phase sequence and phase loss detection, motor overcurrent and overtemperature safeguards
• Low-noise condensing unit incorporating high-efficiency copper-tube/aluminum-fin heat exchanger and low-RPM external-rotor fan (50,000 m³/h airflow)
• Modular electrical cabinet housing CE-certified components from Siemens, Schneider Electric, and Omron—fully compliant with IEC 61000-6-2/6-4 EMC standards
• Front-panel digital display showing real-time coolant temperature, system status, and fault codes; remote monitoring via dry-contact alarm outputs

Sample Compatibility & Compliance

The TF-LS-50HP is compatible with any instrument requiring closed-loop liquid cooling at flow rates up to 60 m³/h and inlet/outlet temperature differentials up to 5 °C. It meets mechanical and electrical safety requirements per GB/T 19001–2016 (equivalent to ISO 9001:2015) and conforms to China’s CCC certification framework for industrial refrigeration equipment. While not intrinsically rated for hazardous locations, its construction adheres to IP54 enclosure protection for indoor laboratory deployment. The chiller supports audit-ready operation in regulated environments: configurable event logging (optional), password-protected parameter access, and timestamped alarm history align with basic FDA 21 CFR Part 11 data integrity expectations when paired with validated external data acquisition systems.

Software & Data Management

The standard control interface provides local setpoint adjustment, real-time temperature readout, and status indication via a backlit LCD. No embedded software or network connectivity is included in base configuration; however, analog 4–20 mA output signals (temperature, pump status) and relay-based alarm contacts enable integration into centralized building management systems (BMS) or SCADA platforms. Optional upgrades include RS485 Modbus RTU communication for PLC interfacing and external data logging. All firmware revisions undergo internal validation per Tianfeng’s documented design transfer protocol, with traceable revision logs maintained for quality audits.

Applications

• Materials Characterization: Thermal stabilization of XRD goniometers, SEM/TEM column chillers, and XRF detector Peltier assemblies to minimize thermal drift during long-duration scans
• Atomic Spectroscopy: Precise cooling of graphite furnace atomizers and plasma torch interfaces in GFAAS and ICP-MS systems to ensure reproducible atomization efficiency and signal stability
• Laser Systems: Heat extraction from CO₂, fiber, and diode-pumped solid-state (DPSS) lasers used in marking, cutting, and ablation applications—maintaining beam wavelength consistency and optical alignment
• Manufacturing Support: Mold temperature control in polymer processing, hydraulic oil cooling in CNC machining centers, and die-casting die quenching—all requiring consistent ΔT and flow delivery
• Pharmaceutical R&D: Temperature control of bioreactor jackets and chromatography column ovens during method development under cGMP-aligned lab practices

FAQ

What is the recommended maximum return water temperature for sustained compressor life?
For optimal reliability, return coolant temperature should not exceed 40 °C. Elevated return temperatures increase condensing pressure and reduce volumetric efficiency, accelerating wear on the scroll compressor.
Can this chiller operate continuously at its maximum 97.5 kW capacity?
Rated capacity assumes nominal conditions: 12 °C inlet / 7 °C outlet chilled water, 30 °C ambient air inlet / 40 °C air outlet. Sustained full-load operation requires adequate ventilation, clean condenser coils, and regular maintenance per the OEM service schedule.
Is the stainless-steel reservoir suitable for deionized (DI) water or glycol mixtures?
Yes—the 304 stainless-steel tank and pumps are chemically compatible with DI water, 20–30% ethylene glycol solutions, and common corrosion-inhibited coolants approved for laboratory use.
Does the unit support external temperature feedback for cascade control?
No native feedback loop is implemented; however, the analog 4–20 mA temperature output can be routed to an external PID controller for master–slave configurations where process temperature—not chiller outlet—is the controlled variable.