Tianfeng LS-18000W Water-Cooled Circulating Chiller

Overview

The Tianfeng LS-18000W Water-Cooled Circulating Chiller is an engineered thermal management solution designed for precision temperature stabilization of high-heat-load laboratory and industrial instrumentation. Based on the principles of vapor-compression refrigeration with water-cooled condensation, it delivers stable chilled water at tightly regulated setpoints between 0 °C and 10 °C — critical for maintaining operational integrity in sensitive analytical platforms. Unlike air-cooled chillers, its water-cooled architecture enables higher thermodynamic efficiency, lower ambient heat rejection, and consistent performance under continuous-duty conditions — essential for unattended, multi-shift, or 24/7 operation in controlled environments. The unit integrates a scroll compressor, stainless-steel reservoir, digital PID controller, and full-spectrum safety interlocks to ensure long-term reliability, repeatability, and compliance-ready operation.

Key Features

• Stable temperature control with ±0.1 °C fluctuation across the 0–10 °C operating range, validated under steady-state load conditions
• 12 kW nominal refrigeration capacity at standard conditions (chilled water inlet 12 °C / outlet 7 °C; cooling water inlet 30 °C / outlet 40 °C)
• Integrated stainless-steel reservoir (85 L) with corrosion-resistant internal finish and level monitoring
• High-efficiency scroll compressor paired with imported expansion valves and solenoid valves from European and Japanese suppliers
• Digital PID temperature controller with real-time display, adjustable setpoint, and programmable ramp/soak profiles (RKC optional)
• Continuous-duty circulating pump delivering up to 2.0 bar pressure and 2 L/min flow rate, compatible with closed-loop instrument cooling circuits
• Comprehensive safety system including compressor overheat protection, high/low refrigerant pressure cutoffs, overcurrent detection, and overtemperature alarm with dry-contact fault output
• Full electrical integration using UL-recognized components from Siemens, Schneider, and Omron for industrial-grade reliability
• Compact integrated footprint (1350 × 800 × 1500 mm) with castor-mounted base for lab-floor mobility and flexible placement

Sample Compatibility & Compliance

The LS-18000W is engineered for seamless integration with instruments requiring precise, low-temperature coolant delivery — including graphite furnace atomic absorption spectrometers (GFAAS), inductively coupled plasma optical emission spectrometers (ICP-OES), ICP-mass spectrometers (ICP-MS), X-ray fluorescence (XRF) and X-ray diffraction (XRD) systems, scanning electron microscopes (SEM), and transmission electron microscopes (TEM). Its water-cooled design minimizes ambient thermal load in enclosed lab spaces and avoids localized hot-air discharge typical of air-cooled units. The chiller meets ISO 9001:2000 quality management system requirements and incorporates electrical safety features aligned with IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emission) standards. While not certified to FDA 21 CFR Part 11 out-of-the-box, its digital controller supports audit-trail-capable data logging when interfaced with compliant third-party SCADA or LIMS platforms — facilitating GLP and GMP-aligned validation protocols.

Software & Data Management

The unit operates via a standalone digital PID controller with local interface only — no embedded OS, network stack, or cloud connectivity. Temperature setpoint, real-time water temperature, and status indicators (e.g., pump active, compressor running, fault condition) are displayed on a backlit LCD screen. For traceable operation in regulated labs, analog 4–20 mA or 0–10 V output signals (optional) enable connection to building management systems (BMS) or centralized data acquisition hardware. Fault outputs are provided as dry-contact relay closures for integration into facility-wide alarm networks. While native software is not included, the controller’s RS-485 port (Modbus RTU protocol, optional) permits integration with LabVIEW, MATLAB, or custom Python-based monitoring tools — supporting automated calibration logs, runtime statistics, and preventive maintenance scheduling per ISO/IEC 17025 Clause 6.4.3.

Applications

• Laboratory instrumentation cooling: Stabilization of detector housings, RF generators, vacuum pumps, and plasma sources in ICP, XRF, and electron microscopy systems
• Thermal management of high-power laser sources (e.g., excimer, fiber, CO₂) used in ablation, LIBS, and Raman spectroscopy setups
• Temperature control for high-precision metrology equipment, including coordinate measuring machines (CMM) and interferometric alignment systems
• Supporting cryo-preparation workflows in life sciences — e.g., chilled sample stages for AFM or cryo-TEM grid preparation
• Process cooling in pharmaceutical QC labs for dissolution testers, HPLC column ovens, and automated sample handlers requiring sub-ambient thermal stability
• Industrial R&D applications including mold temperature control in polymer characterization, lubricant viscosity testing, and thermal cycling of electronic assemblies

FAQ

What is the recommended maximum return water temperature for this chiller?
For optimal compressor longevity and system efficiency, the cooling water return temperature should not exceed 40 °C. Higher return temperatures increase condensing pressure and reduce refrigeration capacity and COP.
Can this chiller operate continuously for 24/7 laboratory use?
Yes — the LS-18000W is rated for continuous duty with redundant safety protections and a scroll compressor engineered for >30,000 hours MTBF under nominal load conditions.
Is the stainless-steel reservoir suitable for deionized or inhibited coolant solutions?
The 304 stainless-steel tank and wetted components are compatible with ASTM D1384-compliant inhibited glycol-water mixtures and high-purity deionized water (resistivity ≥1 MΩ·cm), provided pH remains within 6.5–8.5.
Does the unit support external temperature feedback control from the instrument being cooled?
Not natively — control is based on internal reservoir sensor feedback. However, the optional 4–20 mA output can be used in cascade mode with external controllers that accept remote setpoint input.
What certifications does the chiller hold for international shipment?
The unit complies with CE marking requirements for EMC (2014/30/EU) and Low Voltage Directive (2014/35/EU); factory test reports include insulation resistance, dielectric strength, and leakage current verification per EN 61000-6-2/6-4.