Junray ZR-D16 Portable Chiller

Overview

The Junray ZR-D16 Portable Chiller is a compact, field-deployable temperature control unit engineered to maintain precise coolant water temperatures between 5 °C and 35 °C. It is specifically designed as an integral thermal management component for the Junray ZR-3720 Dioxin Sampling System and ZR-3721 Heavy Metal Sampling System—both compliant with international stack emission monitoring protocols. Unlike general-purpose chillers, the ZR-D16 operates under demanding industrial field conditions, delivering stable cooling performance during extended-duration isokinetic sampling campaigns in high-temperature, high-humidity, or variable ambient environments. Its function is critical in preserving the integrity of thermally labile analytes—including polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), and volatile heavy metal species—by ensuring consistent condensation, filtration, and adsorption temperatures throughout the sampling train. The chiller integrates seamlessly with the ZR-3720’s heated sampling probe, impinger train, and filter holder assembly, enabling adherence to isokinetic flow control and thermal conditioning requirements specified in HJ/T 365–2007, HJ 77.2–2008, EPA Method 23, and UNI EN 1948.

Key Features

• Stable temperature control range: 5 °C to 35 °C, with ±0.5 °C setpoint accuracy and <±1.0 °C long-term drift over 8-hour operation
• Compact, ruggedized chassis with integrated carrying handles and shock-absorbing feet—total weight <18 kg for true portability
• High-efficiency hermetic compressor with R134a refrigerant; optimized heat exchange design for rapid thermal stabilization (<15 min from ambient to 10 °C)
• Intelligent PID-based temperature regulation with real-time feedback from dual Pt100 sensors (inlet and outlet)
• RS-485 communication interface for synchronized control and status reporting with ZR-3720/ZR-3721 main units
• Overheat, overpressure, and low-flow safety interlocks with audible/visual fault indication and automatic shutdown
• Corrosion-resistant stainless steel water reservoir (3.2 L capacity) with level sensor and anti-cavitation pump protection
• Low-noise operation (<58 dB(A) at 1 m), suitable for use in close proximity to sensitive sampling instrumentation

Sample Compatibility & Compliance

The ZR-D16 supports full compliance with regulatory sampling workflows requiring strict thermal conditioning of collection media. It enables conformance with:

• HJ/T 365–2007: Technical Specification for Dioxin Emission Monitoring from Hazardous Waste Incineration Facilities
• HJ 77.2–2008: Determination of Dioxin-like Compounds in Ambient Air and Exhaust Gas — Isotope Dilution High-Resolution Gas Chromatography / High-Resolution Mass Spectrometry (HRGC/HRMS)
• EPA Method 23: Determination of Polychlorinated Dibenzo-p-dioxins and Polychlorinated Dibenzofurans from Stationary Sources
• UNI EN 1948: Stationary Source Emissions — Determination of the Mass Concentration of PCDD/Fs

It ensures that the ZR-3720’s glass impingers (containing XAD-2 resin and polyurethane foam) and quartz fiber filters remain within validated thermal windows during sampling—preventing analyte loss via volatilization or degradation. For ZR-3721 applications, it maintains optimal condensation temperatures for mercury and semi-volatile metals (e.g., As, Se, Sb), supporting ISO 17025-accredited laboratories in producing defensible, auditable data for GLP/GMP-aligned environmental compliance reporting.

Software & Data Management

While the ZR-D16 itself operates as a dedicated hardware subsystem without embedded GUI, its RS-485 interface enables bidirectional telemetry with the host sampler’s control firmware (ZR-3720/ZR-3721). All chiller operational parameters—including setpoint, actual outlet temperature, compressor runtime, fault codes, and coolant level—are logged synchronously with sampler metadata (flow rate, stack velocity, date/time, barometric pressure) into the instrument’s internal non-volatile memory. Data export occurs via USB mass storage mode (FAT32), generating timestamped CSV files compatible with LIMS integration. Audit trails include system-level timestamps with battery-backed RTC (accuracy ±2 s/month), supporting FDA 21 CFR Part 11–compliant electronic records when deployed within validated laboratory information management systems.

Applications

• Source testing of municipal solid waste incinerators (MSWIs), hazardous waste incinerators (HWIs), and medical waste treatment facilities
• Environmental compliance verification for cement kilns co-processing hazardous waste
• Stack emission monitoring of dioxins, furans, and mercury under national emission standards (e.g., GB 18485–2014, GB 18484–2020)
• Research-grade sampling for toxic equivalency factor (TEF)-based risk assessment studies
• Field validation of continuous emission monitoring systems (CEMS) using manual reference methods
• Mobile laboratory deployments where space, power, and thermal stability are constrained

FAQ

What is the minimum ambient operating temperature for the ZR-D16?

The unit is rated for continuous operation at ambient temperatures from 5 °C to 40 °C. Below 5 °C, compressor oil viscosity increases significantly; external insulation of coolant lines is recommended.
Can the ZR-D16 be used with non-Junray sampling systems?

Yes—provided the external system accepts chilled water input (max. 3.2 L/min flow, 0.2–0.6 MPa pressure drop) and supports RS-485 Modbus RTU protocol for status polling.
Does the chiller require regular refrigerant servicing?

No. The sealed refrigeration circuit is maintenance-free for ≥5 years under normal field use; periodic visual inspection of condenser fins and coolant level is sufficient.
How is calibration traceability ensured?

Each unit ships with a factory calibration certificate referencing NIST-traceable Pt100 sensors; users may perform field verification using certified dry-well calibrators per ISO/IEC 17025 procedures.
Is the ZR-D16 compatible with explosion-proof environments?

Not intrinsically safe by default. For Zone 1/2 applications, optional ATEX-compliant enclosure kits (certified to II 2G Ex db IIB T4 Gb) are available upon request.