The Distribution Nozzle Array is a critical component of the Cryogenic Injection System, responsible for the controlled and uniform dispersion of cryogenic fluids (such as liquid nitrogen or liquid CO2) onto a surface or into a process stream. It consists of multiple nozzles arranged in a specific pattern to ensure optimal coverage, temperature distribution, and process efficiency in applications requiring rapid cooling, freezing, or temperature control. The array is typically fabricated from stainless steel (e.g., 316L) or high-performance plastics (e.g., PEEK, PTFE) to withstand cryogenic temperatures and resist corrosion. Key parameters include the number of nozzles (12–48), nozzle pitch (20–50 mm), operating pressure (1.0–1.6 MPa), flow rate per nozzle (0.5–2.0 L/min), spray angle (60–120°), temperature range (-196 to 80°C), material (SS316L per ASTM A240), seal material (PTFE per ASTM D4894), weight (5–15 kg), connection size (DN25–DN50 per ISO 7005), and leakage rate (≤0.1 sccm per ISO 15848). These values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The array's design ensures uniform distribution, which is essential for consistent cooling or freezing. Proper selection requires consideration of the target area, required cooling rate, fluid properties, and process conditions. Verification of performance should include leak testing and spray pattern analysis. Maintenance signals include reduced flow uniformity, increased leakage, or visible damage to nozzles. Failure boundaries include operation outside the specified pressure or temperature limits, which may lead to seal failure or structural damage.
Cryogenic fluid under pressure is supplied to the manifold of the array. The fluid is then metered and directed through individual nozzles. The nozzle design (orifice shape, size) and the spatial arrangement of the array determine the spray pattern, droplet size, and distribution profile, ensuring the cryogenic fluid is applied evenly and effectively to the target. The operating pressure range of 1.0– The flow rate per nozzle and spray angle are selected based on the desired coverage and cooling intensity. The array's geometry and nozzle configuration are optimized to achieve uniform distribution across the target area, which is critical for process efficiency and product quality.
