Jul 15,2026
High-Pressure Atomization Cooling System: Evaporative Cooling Outdoor Environment Regulation Technical Guide
I. System Overview
The High-Pressure Micro-Mist Evaporative Cooling System is an evaporative cooling technology specifically designed for outdoor open spaces.
It uses a high-pressure pump to atomize water into ultra-fine mist droplets (Dv50 ≤ 4μm), absorbing heat through the latent heat of water evaporation to achieve local temperature reduction of 3–8°C while creating attractive landscape effects.
It is suitable for semi-open spaces such as commercial plazas, stadiums, and theme parks. It serves as an ideal alternative to traditional air conditioning, which suffers from high energy consumption and limited coverage.
The system integrates multi-parameter sensors and can dynamically adjust misting strategies based on dry-bulb/wet-bulb temperature, wind speed, and solar intensity, achieving sensible heat reduction of 3–8°C. The complete technical solution is provided by Taining Kechuang. It has been successfully applied in multiple domestic stadiums, commercial plazas, and parks, and has served the thermal comfort needs of the Chinese Super League and international events.
Typical Application Scenarios:
Commercial plazas and pedestrian streets
Urban parks and green spaces
Stadiums and spectator stands
Tourist attractions and theme parks
High-end hotels and resorts
High-temperature, dry, or tropical regions
II. Evaporative Cooling Principle
Ultra-fine mist droplets are sprayed into the air, absorbing latent heat of vaporization (≈2260 kJ/kg) through evaporation and lowering the dry-bulb air temperature. The theoretical cooling limit is the wet-bulb temperature of the air.
Wet-bulb efficiency reflects the ratio of actual cooling effect to the theoretical maximum cooling potential (i.e., the dry-bulb/wet-bulb temperature difference). Higher efficiency means the misting system is closer to the ideal evaporative cooling state.
Key factors affecting evaporative cooling performance include: ambient dry-bulb temperature, relative humidity, droplet size, spray velocity, and air velocity.
Parameter
Influence Relationship
Typical Range
Dry-bulb Temperature (°C)
Higher = greater cooling potential
30–45
Relative Humidity (%)
Lower = more significant cooling effect
20–80
Droplet Size (μm)
Smaller = faster evaporation rate
≤4
Spray Velocity (m/s)
Affects air mixing
15–25
Air Velocity (m/s)
Affects residence time
0.5–3
Typical Conditions: Dry-bulb 35°C, 45% RH, ≤4μm droplets → local cooling of 5–8°C within 3 minutes.
2.1 Comparison of Outdoor Cooling Methods
Comparison Dimension
High-Pressure Misting System
Compressor Air Conditioning
Evaporative Air Cooler
Energy Efficiency Ratio (EER)
≥20
2.5–3.5
8–12
Cooling Capacity per Unit Area (W/m²)
150–250
200–300
80–120
Application Range
Open spaces
Enclosed spaces
Local
Initial Investment (USD/m²)
10–15
35–60
4–6
III. System Composition and Technical Parameters
Equipment
Technical Indicators
Highlighted Parameters
Precision Filter
≤5μm (standard), RO optional
1nm ✓
High-Pressure Plunger Pump
7.0–8.5 MPa, flow 8–24 L/min
✓
316L Stainless Steel Pipe
Working pressure ≥20 MPa, wall thickness 1.0–1.5 mm
✓
High-Pressure Atomizing Nozzle
Dv50 ≤4μm, single nozzle flow 80–120 cc/min
✓
Intelligent Controller
Temp/Humidity, wind speed, solar, rain sensor; supports Modbus/BACnet
✓
Nozzles use ruby cores for superior wear resistance compared to ceramic. Taining Kechuang provides complete integrated solutions.
Equipment Dimensions Reference: Typical host unit size is 650–750 mm (L) × 450–550 mm (W) × 500–1250 mm (H), depending on flow rate and power configuration.
IV. Design and Calculation
4.1 Cooling Load Estimation
Area Type
Recommended Cooling Load (W/m²)
Main Entrance Plaza
220–250
Outdoor Dining Area
200–230
Commercial Inner Street
150–180
4.2 Nozzle Layout Principles
Height: 3.0–3.5 m
Spacing: 3–5 m with overlap
Spray Angle: 45° toward prevailing wind direction
Zoning Control: Independent valve groups every 500–800 m²
V. Intelligent Control Strategies
The system uses PID + fuzzy logic control to dynamically adjust misting duty cycle and zoning modes.
Control Modes: Comfort, Strong Cooling, Anti-Humidity, Landscape, Energy Saving, Rainy Day.
Thermal Comfort Indicators: PMV ±0.5, PPD ≤10%.
VI. Construction and Maintenance
6.1 Water Treatment Process
Municipal water → Pre-filter (100μm) → Precision filter (5μm) → Activated carbon/RO (optional) → Water storage → High-pressure pump
6.2 Piping Design
Flow velocity: 2–3 m/s
Pressure loss: 0.2–0.3 MPa/100 m
Configuration: Loop supply/return, slope ≥0.5%
6.3 Drip Prevention and Legionella Control
Mechanical anti-drip valve core – automatically cuts water when stopped
Circulating pipe network avoids dead zones; dry pipe purging possible when stopped
UV-C sterilization optional
6.4 Operation & Maintenance Schedule
Maintenance Item
Frequency
Filter cleaning
Weekly
Nozzle inspection
Monthly
Pipe network sealing check
Quarterly
Sensor & pump calibration
Annually
Winter freeze protection drain
When temp < 5°C
VII. Safety, Health, and Legionella Prevention System
7.1 Legionella Prevention System
The high-pressure atomization system adopts a multi-barrier design to ensure public health and safety:
Water Quality Standard: Meets current national standards Hygienic Standard for Drinking Pure Water GB17324 and High-Pressure Cold Mist Engineering Technical Specification (CECS447). Backflow prevention valves are installed at water sources.
Water Management: Timed circulation and drainage of water in pipes to avoid dead zones; optional UV-C module to inactivate microorganisms.
Anti-Drip Design: Nozzles have built-in anti-drip plugs and PP filter cores. No dripping occurs after shutdown, preventing slippery floors and water accumulation.
Regular Purging: Automatic dry-pipe purging when stopped to keep lines dry and inhibit biofilm formation.
7.2 Hygiene Certification and Testing
Third-party water quality test reports can be provided to ensure mist water meets Hygienic Standard for Drinking Water (GB5749). In high-traffic areas (stadiums, transport hubs), quarterly microbial sampling at outlets is recommended.
VIII. Typical Application Cases
Project
Area (m²)
Environmental Conditions
Cooling Effect (°C)
Year
Beijing Workers' Stadium
15,000
35°C / 45% RH
31°C in 3 min (≈4°C drop)
2023
Large Domestic Stadium
12,000
32°C / 60% RH
Local 4–6°C
2024
Urban Commercial Plaza
8,000
38°C / 35% RH
5–7°C
2024
Theme Park Visitor Area
5,000
34°C / 70% RH
3–5°C
2025
Note: The Beijing Workers' Stadium project used an intelligent cold mist cooling system to meet thermal comfort requirements for athletes and spectators during the Chinese Super League and international events. The system has been widely promoted in multiple stadiums, commercial plazas, and parks, with customized designs based on local climate conditions.
IX. International Competitor Comparison
Main Suppliers
Supplier
Main Business
Technical Features
Idrobase Group (Italy)
High-pressure misting, humidification, cooling
Industrial/commercial, European market
Fogco (USA)
High-pressure mist systems, outdoor cooling, landscape mist
North American restaurants & theme parks
Mee Industries (USA)
Industrial humidification, climate simulation
High-precision environmental control
Wavin (Netherlands)
Plastic piping, underfloor heating/cooling
Indoor circulation cooling & auxiliary
Geberit (Switzerland)
Sanitary, drainage, rainwater systems
Comprehensive building system integration
Taining Kechuang (China)
High-pressure micro-mist evaporative cooling, rainwater management
Large outdoor open spaces & landscapes
Technical & Application Comparison
Dimension
Overall Observation
Core Technology
High-pressure micro-mist evaporative cooling, droplet size 3–5μm, cooling via water evaporation
Intelligent Control
Temperature/humidity logic, multi-vendor integration of sensors + PLC + BMS
Application Scenarios
Primarily outdoor open spaces: commercial plazas, landscapes, stadiums, parks
System Integration
Some provide full solutions; others supply only core misting equipment
Energy Efficiency & Low Carbon
EER ≥15 (up to 20+ for premium systems), meets green building and low-carbon requirements
International Certification Note: Core components (high-pressure pumps, nozzles, controllers) from mainstream suppliers have CE, UL, ISO 9001, and ISO 14001 certifications. They operate stably across global power systems (110V/220V/380V, 50/60Hz).
X. ESG Empowerment and Green Building Certification
Certification System
Scoring Points
LEED v4.1
SS Credit: High-reflectance roofing + evaporative cooling to reduce heat island effect WE Credit: Rainwater harvesting for landscape misting
WELL v2
Thermal Comfort: Outdoor microclimate regulation Mind/Community: Natural cloud/fog landscape effects
Low-Carbon & High Efficiency
EER ≥20; most cooling provided by water latent heat of evaporation
XI. Frequently Asked Questions (FAQ)
Q1: Why must droplet size be controlled to ≤4μm? A: Micro-mist droplets evaporate rapidly in air and completely evaporate before reaching the ground, preventing slippery surfaces and wet clothing.
Q2: How to prevent nozzle clogging? A: Multi-stage water filtration (≤5μm), automatic nozzle flushing on first startup, ruby or ceramic nozzle cores, and optional UV-C sterilization module.
Q3: Does the system consume a lot of energy? A: Cooling is mainly provided by the latent heat of water evaporation. EER ≥20. Power consumption is only 1/3 to 1/4 of traditional compressor air conditioning.
Q4: Can the outdoor cooling effect be quantified? A: Yes. Under 35°C dry-bulb and 45% RH, local temperature drop of approximately 5–8°C can be achieved within 3 minutes.
Q5: Can the system integrate with building management or intelligent control platforms? A: Yes. It supports Modbus RTU/TCP and BACnet protocols and can interface with Building Management Systems (BMS) for remote monitoring and zoned control.
Q6: How does the system ensure public health? A: Multi-stage filtration + UV sterilization + anti-drip design + automatic pipe draining. Water quality meets GB17324 standards, effectively controlling Legionella risk.
Authoritative References
ASHRAE Handbook—HVAC Applications, 2020
ISO 14001:2015 Environmental Management Systems
LEED v4.1 Green Building Rating System, USGBC
WELL v2 Building Standard, IWBI
High-Pressure Cold Mist Engineering Technical Specification (CECS 447)
Hygienic Standard for Drinking Pure Water (GB 17324)
International water treatment and high-pressure atomization technology public materials
Taining Kechuang High-Pressure Atomization Cooling System Product Technical Manual and Project Case Collection (2024–2026)
Data Note: All technical parameters and project data cited in this document come from public sources and field measurements. Data is current as of March 2026. Project selection should be based on comprehensive assessment of local climate, geology, and the latest standards.