Background
The site is a rooftop equipment deck on a residential building, with several air-conditioning outdoor units installed close together. Direct summer sun, plus the heat each unit rejects, keeps the deck noticeably hotter than ground level. As condenser inlet air warms up, cooling capacity drops and the compressors stay under heavy load for longer. Forced ventilation or a simple sun shade is constrained here by limited deck space and by units discharging into each other’s air path.
Configuration
Stainless steel misting lines run along the inlet side and between unit banks, grouped by unit position and switched per group. Droplets are held at 5–15 µm so they evaporate before reaching the coil, keeping fins dry and the deck free of standing water. Lines follow the deck edges to leave service access clear, and the control box is separately protected.
Delivery notes
The project is located on a roofing platform in urban dwellings, where a number of air conditioners are centralized.The summer direct-fired and excretion of the outer aircraft itself, the platform temperature is significantly higher than the ground, and the cooling efficiency is reduced and the compressor is operating at a long high load as the outer condenser moves into the wind temperature.
The usual practice is to install mandatory ventilation or sunshields with fans, but the platform space is limited and the ventilation is interrupted.The project is being modified to place high pressure mists in front and between the outer aircraft, using droplet 5-15 micrometres to form a cryogenic screen on the windward, droplet to evaporate essentially before reaching the heat exchanger, without wetting the equipment and the ground.
Results
A steady low-temperature mist curtain forms across the inlet side. Condenser inlet temperature drops and periods of heavy compressor load get shorter. The deck surface stays dry, with no wet fins or ponding. Misting is interlocked with unit operation, so it does not run outside hot hours.
This page explains the configuration approach for a similar scenario; it is not a commitment to a specific outcome. Actual results depend on area, ventilation, water quality, nozzle selection and running hours, and are subject to a site survey and the signed contract.
