Spray cooling is an outdoor space environment cooling system.

 
Artificial fog cooling principle for aerosol space environment, the principle of evaporation heat, cooling end diameter between 1-10 microns of fog particle diffusion to cool the area, in the process of diffusion to evaporate, and absorb a large amount of heat, the region scientific statistics one kilogram of water to inspire a floating artificial fog floating state, be equal to the effect of dissolved seven kilograms of ice, Generally, the cooling effect can reach 6℃-10℃, and the cooling range can be 14℃ in extreme cases.
 

Introduction

Real estate landscape architecture has experienced many technological evolutions such as artificial water system, fountain and artificial fog system with its landscape technology. Consumers' demands have also changed from pursuing single and static landscapes to pursuing more abundant and varied landscapes. Based on landscape construction, new demands such as healthy, green, environmental protection and low carbon concepts have been put forward.
 

The theory

Per gram of water can be for outdoor air cooling, the spray cooling efficiency is very high, in theory, the spray cooling is the amount of energy needed to overcome the surface tension of the water increases, the energy needed to 1 cubic meters of water into the cube, 10 microns needed by its surface tension, and the latent heat of evaporation is as high as 2.2 billion joules, its theory can effect comparing is as high as 50000, And air conditioning is limited by the law of thermodynamics, 30℃ cooling 5℃ theoretical maximum energy efficiency ratio is about 60.
 
The effect of spray cooling is greatly affected by air humidity, and the higher the relative humidity, the worse the effect. Therefore, the indoor effect of spray cooling is poor, especially for the indoor ventilation is poor, the effect of spray cooling is limited.
 
As the urban heat island effect becomes stronger, greening cooling is not the best measure. In fact, greening cooling is because more than 99% of the energy is lost due to the evaporation of water into the vaporization heat of water, while spray cooling has a much higher cooling efficiency, but spray cooling used in public places has high requirements on water quality.
 
The urban heat island effect is mainly influenced by the following factors: evaporation reduction, reflection reduction of urban underlying surface, and energy input.
 
Its strength effect is: evaporation reduced 0.05g/s㎡, heat input 120.9 W; Urban underlying surface reflectivity reduced by 10%, heat input 30W /㎡; Artificial energy input 10W /㎡, the total heat input in the city increased 160.9W /㎡, due to the influence of air convection, the actual heat input is about 20W /㎡, calculated temperature rise is about 3.5℃, which is consistent with the actual comparison. When the air circulation slows down in summer, the heat input will increase sharply. Due to the low adaptability of the urban evaporation system, the urban temperature will rise sharply. At the same time, the accelerated operation of air conditioning and thermal power plants will cause a vicious cycle, exacerbating the urban atmospheric temperature rise. Based on these data, it can be concluded that the best way to solve the urban air heat pollution is to increase the evaporation capacity. Due to the limitation of urban installation, the use of spray system is an efficient and economical way. When evaporation is 0.05g/s㎡ (11 hours of daytime is equivalent to 2mm rainfall), the average atmospheric temperature drops to 7℃.
 
Spray cooling has been applied for a long time. In 2002, the solution of outdoor large-scale spray cooling system was provided. However, the large-scale application was first applied in Aichi World Expo in Japan, and the most successful application was in Shanghai World Expo in 2010.
 

The principle of Air conditioning spray cooling

 
For the most part, the temperature outside can't be controlled, and many times people have to spend hours or more in hot, boring places such as piazzas, sports stadiums, playgrounds, etc. In these outdoor environments, the air conditioning is not working and people must endure the heat everywhere.
 
With the spray cooling system, you can locally control the temperature of the environment. In the process of vaporization, the water particles emitted by the spray cooling system should absorb a lot of heat from the surrounding environment, so as to reduce the temperature of the surrounding environment, which is an effective means of heat prevention and cooling. In the middle of summer, when the temperature in the city is above 35℃, even with an umbrella and sunglasses, the direct sunlight from the sun and the reflection from the ground still make people feel hot. Under the action of spray cooling system, the air temperature can be reduced to 25℃, 14℃ in extreme environment, reaching the best temperature of the human body, so even in the hot outdoor, still feel comfortable.
 
 

Improve air quality in small environment

After the raw water is treated by professional water, and through the fog effect produced by the high-pressure microhole impact technology, a large number of anions with the name of "vitamin in the air" can be produced, creating a unique "forest oxygen bar" in the city, improving air quality and beneficial to physical and mental health;
 
cool
Aerosol molecules can effectively absorb air heat and reduce local environmental temperature. Their low operating cost and effective cooling effect have been widely used and recognized in world Expo and many scenic spots, and have become a new element for outdoor cooling in public Spaces and residential areas.
 
equipment
1, pump station unit: the use of pressure sensor and frequency converter to pump station pressure self-regulation, can adapt to 100kg/h~1600kg/h flow rate between the stable adjustment, and a variety of protection functions.
 
2, spray unit: precision processing of copper or stainless steel micro spray nozzle with fine spray, no wear, small pressure loss characteristics. Size: 0.1524 mm; 0.2 mm; 0.3mm, spray volume 3~4kg/h(P=7Mpa)
 
3, the control unit: system according to the requirements of the project, with a programmable control adjusted for each state point system, display and control, monitoring all the systems function, in order to avoid failure and failure can be shown, when the control unit external humidity sensor and humidity sensor and external controller of servo mechanism, can constitute a fully automatic system.
 
4, high pressure shunt valve unit: high pressure shunt valve can achieve high pressure water control predetermined program and predetermined spray unit multi-way water supply or drainage according to requirements.