How to choose a flower greenhouse cooling system

First of all, first to understand the principle of the role of the fan. When the outdoor hot air is sucked through the water-absorbing wet curtain, the moisture on the wet paper is absorbed by the moisture, thereby reducing the temperature of the air entering the greenhouse. Typically, the "wet wall" consisting of wet curtains, water distribution systems, water pumps and water tanks is built continuously along the walls of the greenhouse, while the fans are concentrated on the other side of the greenhouse. evaporative cooling pad must be kept moist to ensure the completion of the evaporation process, according to the size of the greenhouse and the area, choose the appropriate fan installed in the wet curtain on the wall, so that the air through the greenhouse smoothly.
The effect of evaporative cooling is related to the degree of drying of the air, that is, the difference between the temperature of the wet bulb and the temperature of the dry bulb. The temperature difference between the wet and dry bulbs of the air is not only changed with the geographical position and the seasons, but also changes in the course of the day. Although the change in dry bulb temperature may be as high as 14 ¡ã C a day, the rate of change in wet bulb temperature is only about 1/3 of the dry bulb humidity. Therefore, in the high humidity area at noon, the evaporation system is still able to cool, which is required for greenhouse production.
Selection principle

The choice of wet curtain size is to make the wet curtain system achieve the best results. Usually in the flower production greenhouse is often used in 10 cm thick or 15 cm thick fiber evaporative cooling pad. 10 cm thick fibrous wet curtain, greenhouse cooling pads in the wet curtain through the air speed of 76 m / min when the best results. 15 cm thick paper wet curtain requires an air speed of 122 m / min.
The choice of what kind of thickness of the wet curtain, in addition to considering the location of the geographical location, climate conditions, but also should see the greenhouse wet curtain and the distance between the fan and the temperature of the flower crop sensitivity. If the distance between the fan and the wet curtain is larger (usually more than 32 meters), it is recommended to use a 15 cm thick wet curtain; if the cultivated flowers are more sensitive to the greenhouse temperature, the tolerance to high temperature is poor, it is recommended to use 15 cm thick Wet curtain. On the other hand, if the distance between the wet curtain and the fan in the greenhouse is small or the flower is less sensitive to temperature, a 10 cm thick wet curtain can be used.
From an economic point of view, 10 cm thick wet curtain price is less than 15 cm thick evaporative cooling pad, only its price of 2/3.
In addition, the wet curtain of the larger the better the size of the air inlet. Because the size of the inlet is too small will increase the static pressure, which greatly reduces the efficiency of the fan, increase power consumption.
Estimation of greenhouse cooling equipment:
1. Greenhouse required ventilation = greenhouse length ¡Á width ¡Á 8cfm (Note: cfm for the air flow unit, that is, cubic feet per minute), the unit floor area ventilation should be based on altitude and light intensity to adjust.

2. Estimate the required wet curtain area. If you choose 10 cm thick wet curtain, celdek evaporative cooler pads area = greenhouse required ventilation / wind speed 250. If you use 15 cm thick wet curtain, wet curtain area = greenhouse required ventilation / wind speed 400. Calculate the wet curtain height by dividing the calculated wet curtain area by the length of the ventilation wall covered by the wet curtain. In wet climates, fan airflow and wet curtain size should be increased by 20%. In accordance with the principle of hot air on the cold air in the next, the fan wet curtain should be installed in the greenhouse above the early construction of the greenhouse as well.
However, in recent years, high-grade potted greenhouse greenhouse wet curtain installation has continued downward trend. Now in the greenhouse construction process, the general will be the fan height of 1/3 installed in the seedbed below, 2/3 installed in the seed bed above the wet curtain from the ground above 30 cm began to install, so the installation is mainly based on planting On the crop actually felt the temperature to design. Because the top of the greenhouse is very high, but the plant foliage can not feel, so it does not matter, there is no need to reduce the plant contact with the regional temperature, while the fan installed in the seedbed below, is conducive to plant root growth.

How to extend the service life of the evaporator cooling fan

Check the evaporative cooling fan fan impeller for cracks, wear, dust and other 
defects at the beginning of the operation of the evaporator cooling fan fan and 
all the regular inspection. It is necessary to keep the evaporative cooling fan 
fan impeller clean and regularly brush with the wire to the above dust and rust 
and so on. Because with the lengthening of the running time, these dust can not 
evenly attached to the evaporative cooling fan fan impeller, causing the impeller 
balance damage, and even cause the rotor vibration. Evaporative cooling pad The 
fan impeller needs to be repaired as long as it is repaired. If conditions permit, 
you can use the portable test balance in the field balance. Before actuating the 
balance, it is necessary to check that all tightening bolts are tightened because 
the evaporative cooling fan fan has been running for an extended period of time 
and these bolts may have loosened. To do the above to extend the life of the 
evaporator cooling fan fan is very important.

Indoor environmental testing requirements

Claim
Indoor environmental testing requirements can be broadly summarized as five aspects.
(1) Representative: sampling time, sampling sites and sampling methods must comply with the relevant provisions of the collection of samples to reflect the overall situation.
(2) Integrity: The main emphasis on the implementation of the test plan should be complete, that is, the number of samples must be planned and the integrity of the measured data, systematic and continuity.
(3) comparability: the requirements of the laboratory or the same laboratory on the same sample of the determination of the results comparable to each other.
(4) Accuracy: the measured value and the true value of the degree of compliance.
(5) Precision: The measured values ??have good reproducibility and reproducibility.

JF30 environmental air conditioning introduction

Summer arrived, the weather gradually hot up, I believe we will increase the demand for air conditioning, choose a good air conditioning has become a lot of consumers every summer troubled.

It is recommended for the JF30 environmental air conditioning, produced in Nanning Science and Industry Co., Ltd., mainly for office, bedroom, bar and so on a smaller area of ??space, this machine called: mobile home environmental air conditioning JF30.

This section configuration stalls are divided into three wind speed high, medium and low for you to choose;

Full-function remote long-range remote control, touch dual control system to solve the human operation;

LED lights display, elegant;

1-9 hours timer function;

Centrifugal fan design, large air volume, running more quiet and smooth, imitation natural wind, sleep wind, the standard wind free choice;

Large capacity water tank, open spray water circulation technology, cooling time faster and longer;

Easy water injection, water level clear, unique water pump sound, light alarm function;

3 seconds delay start, the motor is more durable;

From top to bottom automatic air supply, arbitrary choice, air supply area.

Large air volume: 3000 cubic meters per hour

Power: 100W

Voltage / frequency: 220V / 50Hz

Fan Type: Centrifugal

Dimensions: 520 * 390 * 1120cm

Net weight: 19Kg

Home mobile environmental air conditioning use of water centrifugal effect, the indoor cooling, so as to achieve the effect of energy saving and environmental protection, power is generally about 100W, or even smaller, the equivalent of a power of light, spend the least money, green life good life.

Advantages of cooling pads

Using new materials and space cross-linking technology, high water absorption. High water resistance. Anti-mildew. long lasting.

Product evaporation than the surface, cooling efficiency of 80% or more

Products containing surfactants, natural water absorption, diffusion speed block, lasting performance. A drop of water 4-5 seconds can be expanded to complete.

Natural water absorption 60-70mm / 5 points; 200mm / 1.5, fully meet the international industry standards.

Products do not contain easy to make skin allergic phenol chemicals, the installation of the use of non-toxic, safe. Energy. Environmental protection. Economical and applicable.

A variety of frame size: galvanized sheet. Stainless steel. Aluminum. And a variety of materials, effective and convenient customer choice.

What is the cooling system calculation method?

We have a long-term practice combined with a relatively simple and more reasonable calculation method: that is, the volume calculation method, some methods meet the basic theory of negative pressure system.The specific algorithm is as follows:
One: first know the building volume to be installed (length * width * height) unit meters.
2: the size of the known building divided by the selected fan air volume: such as: FJ48-1250C fan air flow 670 cubic meters / minute. = Single fan air exchange time.
Three: the exchange time of a single fan multiplied by 60 converted into seconds.
Four: the general animal and plant environmental comfort of 40 seconds -50 seconds.
Five: the number of the three divided by the number of 45 is the number of selected fans of the value of the fan.
For example: know a pig farm a pig house length of 70 meters, width of 8 meters high 3 meters.
One: pig house volume: 70 * 8 * 3 = 1680 square meters.
Use FJ48-1250C exhaust fan. Get this fan air volume of 670 cubic meters / minute.
Two: 1680/670 = 2.51 cubic meters / minute = 150 seconds.
Three: 150 * 50 = 3 units.
Because the three fans is the maximum. So the choice of evaporative cooler pad more than two to three square meters, which is installed 18 square meters evaporative cooler pad appropriate.
In addition: you can raise the wind through the pig ceiling or increase the windshield to achieve the effect of cooling.

Peaceful Christmas, Merry Christmas

Now when you walk in the bustling pedestrian street, you will hear the music, you will see that Christmas is coming, accompanied by the first wave of snow after the winter, Christmas has been the pace we go quietly close some stores have already decked out with lights, the store is decorated with a beautiful Christmas tree, Santa Claus in front of the sculpture accompanied by dazzling lights and decoration, the atmosphere romantic and festive atmosphere, the colorful Christmas tree already encrusted the bright stars, you may be infected by this atmosphere.

Peaceful Christmas, Merry Christmas Christmas now seems as full of Valentine's Day with romantic elements, at a time when she would be clamoring to buy her a pair of gloves do you, perhaps she will mysteriously on the day of Christmas out from behind a white scarf to say to you "MerryChristmas"! At this point if you feel a little happy too. At a time when if you will think of high school someone will ask you for a dime coin, when they collected 24 coins, they will use the collected coins to buy a safe fruit to the people they like, and wish him peace and happiness!

Listening to the cheerful "Jingle Bells" music, as if the deer heard the bell sound, imagine the fairy-tale world, the white snow, cute elk pulling Santa sleigh carrying the kind of slowly approaching, wreathed in smiles Santa appears strong build tough, long white beard Yingxue more elegant! Christmas red robe like a fire burning white earth, in the cold winter night at the moment of peace coming, kind of cute Santa will climb over the roof through a chimney, like a sleeping child in each distribution of gifts for their children send blessings and peace.

In the Christmas night comes, about a couple of friends, in this Christmas Eve open Christmas PATRY enjoy the carnival, all covered with bright stars and a variety of ornaments on the Christmas tree will, on every Christmas tree are gives the most sincere blessings and best wishes, peaceful moment in the night of arrival, the dreaded year, and all unhappy all throw away, promise a good wish to wish each other a Merry Christmas, Christmas Star will take the wish to fly anywhere in the world, then everyone will be blessed. Life blessing everyone peace and happiness!