As a technological innovation, the emergence of greenhouse has completely solved the diet tradition that people only eat seasonal vegetables, and made it possible to diversify food. However, for greenhouse growers, temperature is the financial way, and how to better solve the problem of greenhouse temperature control is always a puzzle in their hearts.
It is a routine and necessary heat preservation project to cover the outside of greenhouse with grass mats, use hollow bricks or set up insulation layers. In order to adjust the temperature and humidity in the shed, growers began to use coal-fired stoves and other heating equipment, using coal and straw as energy sources. However, this practice, on the one hand, has high energy consumption and heavy pollution, and for growers, it is normal to be totally disgraced. The most important thing is that the temperature can’t be maintained continuously. Without coal, there will be no temperature. In addition, when the coal-fired heating equipment is in operation, a special person should be on duty. After all, there is no shortage of news about the fire on Mars.
Some people have tried to smoke around the greenhouse, trying to reduce the heat loss in the greenhouse by avoiding the radiation of heat outside the greenhouse to the high altitude. However, as everyone knows, once smoke leakage is discovered, it will undoubtedly be fatal to the vigorous growth of crops.
Until the emergence of air energy heat pump and fan coil unit, growers have a safe and reliable solution to the winter heating problem.
Air-energy heat pump is a kind of equipment that does not burn coal at all. It is matched with the heating terminal equipment-fan tray to complete heating. The former produces heat, while the latter evenly disperses heat. What are their advantages?
First, the heating is fast, the heat is evenly dispersed, and the heating efficiency is high. The principle of air energy heat pump is to absorb a large amount of free heat energy in the air for heating, and the heat is dissipated through fan coil units, and then spread to the greenhouse from the air outlet.
Data show that the heating efficiency of ordinary coal-fired boilers is only about 85%, while the heating efficiency of air-energy heat pumps can exceed 200%, up to 400%. Heat pump consumes 1 kWh of electricity and can “carry” several times of heat energy from the air.
Second, the temperature and humidity can be adjusted freely. In winter greenhouse planting management, the most difficult thing is to control temperature and humidity, because greenhouse flowers and vegetables have higher requirements for temperature and humidity, and even in different growth cycles, the requirements for temperature and humidity are different. Traditional coal-fired boiler heating can only play a role in temperature, but it is difficult to accurately control the humidity, thus affecting the normal growth of flowers and vegetables and causing losses to growers. The combination of air source heat pumps and fan coil can adjust the temperature and humidity freely according to different climate and crop growth cycle.
Third, save trouble and labor. The outstanding advantage of air-source heat pump is that it doesn’t need special person to guard it, so it completely bid farewell to the days of working day and night, and it is easy to plant with remote control and one key in hand.
Fourth, high security. In the past, coal-fired boilers were at risk of fire at any time, while air-source heat pumps did not use fuel, and were not flammable and explosive, so they no longer had to worry about fire accidents every night.
Fifth, save money. Some people have made a rough calculation. For a plastic greenhouse with an area of 700㎡, it used to use about 3 tons of coal /100㎡ in each heating season, which is equivalent to about 16,800 yuan in terms of coal price 800 yuan/ton. However, the air energy heat pump with the same heating effect only needs a quarter of the heating investment.
It can be said that it is with the air source heat pump that makes growers worry, save effort and save money that crops grow more gratifying, and growers’ wallets are bulging, and the main thing is that the sky is bluer.
