What are the ways to warm up agriculture? Greenhouse heating is good in that way

1) Electric heating.

Compared with other methods, electric heating needs to be heated through secondary energy conversion, the energy quality is high, the cost is also high, and the utilization rate of thermal power generation is about 30%, so although the electric heating efficiency is very high, but from the perspective of energy utilization, the efficiency of electric heating is actually very low. Therefore, in the planting greenhouse, we rarely see electric heating equipment. However, in order to ensure germination and emergence rate, it is very feasible to use electric heating for local heating in seedling type greenhouses.

2) Hot blast stove.

The hot blast stove used in the greenhouse can be divided into coal-fired, oil-fired and gas-fired hot blast stoves according to different fuels. Since the hot blast stove is a direct heating method, there is no boiler start is the loss of heat, so the heat of the hot blast stove is almost all used for greenhouse heating. In addition, the hot blast stove starts the speed block, the greenhouse heats up quickly, and in the case of a small temperature difference, it can be closed and opened at any time to adjust the internal temperature of the greenhouse.

The disadvantage is that the temperature inside the greenhouse is not as uniform and fluctuates greatly. The heat duration is short, and it can be started and stopped at any time, so that the temperature in the greenhouse will not be overheated.

3) Heat pump heating.

A heat pump is a device that collects heat from a low temperature area and transmits it to a high temperature area. Heat pumps and refrigerators are two types of equipment that have the same principle and opposite functions. Heat pumps can be divided into air source heat pumps, water source heat pumps, ground source heat pumps, etc. according to the different heat acquisition mediums.

Groundwater and underground heat energy are stable all year round, and by extracting the heat in winter and then working through electricity, energy consumption can be greatly reduced, and the daily use cost is low.

4) Hot water boiler heating.

The fuel used in hot water boilers can be coal, oil, and gas, and the medium used to heat the greenhouse is hot water. The water is heated by fuel combustion, and the hot water is heated by hot water pipes arranged in the greenhouse and the terminal heating equipment. The denser the pipe arrangement, the more uniform the temperature in the greenhouse, and the longer the storage time of hot water for heat, the use of hot water for heating, the temperature fluctuation in the greenhouse is smaller.

1. Increase the application of organic fertilizer, 2. Cultivate and loosen the soil. 3. Ground covering. 4. Set up wind barriers. 5. Irrigation and drainage can take plastic greenhouses, plastic greenhouses plus infrared, plastic greenhouses plus ground, etc.

Greenhouse heating, greenhouse finned tube radiator plays a very important role in the heating system in the greenhouse field, finned tube radiator is a kind of heat dissipation equipment, it is the key to the heat dissipation efficiency of the heating system. The greenhouse finned tube radiator is made of steel tubes, and the metal strength of the steel is very high, so the pressure-bearing capacity of the greenhouse finned tube radiators made of them is also very strong.

Finned tube radiator.

With the protection of anti-rust paint, the finned tube radiator made of steel pipe in the shed will be more durable, so as not to oxidize the steel pipe too quickly, and spray anti-rust paint, which will not form white spots and protect the steel pipe. <>

Finned tube radiator.

In order to adapt to a more harsh environment, some of the greenhouse finned tube radiators will also carry out galvanized high anti-corrosion treatment on the steel pipes, and the chain mountain galvanizing liquid will be protected at the concave and convex places of the steel pipes, so that the greenhouse finned tube radiators made of them will last longer, and the galvanized treatment will be more convenient and save the time of purification. <>

Finned tube radiator.

1. Heat the fire.

Furnace heating is the most commonly used traditional heating method with a long history. A fixed stove can be used, or a makeshift stove can be used for heating. Furnace heating is mainly used for greenhouse Huai loss, and later with the development of plastic greenhouses, it is also gradually applied to the production of greenhouses in early spring.

2. Warm up with hot water.

Use heating pipes and radiators to heat the heat. The use of hot water heating method in China is not very common, and it is only limited to the use of large glass greenhouses and contiguous concentrated greenhouse groups. The advantages are:

It is conducive to the heating of large-area greenhouse groups; When heating, the indoor temperature can be kept uniform, which is convenient to promote the rise of ground temperature; The residual heat has a long time, and there is a period of heat preservation after the heat is stopped; There are no harmful gases and soots.

3. Steam heating.

It is less used in our country, and its heating method, the advantages and disadvantages are the same as that of hot water heating, but the hot water is changed to hot gas, and it is also convenient for soil disinfection. It can use the waste heat and exhaust gas of the power plant to combine with agriculture.

1. Increase the thermal insulation of the back wall. When building the back wall, you can paste a layer of bricks on the earthen wall, or build a hollow insulation wall, and fill the wall with straw or polystyrene foam, the effect is also very good, and the cold area can be directly built into a fire wall, which is convenient for heating.

2. Dig a cold-proof ditch outside the shed. Dig a cold-proof ditch with a depth of 40-60 cm and a width of 40-50 cm outside the greenhouse, fill it with sawdust, weeds, horse manure, straw and other insulation materials, and seal the ditch with soil after being solid to achieve the insulation effect. When the cold snap is approaching, add a straw curtain or corn stalk around the shed at night to increase the greenhouse temperature by 2-3; It can also be smoked around the greenhouse to prevent the heat loss around the greenhouse.

3. High ridge cultivation is used in the greenhouse. When planting, the ridge can be mulched, which can increase the ground temperature by 2-3. When using flat furrow cultivation, a small arch shed can be added to increase the temperature.

4. Hang reflective curtains in the shed. Hanging plastic film or tin foil coated with metal layer on the back wall of the greenhouse, hanging 1 meter reflective curtain every 2-3 meters, reducing the absorption of heat energy by the wall, can increase the temperature in the shed by 2-3, and at the same time increase the light in the shed, and promote the coloring of fruit trees, tomatoes and other fruits.

5. Set up temporary heating measures. In order to alleviate the impact of meteorological disasters such as cold snap and frost and the bad weather without light on cloudy days on the normal growth of greenhouse crops in a timely manner, 2-3 heaters with a power of 1600-2500 watts can be temporarily set up in the shed.

There are three common heating methods, hot water, hot air and electric heating.

Each method is quite convenient to use in practice, and can reach the desired room temperature in a very short time.

Heating heating: In case of extremely cold weather, you can add a stove or turn on the heating in the greenhouse, but special attention should be paid to prevent gas poisoning from flowers and staff, and a chimney should be installed to output the gas outside the shed. Plus mulch:

At night, cover the shed in the greenhouse and cover the straw curtain, and add grass or corn stalks around the greenhouse at night, which can increase the temperature by 1-2.