With the improvement of modern science and technology, the cultivation of fungi, flowers, vegetables, livestock and poultry is becoming more and more standardized and large-scale. The degree of advantages and disadvantages of indoor environmental factors has a direct impact on the growth and economic benefits of plants, livestock and poultry. This includes illumination, temperature, humidity, carbon dioxide concentration, etc., among which in addition to illumination conditions, other factors can be achieved through manual control. According to the different environmental conditions required by plants or animals in different growth stages, we can artificially adjust and control these conditions to favor the growth of plants or animals. The breeding air conditioning fresh air energy saving system produced by our company can take into account all kinds of parameters and energy utilization, so as to save energy to the greatest extent for enterprises and provide the best environment for the growth of organisms and animals.

The air conditioning system

The selection of air conditioning system can be based on the local climate characteristics and natural conditions of users, choose different types of refrigeration and heating, fully compare the cost performance and operation cost, reasonable and scientific allocation of resources can not only reduce the cost of input, but also can improve the output ratio and increase economic benefits.

The ventilation system

There are many ways of ventilation, especially the fresh air system with heat and cold (latent heat exchange) recovery is the best.

This fresh air system has the following characteristics:

1. When the fresh air system is turned on, the heat exchange device built in the machine can effectively recover the cooling amount or heat in the exhaust air and carry out pre-cooling or heating on the fresh air, with remarkable energy saving effect. Generally, 50-70% of the cold and heat can be recovered and 35-55% of the wet recovery can be achieved.

2. It is faster to adjust the concentration of carbon dioxide in the room, and the unit has the functions of simultaneously supplying and exhausting air, which can discharge carbon dioxide, ammonia and other harmful gases in the breeding space more quickly while transporting fresh air.

3. The configuration of temperature, humidity and CARBON dioxide sensors can realize the automatic operation control of the breeding place.

Energy-saving effect analysis

Taking vegetable production base as an example, the air conditioning system adopts water-cooled screw unit for centralized cooling, and each room is independently adjusted through PLC control system, which can better control various values to meet the requirements of different growth stages.

Example: Vegetable production space: length * width * height =40*8*7=2240m3

The principle of fresh air heat transfer and the calculation of heat transfer efficiency and heat transfer are shown in the figure below:

Model selection calculation data

It can be seen that the heat recovered by each device is 57Kw, so the total heat recovered by the four devices is 57*4=228Kw, the heat recovery efficiency is 60%, and the wet recovery efficiency is 37.1%.

The whole growth cycle is calculated according to 1/3 time of starting up, and the fresh air load is 133Kw. The recovery efficiency is calculated at 60%, and the heat recovered from the fresh air exchanger is 80Kw.

After deducting the running consumption of the fan and the energy loss of the enclosure structure of the fungus house, the final energy saving can reach more than 35%.

Through the above case analysis, it can be seen that large-scale breeding mode supporting specialized equipment can create the greatest economic benefits for users.

With the advent of the 5G big data era, network evolution and the rapid development of the data industry, the scale of large data centers(DC) is getting larger and larger, and the power consumption of data centers is also increasing. According to statistics, the national DC electricity consumption in 2018 was 160.889 billion kW/h, surpassing Shanghai's total electricity consumption in 2018, accounting for 2.35% of China's total electricity consumption. Moreover, It is expected to reach 266.792 billion kW/h in 2023, The average annual growth rate will reach 10.64%, which is approximately equal to the power generation capacity of 2.5 Three Gorges.

More importantly, power consumption has become a bottleneck restricting the development of data center services. The following table shows the proportion of energy consumption of each system configuration in the data center. From the analysis of the data in the table, it can be found that in the non-IT energy consumption, about 63% of the loss is caused by the data center cooling system.

In response to the high energy consumption of the data center cooling system, various energy-saving solutions have been tried in the industry. At the result, Indirect Evaporative (IEC) is one of the most promising cooling solutions.

The following figure shows the working principle diagram and product structure diagram of indirect evaporative cooling system.

The indirect evaporative cooling system mainly includes three core components: plate heat exchanger, spray system, and compressor supplementary cooling system. During the cooling process, the air to be treated inside the data center passes through the air heat exchange device. Firstly, the outdoor air is used to cool the closed indoor air. At the same time, the spray system spray water uses the heat of the outdoor air to evaporate in the plate heat exchange device. Absorb heat to reduce the temperature of the air to be processed. As the result, making cool the circulating air inside the DC to the greatest extent. Throughout the process, indoor air is a closed loop system, while outdoor air is an open system. Outdoor air does not allow enter the DC, thus preventing moisture and pollutants in the outdoor air from entering the DC. Since the treated air does not directly contact with water, its moisture content remains unchanged, realizing isohumid cooling of air.

Operating mode

Depending on the outdoor temperature, the Evaporative Cooling Air-conditioning can adopt three operating modes.

Taking a single set of system (selecting BXB2000-2200-12.0 plate heat exchanger) as an example, the selection calculation shows that compared to a pure refrigeration and air-conditioning system, adopting an indirect evaporative cooling system. The air sensible plate heat exchanger can recover 194kw per hour. Spray system can absorb 686kw of heat, and recover a total of 880kw of heat. It can be seen that the use of an indirect evaporative cooling system can save 352kw*h of electricity per hour for the evaporative cooling system, and the energy saving effect is significant.

Case show