Energy-saving Technology of Clean Room in Operating Room Decoration
1. Frequency of ventilation
The clean room maintains a certain air flow to maintain cleanliness and particle number. Flow is determined by the number of ventilation per hour, which also determines the size of the fan, construction configuration and energy consumption. On the premise of maintaining cleanliness, the reduction of air velocity can reduce the cost of construction and energy consumption. Reducing the number of ventilation by 20% can reduce the size of the fan by 50%. Air cleanliness is more important than wasting energy, but new research results have been documented to reduce cleanliness costs.
There is no consensus on the number of breathing cycles. Many of the criteria are out of date and are based on the old idea of using inefficient air filters. According to the survey, the recommended ventilation times for clean rooms in ISO Level 5 specification ranged from 250 to 700.
2. Motor efficiency
The motor consumes most of the electricity in the clean room. Continuous motors consume a small amount of electricity each month. Suitable for the improvement of efficiency in the field. Suitable for the adjustment of size in the field. After innovation, the economic effect is mostly good. If efficiency is increased by a few percentage points, profits can be added.
Using ineffective motors does not necessarily cost too much. Efficiency means small, reducing the load as much as possible before changing the size of the motor. When the input quality changes, the application of variable speed drive (VSD) can improve operation efficiency.
3. Dual Temperature Freezing Cycle
Designers can use parallel circulating pipes to break them into two pieces, so that refrigerators can work under absolutely no harsh conditions when they need large amounts of cold. Stop the medium temperature cycle (e.g. 55oF to 65oF) with a public refrigerator. Its operation is optimized to stop the temperature of chilled water, which can meet most of the plant's needs. Another smaller efficient refrigerator provides a lower temperature cycle (e.g. 39oF to 43oF) to meet the demanding parts of the load.
This scheme can quickly add 25% or more improvement in the efficiency of the whole refrigeration unit. For refrigerators with opposite capacity, low-temperature tasks cost much less than high-temperature tasks.
4. Free Cooling
It is economical to use the air inside to stop cooling, which is commonly used in commercial buildings. Another "self-cooling" scheme is suitable for chilled water with constant demand and fragments of fan coil units, such as clean rooms.
Free cooling technology indirectly applies cooling towers in high or low humidity environments to produce chilled water, increasing or replacing the use of refrigerators. According to the change of weather, the use of self-cooling fragments can increase the energy consumption of cooling fragments to one tenth (from 0.5 kW/t to 0.05 kW/t).
By indirectly stopping heat exchange with process load, the higher temperature atmosphere in the application of self-cooling technology can take several hours longer than the time spent on stopping heat exchange fragmentally in secondary or tertiary heat exchanges. The temperature difference between the cooling water and the condensate separated by the plate heat exchanger is very close (for example, only 2oF). When the temperature and humidity are quite low, the cooling tower can operate independently without fan. According to the temperature and humidity chart, many central authorities have a lot of time each year to stop self-cooling.
5. Centrifugal Compressor
The improvement of the air compressor wastes a small amount of power. Centrifugal compressor is oil-free, much more efficient than screw compressor. But centrifugal compressors can not idle, which makes them inefficient under low load conditions. The ineffective and economical method is the combination of centrifugal and screw compressors. Centrifugal units are selected to meet the basic load, and smaller screw units are used to meet the peak load. Compression units should be equipped with heat recovery scraps.
Another option is to install a high-efficiency centrifugal compressor as a large compressed air throughout the site, with an extra enlarged gas storage tank and a connecting pipe as a buffer. This ensures that the whole plant maintains a constant load, increases the loss of equipment caused by loading and unloading, and reduces energy wastage.
The above content is provided by Shandong Jingzhiyuan Purification Engineering Co., Ltd. To learn more about operating room decoration knowledge, you can pay attention to our website: http://www.sdyhrs.com Thank you!