Energy saving design of SPF animal room laboratory
Energy saving design of SPF animal room laboratory
How to control the energy saving of spf level animal room laboratory?
The load of each SPF unit varies with the animal species, quantity and temperature requirements. At the same time, it can be seen from the basic design parameters of the SPF animal room laboratory, which has a wide range of temperature and ventilation times. ..
Text label: spf level animal room design, experimental animal room design
Energy-saving design of spf-class animal room laboratory
How to control the energy saving of spf level animal room laboratory?
The load of each SPF unit varies with the type, quantity, and temperature of animals. At the same time, it can be seen from the basic design parameters of the SPF animal room laboratory that the wider temperature and ventilation frequency range also It is determined that its cooling and heating load may vary greatly. In many conventional SPF animal room laboratories, the air-conditioning system is designed as a constant air volume system according to the larger load. When the load is significantly reduced, the excessively low indoor temperature is compensated by the method of secondary heating, thus wasting a lot of energy. If a variable air volume system is installed, the exhaust air problem must be considered, otherwise the changing air supply volume will inevitably cause the system air volume control to oscillate and destroy the normal pressure gradient.
1.spf level animal room laboratory temperature and humidity control
In the SPF animal room pharma machinery, the thermal insulation performance of the enclosure in the SPF area is excellent, and there is basically no load on the enclosure, so the SPF area needs to be cooled throughout the year. Each high-efficiency filter air supply outlet is provided with an electromechanical constant air volume valve and an end electric reheater at the upstream. Its function is to automatically adjust the air volume sent into the room according to the set temperature of the room. When the air supply volume is set to a smaller value (usually 10h-1 ventilation), the air supply volume is no longer reduced, and the terminal electric reheater is used to maintain a constant indoor temperature.
Because the indoor relative humidity control requirements are not high, the method of controlling the average value of each room can be adopted. In summer, the relative humidity of the supply air is controlled by changing the temperature and water volume of cold water, and in winter, steam humidification is used to solve the problem.
2.Spf level animal room laboratory air volume control
In order to reduce operating energy consumption as much as possible, when the number and species of animals raised in the room change, which causes changes in indoor load and when the outdoor fresh air can be fully utilized in transitional seasons, variable air volume operation is adopted. According to the requirements of SPF level, each room with air supply at the end must have a ventilation volume of 10~20h-1. Therefore, according to the load change, the adjustment of the air supply volume is limited to the range of 10~20h-1. On the other hand, because the resistance of the air supply port of the high-efficiency filter changes with the use time, it will affect the constant local air supply, so the electric air valve on the upstream branch pipe also has the function of mechanical automatic air volume determination. Two functions: 1) Compensate the air volume change caused by the high-efficiency filter to ensure that the dynamic air supply volume remains unchanged; 2) Balance the air volume change in the room caused by the change in the air supply volume of other rooms.
The whole air-conditioning system is designed as a variable air volume system, which adopts the method of constant static pressure and controls the total air volume of the system through frequency conversion and speed regulation.
It should be emphasized that the above two energy-saving operation links and differential pressure control act simultaneously. In fact, every time the air supply valve responsible for temperature control is activated, it will inevitably cause a change in the differential pressure. At this time, the air valve responsible for the differential pressure control will be linked, and the differential pressure link will be corrected to meet the set value requirements. Zhongjing Global Purification can provide consultation, planning, design, construction, installation,
Reconstruction and other supporting services.
Points to be paid attention to in the design of the energy-saving system of the spf-level animal room laboratory:
1) All kinds of accessories should be matched with the system, and the quality must be reliable. In particular, the pressure analog input should be strictly checked, and its deviation value must be within the allowable range. Since the controlled target value is generally only a few tens of Pa, sensors and other components with a large measurement range should not be selected. In addition, in order to maintain the accuracy of the measurement, the readings of a large number of analog sensors are compared with the measurement values u200bu200bof manual instruments in the laboratory project to verify.
2) The installation position of various sensing elements of BA must be suitable to avoid reading deviation due to improper position.
3) The selection of the electric adjustment mechanism should consider the characteristics of adapting to the micro-adjustment of the air valve, and it is not appropriate to use a short-stroke rapid adjustment mechanism.
4) The display software should be able to dynamically display various parameters such as pressure, temperature, valve opening and so on.
5) In the animal breeding room, it is recommended to set the maintenance steel walkway and basic lighting in the upper space to facilitate the daily maintenance of the actuator.
6) The designed system should be able to easily realize the pressure gradient without automatic control and have a good initial state. Only on the basis of a good initial state, it is possible to use BA for accurate numerical control.
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