Panasonic Sanyo Direct-fired Absorption Chiller
Classification application
Use natural gas, liquefied petroleum gas, city gas, coke oven gas, light diesel, etc. as heat sources to produce cold water above 5°C and hot water below 85°C for central air conditioning or industrial process systems to achieve cooling in summer and heating in winter. , Eliminating the need for heating boilers and large-capacity power distribution. Widely used in various fields of the national economy such as office buildings, hotels, hotels, shopping malls, theaters, stadiums, factories, oil fields, etc.
Capacity range: refrigeration: 63-11650KW; heating: 53-9800KW
Heat source conditions: natural gas, liquefied petroleum gas, city gas, light diesel coal bed methane, shale gas and other unconventional natural gas.
Salient features:
There are many types of energy utilization: clean energy natural gas, liquefied petroleum gas, city gas, light diesel coal bed methane, shale gas and other unconventional natural gas.
High efficiency and energy saving: Plate heat exchangers are used to strengthen heat exchange and improve thermal efficiency; multi-stage heat recovery to improve unit performance; built-in refrigerant adaptive device to achieve energy-saving operation; cooling water low-temperature and high-temperature operation design to achieve large-scale transformation Stable operation.
Safe and reliable: the accumulation of research, design, manufacturing, and quality technology. Multiple anti-crystallization safety control, through accurate calculation of solution concentration, fundamentally prevent the occurrence of crystallization.
Automation and networking: convenient accessory equipment control system, highly networked building automation and remote networked monitoring system.
Green and environmental protection: The use of environmentally friendly lithium molybdate corrosion inhibitor, palladium tube exhaust device to ensure vacuum, the equipment achieves seasonal air extraction.
Principle flow chart:
Cold room operation: The working principle is: the cold water in the evaporator is cooled by the low-temperature refrigerant water from the condenser after decompression and throttling. The refrigerant water itself absorbs the heat of the cold water and evaporates to become refrigerant vapor, which enters the absorber and is The concentrated solution is absorbed, and the concentrated solution becomes a dilute solution.
The dilute solution in the absorber is pumped to the refrigerant condensate heat recovery device, low-temperature heat exchanger, and high-temperature heat exchanger, and then the temperature rises, and finally enters the high-temperature regenerator, where the dilute solution is heated. Concentrate to an intermediate concentration solution. The intermediate concentration solution passes through the high temperature heat exchanger, enters the low temperature regenerator, is heated by the refrigerant steam generated in the high temperature regenerator, and becomes the final concentrated solution. The concentrated solution flows through the low-temperature heat exchanger, the temperature is lowered, and then enters the absorber. Dilin is on the cooling water pipe and absorbs the refrigerant vapor from the evaporator to become a dilute solution. On the other hand, in the high-temperature regenerator, the high-temperature flue gas generated by the combustion of the external fuel heats the lithium bromide solution and the water vapor generated enters the low-temperature regenerator, heats the intermediate concentration solution, and condenses itself into refrigerant water. The heat recovery device, the temperature is reduced, and the refrigerant vapor generated by the low-temperature regenerator enters the condenser to be cooled. After decompression and throttling, it becomes low-temperature refrigerant water, which enters the evaporator, and drops on the cold water pipe to cool down and enter the evaporator. Of cold water.
The above cycle is repeated so as to finally achieve the purpose of preparing low-temperature cold water.
Warm room operation: The dilute absorption liquid is heated and concentrated by the high-temperature regenerator to produce refrigerant vapor, which is directly sent to the evaporator and absorber. Heat exchange is carried out in the evaporator to prepare warm water. In addition, the absorption liquid that has been concentrated to an intermediate concentration enters the absorber, mixes with the refrigerant water and becomes a dilute absorption liquid, and then passes through the refrigerant condensate heat recovery device, low-temperature heat exchanger, and high-temperature heat exchanger to return to high temperature. Regenerator.
Through the above cycle, heating is achieved.
New structure, new technology
Five guarantee vacuum design
Optimize structural design and improve thermal efficiency
The use of patented new heat exchange tubes enhances the heat and mass transfer effect, and the comprehensive heat transfer coefficient is increased by 15%.
The heat exchanger adopts a new type of countercurrent cross-sweeping heat exchange, and the thermal efficiency is greatly improved.
The upper cylinder has a built-in vacuum insulation layer to reduce internal heat loss.
Built-in refrigerant adaptive cold storage device.
1. Load adaptation: Automatically supplement the refrigerant water in the evaporator according to the size of the load to ensure the stable performance of the unit.
2. "Cold storage": maximum energy-saving operation. The unit can automatically determine the size of the load at the user. When the load is small, the device automatically enters the "cold storage" state. When the load is large, it releases cold energy to reduce fuel consumption.
3. Shorten the start-up time of the unit to only 5-8 minutes.
4. Shorten the dilution operation time, only 6-12 minutes.
5. Adapt to lower cooling water inlet temperature (15℃)
6. Reduce the heat loss of the evaporator.
7. Effectively prevent the "cavitation" of the refrigerant pump and prolong the service life of the pump.
Adopt a number of new technologies to prevent refrigerant pollution
The cold state regeneration technology of the high temperature regenerator makes the solution easier to adjust, and it is not prone to refrigerant pollution.
New type double self-cleaning dripping device to prevent refrigerant pollution.
The double protection and purification guide device can effectively prevent refrigerant pollution and ensure the performance of the unit.
Fast start-up speed, short downtime, saving energy
Adopting built-in refrigerant adaptive cold storage device, new frequency conversion technology, cold regeneration technology of high temperature regenerator and stepless adjustment of fuel control valve, saving energy consumption during startup and shutdown, saving 40% during startup and 33% during shutdown .
Direct combustion bromine chiller cycle volume adjustment method
Direct combustion bromine chiller cycle volume adjustment method
There is no circulation control valve on the Ebara Red series direct combustion units, and it is necessary to adjust the solution circulation through frequency correction of the frequency converter.
The solution pump and solution spray pump of this series of units are equipped with separate frequency converters, and both high and low generators are equipped with liquid level electrodes. In summary, when the high generator is in the low liquid level range, the automatic control of the unit will increase the frequency of the solution pump. When the high generator is in the high liquid level range, the frequency of the solution pump will automatically decrease - the frequency will increase or decrease linearly until the liquid level is at the appropriate position, and the solution pump will maintain the current frequency to deliver the solution to the generator, achieving a stable state.
The liquid level control of the low engine is also a similar logic, except that the frequency of the solution spray pump is changed. Another difference is that when the liquid level of the low engine is low, the frequency of the spray pump decreases, while when the liquid level of the low engine is high, the frequency of the spray pump increases.
The logic may seem simple to describe, but there are many parameters that need to be set on the unit panel.
Firstly, whether it is a solution pump or a spray pump, there is a basic frequency, and the reference data for this basic frequency is the difference between the high generator pressure and the outlet pressure of the absorber. There are a total of 7 pressure ranges, namely 0, 16kpa, 31kpa, 46kpa, 61kpa, 76kpa, 91kpa, and 106kpa. There is a default value within each pressure range, which is the initial frequency of the frequency converter under the current working condition - these values can be modified according to the needs of the engineer. Secondly, in addition to the basic frequency, there is an important parameter called the correction amount, which is the frequency of each increase or decrease of the shielded pump when the liquid level is high or low. Generally speaking, at a low liquid level, increase by 2 hz each time until the liquid level is suitable; At a high liquid level, decrease by 1.5 hz each time until the liquid level is suitable. And this' every time 'refers to the correction interval, which is how many seconds the liquid level signal is detected. Both the correction interval and correction amount can be changed. It is worth mentioning that the correction amount has a range limit, and if it exceeds the range, an alarm will be given to indicate that the generator liquid level is not adjusted.
There are many parameters that affect the adjustment of the circulation volume, that is, the frequency adjustment of the frequency converter. The liquid level and pressure difference have been mentioned earlier, and in other settings, we can also choose whether to adjust the frequency of the frequency converter based on the high dew point temperature.
Although it is an independent variable frequency pump and two shielded pumps, the variable frequency of both pumps must be considered when adjusting the circulation volume. Because the Ebara Red series units have a series parallel process, this means that the function of the solution spray pump is to simultaneously transport high and low generation solutions to the absorber. That is to say, assuming that the liquid level of the low generator is high, the spray pump will increase frequency, which will lead to an increase in the circulation volume of the high generator solution and a decrease in the liquid level. Therefore, it is likely that the solution pump will also increase frequency at the same time.
Lithium bromide solution manufacturer
About us
Flier Refrigeration Engineering Technology Co., Ltd is a professional technical service enterprise integrating central air-conditioning host sales, spare parts sales, unit repair and maintenance.
Factory located in Zhenjiang, Jiangsu, covering an area of 25,000 square meters ,and has been built with 1 R&D center, 1 pilot plant, 3 An innovative production, learning, and research base composed of a professional production workshop and its corresponding infrastructure. At present, the company has become a well-known technical service provider in the field of central air conditioning in China.
The company’s main business scope includes: central air-conditioning maintenance, cleaning and technical services; cooling tower and fan coil cleaning and maintenance services; custom processing of lithium bromide solution; sales of lithium bromide solution special impurity separators; central air-conditioning host and various zero Sales of accessories; installation and sales of central air conditioning systems, etc.
Contact us
Ms. Lillian GUO
Zhenjiang FLIER Refrigeration Engineering Technology Co., Ltd
Jiangsu, China
Tel: + 86 15358588768(Whatsapp)
Wechat：15358588768
E-mail: mdguolijuan@zjflier.com
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