Absorption refrigerator relies on the role of the absorber-generator group to complete the refrigeration cycle refrigerator. It uses a binary solution as the work material, in which the low-boiling component is used as a refrigerant? , that is, using its evaporation to refrigeration. The following editor will introduce you to the Lithium Bromide Absorption Chiller working principle and advantages and disadvantages, please read below.
A lithium bromide absorption chiller principle
Lithium bromide absorption chiller is the use of lithium bromide at different temperatures in the aqueous solution of water vapor absorption and release to achieve refrigeration, this cycle to use external heat sources to achieve refrigeration, commonly used sources of heat for the steam, hot water, gas, fuel oil, etc.. Due to the lithium bromide absorption chiller has many unique advantages, the rapid development in recent years, especially in air conditioning refrigeration occupies a significant position. Then the application of lithium bromide absorption chiller is conducive to improving the utilization of primary energy, whether energy saving, in what case energy saving, hot and cold sources whether to choose the absorption chiller, has been the focus of debate. The application of lithium bromide absorption refrigerator in practice and its service life is directly related to the economic benefits of the actual project.
Lithium bromide to heat as a power source, water as a refrigerant, lithium bromide solution as an absorbent, to produce cold source water, known as lithium bromide refrigerator. Its heat source is mainly steam, hot water, gas and fuel oil, etc., can be divided into direct-fired, steam-type and hot water type. Steam-type units are mainly used in steam can be utilized in the occasion, such as urban centralized heating network, combined heat and power supply system, textile, chemical, metallurgical and other industries; hot water unit, can be used above 65 ℃ hot water, such as geothermal heat, solar thermal energy, industrial areas of the process generated by the residual heat from hot water to produce cold water. Direct-fired units can utilize gas to provide air conditioning for large buildings such as hotels, hospitals, office buildings and airports. Because it is cooling with heat, lithium bromide chillers can also utilize industrial waste heat to provide cold water or air conditioning for industry for process needs.
Lithium bromide absorber chillers are unique in the field of central air-conditioning with their ability to utilize low-taste heat energy, small electrical power requirement, water refrigerant and no damage to the environment from the lithium bromide solution, etc., and have been encouraged by the government and the electric power sector to satisfy the air-conditioning cooling needs during the period of severe power shortage in China. Since the late 1980s, China's lithium bromide air conditioning manufacturers have more than 100, the level of manufacturing and production of its products second only to Japan and ranked first in the world.
Second, the advantages and disadvantages of lithium bromide absorption refrigerator 1, the advantages of lithium bromide absorption refrigerator (1) powered by heat, do not need to consume a lot of electricity, and thermal energy requirements are not high. Can use a variety of low-potential heat and waste gas, waste heat, such as higher than 20kPa (o.2kgf/cm2) (gauge) saturated steam, a variety of exhaust; higher than 75 ° C hot water, as well as geothermal, solar energy, etc., is conducive to the comprehensive utilization of heat sources, so the operating costs are low. If the use of a variety of exhaust gas, waste heat to refrigeration, there is almost no need to spend running costs, you can get a large number of cold sources, has a very good power saving, energy saving effect, high economy. (2) The entire refrigeration device in addition to the power of a very small shielded pump, there are no other moving parts, small vibration, low noise, running relatively quiet, especially for hospitals, hotels, canteens, office buildings, theaters and other occasions. (3) lithium bromide solution as the work medium, the refrigerator is running in a vacuum, odorless, non-toxic, no danger of explosion, safe and reliable, known as pollution-free refrigeration equipment, is conducive to meeting the requirements of environmental protection. (4) wide range of cooling capacity adjustment. With the change of external load, the unit can steplessly adjust the cooling capacity within the range of 10% to 100%, and when adjusted for low load, the thermal efficiency hardly decreases, the performance is stable, and it can be well adapted to the requirements of variable load. (5) strong adaptability to changes in external conditions. Such as standard external conditions for steam pressure 5.88XlOSpa (6kgf/cm2) (gauge), cooling water inlet temperature of 32 ℃, refrigerant water outlet temperature of 10 ℃ of the steam double-effect machine, the actual operation shows that can be in the steam pressure (1.96 ~ 7.84) XlOSPa (2.0 ~ 8.okgf/emz) (gauge), the cooling water inlet temperature of 25 ~ 40 ℃. The refrigerant water outlet temperature 5-15 ℃ wide range of stable operation. (6) easy to install, low requirements for the installation foundation. No special machine base is required because of minimal vibration during operation. It can be installed in indoor, outdoor, ground floor, floor or roof. Installation only need to make a general leveling, connected to the gas, water piping and power can be. (7) Simple manufacture, easy operation, maintenance and repair. In addition to shielding pumps, vacuum pumps and vacuum valves and other ancillary equipment, almost all heat exchange equipment, manufacturing is relatively easy. Due to the stable performance of the unit, the adaptability to changes in external conditions, and thus the operation is relatively simple. The maintenance work of the unit mainly lies in maintaining the required airtightness.2, the main drawbacks of lithium bromide absorption refrigerator
(1) in the presence of air, lithium bromide solution has a strong corrosive effect on ordinary carbon steel. This not only affects the life of the unit, and affects the performance and normal operation of the unit. (2) The refrigeration machine operates under vacuum, and air is easy to leak. Practice has proved that even if the leakage of trace amounts of air, but also heavy damage to the performance of the unit. For this reason, the refrigeration machine requires strict sealing, which adds difficulties to the manufacturing and use of the unit. (3) As a result of the direct use of thermal energy, the unit's heat rejection load is larger, because the process of condensation and absorption of refrigerant vapors, all need to be cooled. In addition, the cooling water quality requirements are also higher, in places with poor water quality, the use of specialized water quality treatment should be carried out, otherwise it will affect the performance of the unit to play normally.Introduction of direct-fired lithium bromide chiller
Direct-fired lithium bromide absorption chiller is to use thermal energy as a power source, such as fuel oil, coal, natural gas and so on. Water as a refrigerant, from the lithium bromide solution as an absorbent, so as to produce 7 ℃ -12 ℃ chilled water for air conditioning end air conditioning. Direct-fired lithium bromide absorption chiller consists of a high generator, low generator, condenser, evaporator, absorber, solution pump, solvent pump and so on.
The above is the Lithium Bromide Absorption Chiller, I hope it can help you. For more information about lithium bromide absorption chiller, please continue to pay attention to Tuoba rabbit learning decoration.
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