Ammonia water absorption refrigeration system and its concentration active control method
An absorption refrigeration and concentration technology, which is applied in the direction of refrigerators, refrigeration components, adsorption machines, etc., can solve the problems of not being able to make full use of the decrease in ambient temperature, and achieve the effect of avoiding adverse effects
Active Publication Date: 2015-10-28
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
The concentration of working medium in the existing unit is constant, and the benefits brought by the reduction of ambient temperature cannot be fully utilized, so that the unit cannot operate in the optimal state at this ambient temperature
Method used
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[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0035] Such as figure 1 as shown, figure 1 It is a schematic diagram of an ammonia water absorption refrigeration system with adjustable working medium concentration according to an embodiment of the present invention. Among them, S1 to S17 represent circulating working fluids. The system includes: solution pump 1, solution heat exchanger 2, rectification tower 3, condenser 4, liquid ammonia splitter 5, subcooler 6, ammonia throttle valve 7, evaporator 8, absorber 9, concentrated solution storage tank 10 , dilute solution splitter 11 , dilute solution throttle valve 12 , liquid ammonia storage tank 13 , liquid ammonia flow valve 14 , air release valve 15 , dilute solution storage tank 16 and dilute solution flow valve 1...
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The invention discloses an ammonium hydroxide absorption refrigerating system and an active regulating and controlling method of concentration of the ammonium hydroxide absorption refrigerating system, and relates to the technical field of medium-and-low temperature excess heat or solar energy utilization. The system comprises a solution pump, a solution heat exchanger, a rectifying tower, a condenser, a liquid ammonia shunt, a subcooler, an ammonia throttling valve, an evaporator, an absorber, a concentrated solution storage tank, a weak solution shunt, a weak solution throttling valve, a liquid ammonia storage tank, a liquid ammonia flow valve, a deflation valve, a weak solution storage tank and a weak solution flow valve, switches of the shunts and the flow valves are controlled by monitoring pressure of the absorber and temperature of cooling media so that concentration of concentrated solution in a unit can be actively regulated and controlled, the concentration can be changed along with changes of the temperature of the cooling media, and performance of the system is improved. According to the system and the method, the unit can operate under the best operating condition all year around, and the energy saving rate can reach 6.6% per year.
Description
technical field [0001] The invention relates to the technical field of absorption refrigeration, in particular to an ammonia water absorption refrigeration system with adjustable working medium concentration and a method for actively regulating the concentration thereof. Background technique [0002] Ammonia water absorption refrigeration technology is a refrigeration technology that can be driven by low-temperature waste heat resources or low-temperature renewable energy such as solar energy and geothermal energy. in other chemical processes. The low-temperature waste heat drives the generation process and the rectification process to separate the concentrated solution into high-purity ammonia vapor and low-concentration dilute ammonia solution. The ammonia vapor is condensed into liquid ammonia in the condenser, and the liquid ammonia is subcooled and throttled. It enters the evaporator for evaporation and refrigeration, and the evaporated ammonia vapor enters the absorbe...
Claims
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IPC IPC(8): F25B15/04F25B27/00F25B49/04
CPCY02A30/27Y02B30/62
Inventor 金红光韩巍孙流莉郑丹星林汝谋杨金福崔平
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI