MODELING OF THERMAL MODES OF THE REFLUX CONDENSER OF THE ABSORPTION REFRIGERATION UNIT

Andrey Kholodkov, Aleksandr Titlov

Abstract


Currently, developers of modern refrigeration equipment, in accordance with the plans of the UN, are moving to natural refrigerants (hydrocarbons, carbon dioxide and ammonia) that do not have an adverse technological impact on the ecosystem of the planet. In domestic refrigeration technology, one of the options is absorption refrigeration units, the working body of which is an aqueous ammonia mixture with the hydrogen addition. Having a number of unique advantages over compression analogs, absorption systems are characterized by lower energy characteristics.

As the analysis shows, the maximum thermodynamic losses in the absorption aggregates are concentrated in the generating unit when the ammonia is evaporated, it is purified from water vapor and transported to the evaporator. In this connection, the mathematical modeling of the thermal regimes of the reflux condenser is performed, which is responsible for purification and transportation of ammonia vapor.

Modeling is carried out on standard designs of absorption refrigeration units taking into account reasonable assumptions and results of own experimental researches. A cellular model is used. Stationary operating modes are modeled due to the high thermal inertia of the processes in the reflux condenser.

As a result, the perspective of the thermal insulation installation throughout the reflux section is shown, which makes it possible to increase the energy efficiency by 17 ... 22 %

Keywords


thermal modes; energy efficiency; absorption refrigerator; reflux condenser; thermal insulation

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References


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DOI: http://dx.doi.org/10.21303/2461-4262.2017.00358

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Copyright (c) 2017 Andrey Kholodkov, Aleksandr Titlov

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ISSN 2461-4262 (Online), ISSN 2461-4254 (Print)