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Estimated calculation of thermoskicheskiy indicators of reservoir for liquid fertilizer storage

Journal: Bulletin of Prydniprovs'ka State Academy of Civil Engineering and Architecture (Vol.2019, No. 6)

Publication Date:

Authors : ;

Page : 47-53

Keywords : reservoirs; liquid mineral fertilizers; heat engineering indicators; insulation;

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Analysis of the market of agricultural products shows that the increase in prices for agricultural products leads to an increase in the profitability of agricultural producers. For greater efficiency of agriculture, progressive methods of land cultivation, innovative technologies, the latest technology, fertilizers and plant protection products are used. In this regard, recently there has been increased interest on the part of agricultural producers to the use of liquid mineral fertilizers, in particular urea-ammonia mixtures. In Soviet times in Ukraine, almost every district had a warehouse of liquid mineral fertilizers. The advantages of liquid fertilizers are obvious: they are technological and have a higher percentage of digestibility compared to dry fertilizers, the cost of storage is two times less than solid nitrogen fertilizers, compared to anhydrous ammonia − seven times, and therefore more return on the money spent. The purpose of article for a given thickness of the insulation (polyurethane foam, foam) to determine the total thermal resistance RΣпр tanks intended for storage of liquid fertilizers, the temperature of its inner surface τb and specific heat flux q in winter in accordance with the requirements of state standards and sanitary regulations. Method. Analysis of the calculations of thermal performance tanks for liquid fertilizers and statistical processing of the results (with visualization) was carried out using the software package EXCEL. Results. On the basis of theoretical researches dependences of change of temperature of an internal surface of tanks are received and the estimated calculations allowing to predict temperature of liquid mineral fertilizers in a cold period of year are executed. Conclusion. The optimal thickness of the insulation for both polyurethane foam and foam is 0,15 m. Further quantitative increase in the thickness of the insulation does not give a qualitative increase in the temperature of liquid mineral fertilizers.

Last modified: 2020-01-23 20:22:24