Raising Efficiency of Precooling in a System of Connected Vapor Compression Refrigeration Machines

Лавренченко, Г. К.; Кравченко, М. Б.; Грудка, Б. Г.

doi:10.1007/s10556-020-00734-7

Cited by 1 publication

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“…Äля çб³лüшеííя õîлîäîпðîäóêòèâíîñò³ АКХМ âèêîðèñòîâóєòüñя õîлîä пðîäóêц³éíîгî ð³äêîгî àì³àêó, щî íàäõîäèòü íà âèðîбíèцòâî êàðбàì³äó. Їì пеðеîõîлîäжóєòüñя ð³äêèé àì³àê -ðîбî÷е ò³лî ìàшèíè -пеðеä éîгî äðîñелюâàííяì ó «âèпàðíèê NH3 -êîíäеíñàòîð СО2» [4,5]. Сõеìà óñòàíîâêè äàє ìîжлèâ³ñòü ³ç çàñòîñóâàííяì âèðîблеíîгî АКХМ õîлîäó çð³äжóâàòè пîпеðеäíüî êîìпðèìîâàíèé СО2 äля éîгî пîäàлüшîгî ñòèñ-Рèñ.…”

Section: коìпреñорно-наñоñна уñòановка для виробницòва р³дкого со2 òа подавання його на ñинòез карбаì³дуunclassified

Increasing the Efficiency of the Systems of Compressor-Pumping and Refrigeration Units Supplying Liquid Co2 and Nh3 to the Unit for Carbamide Synthesis

Лавренченко¹,

Грудка

2021

Energ. Tech. & Res. Sav.

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Carbon dioxide is used in large volumes to produce urea, a highly efficient nitrogen fertilizer. It is compressed in a multistage compressor to a pressure of 15 MPa and fed to the urea synthesis unit. The specific energy consumption for the compression of carbon dioxide by a compressor reaches 0.16 kWh/kg. It may be more profitable to use in the system of compressor-pumping and refrigeration units. They can be used to liquefy carbon dioxide and compress it to pressure 15 MPa before feeding it to the synthesis of urea. In the simplest scheme, an ammonia compression refrigeration machine (ACRM) is included in the system to improve efficiency. The specific energy consumption in such a system for the liquefaction and compression of CO2 is 0.118 kWh/kg. In case of replacement of the ACRM with an absorption refrigeration machine, unit costs can be reduced to 0.09 kWh/kg. These two systems can be used to increase urea production or to ensure stable operation of the units during the summer period of their operation. The analysis showed that further improvement of the technological scheme of the entire system will completely abandon the use of the compressor method of compression of CO2 to pressure 15 MPa before its supply to the urea synthesis unit. To do this, you need to include an additional absorption lithium bromide refrigeration machine in the system. In this scheme, the compressor-pumping unit will provide the simultaneous supply of liquid carbon dioxide and ammonia for the synthesis of urea with a pressure of 15 MPa. To increase the daily production of urea from 1400 to 2000 tons, it is necessary to increase the feed liquid CO2 in the amount of 62 t/hour and liquid NH3 — 47.5 t/hour. Bibl. 14, Fig. 3.

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Increasing the Efficiency of the Systems of Compressor-Pumping and Refrigeration Units Supplying Liquid Co2 and Nh3 to the Unit for Carbamide Synthesis

Лавренченко¹,

Грудка

2021

Energ. Tech. & Res. Sav.

View full text Add to dashboard Cite

show abstract

Raising Efficiency of Precooling in a System of Connected Vapor Compression Refrigeration Machines

Cited by 1 publication

References 3 publications

Increasing the Efficiency of the Systems of Compressor-Pumping and Refrigeration Units Supplying Liquid Co2 and Nh3 to the Unit for Carbamide Synthesis

Increasing the Efficiency of the Systems of Compressor-Pumping and Refrigeration Units Supplying Liquid Co2 and Nh3 to the Unit for Carbamide Synthesis

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