Liquid ammonia, sodium nitrate and lithium bromide absorption refrigeration system

Patent metadata

Field	Value
Publication number	US-11609028-B2
Application number	US-202117320473-A
Country	US
Kind code	B2
Filing date	May 14, 2021
Priority date	Aug 21, 2020
Publication date	Mar 21, 2023
Grant date	Mar 21, 2023

Abstract

Disclosed is a refrigeration system, including: a generator having a liquid storage cavity for containing a liquid ammonia and sodium nitrate solution, a heat source being connected to the generator and an exhaust pipe being arranged at the upper end of the generator; a condenser having a condensation cavity, an inlet of the condensation cavity being communicated with the exhaust pipe; an evaporator having an evaporation cavity for containing hydrogen, an inlet of the evaporation cavity being communicated with an outlet of the condensation cavity through a liquid inlet pipe; an absorber located below the evaporation and having an absorption cavity for containing a sodium nitrate solution, an upper part of the absorption cavity being communicated with an outlet of the evaporation cavity through a mixed gas pipe, and the absorber being provided with a reflux pipeline which communicates the absorption cavity and the liquid storage cavity.

First claim

I claim:

1. A refrigeration system, comprising:
a generator having a liquid storage cavity for containing a liquid ammonia and sodium nitrate solution, wherein a heat source is connected to the generator, and an exhaust pipe is arranged at the upper end of the generator;
a condenser having a condensation cavity, wherein an inlet of the condensation cavity is communicated with the exhaust pipe;
an evaporator having an evaporation cavity for containing hydrogen, wherein an inlet of the evaporation cavity is communicated with an outlet of the condensation cavity through a liquid inlet pipe;
an absorber located below the evaporation and having an absorption cavity for containing a sodium nitrate solution, wherein an upper end of the absorption cavity is communicated with an outlet of the evaporation cavity through a mixed gas pipe, and the absorber is provided with a reflux pipeline which communicates the absorption cavity and the liquid storage cavity; and
a lithium bromide-water refrigerating machine, wherein a first cold water pipe and a second cold water pipe are arranged at a cold water output end of the lithium bromide-water refrigerating machine, the first cold water pipe being connected to the condenser to cool a gas in the condensation cavity, and the second cold water pipe being connected to the absorber to cool the sodium nitrate solution in the absorption cavity;
wherein the absorber is provided with a gas return pipe that communicates an upper part of the absorption cavity and the evaporation cavity, and the exhaust pipe is provided with a bypass pipe that is communicated with the gas return pipe.

2. The refrigeration system of claim 1 , wherein the heat source is a hot water pipeline has a temperature of 110° C. or higher.

3. The refrigeration system of claim 1 , wherein the condenser is provided with an inclined gas inlet pipe, a low end of the gas inlet pipe being connected to the exhaust pipe, and a high end of the gas inlet pipe being located inside the condensation cavity.

4. The refrigeration system of claim 3 , wherein the first cold water pipe is provided with a coil in the condensation cavity.

5. The refrigeration system of claim 1 , wherein the bypass pipe has an S-shaped pipe section, and a high end of the S-shaped pipe section is connected to the gas return pipe.

6. The refrigeration system of claim 5 , wherein an upper end of the gas return pipe is an inclined pipe that is arranged obliquely, and a high end of the inclined pipe is connected to the evaporation cavity.

7. The refrigeration system of claim 6 , wherein a low end of the inclined pipe has a bent section.

8. The refrigeration system of claim 1 , wherein the reflux pipeline is inclined, and a low end of the reflux pipeline is connected to the liquid storage cavity.

9. The refrigeration system of claim 1 , wherein the lithium bromide-water refrigerating machine comprises a second generator, which is connected to the heat source to realize heating.

10. The refrigeration system of claim 9 , wherein cold water output from the lithium bromide-water refrigerating machine has a temperature of 7° C. to 9° C.

Assignees

• Univ Wuyi

Inventors

• Wu Min

Classifications

• F25B33/00

  Boilers; Analysers; Rectifiers (boiler-absorbers F25B35/00) · CPC title

• F25B15/04 Primary

  the refrigerant being ammonia evaporated from aqueous solution {(F25B15/025 takes precedence)} · CPC title

• F25B15/02

  without inert gas ({F25B15/004, F25B15/006, F25B15/008}, F25B15/12, F25B15/14, F25B15/16 take precedence) · CPC title

• C09K5/047

  for absorption-type refrigeration systems · CPC title

• C09K5/10 Primary

  Liquid materials · CPC title