JPS5844183B2 - Single and double effect absorption chiller - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a single and dual effect absorption refrigerator,
The purpose is to effectively utilize thermal energy according to the heat source and load, and to perform stable switching operation.

In other words, one absorption chiller is operated as single-effect when using low-temperature heat sources such as solar hot water, low-temperature water, and waste heat, and as double-effect when using high-temperature heat sources such as city gas, kerosene, and high-temperature steam. The number is such that a combination of single effect and double effect operation can be carried out at will.

The present invention will be described below with reference to embodiments shown in the drawings.

1 is a direct-fired high-temperature generator that has a combustion heating chamber 2 for a high-temperature heat source such as city gas or kerosene, and exhaust heat pipes 3, 3, etc. of the heating chamber, and heats and separates a refrigerant from a dilute liquid; 4; 5 is a first low temperature generator that heats and separates the refrigerant from a dilute liquid using the refrigerant vapor sent from the high temperature generator 1 as a heat source; 5 is a cooler 6 that condenses the refrigerant flowing from both generators 1 and 4; a condenser for cooling, 7 an evaporator which obtains cold water for cooling from a water cooler 8 by utilizing latent heat when the liquid refrigerant from the condenser 5 is dispersed and vaporized; 9 a both generators 1; an absorber 10, which maintains the inside of the evaporator 7 at a low pressure and continuously supplies cold water by scattering the concentrated liquid from which the refrigerant is separated in step 4 and absorbing the refrigerant vapor in the container; 11 is a low temperature heat exchanger and a high temperature heat exchanger, these are refrigerant vapor pipe 1
2, a refrigerant circulation path 15 having a refrigerant liquid flow down pipe 13, a refrigerant pump 14, a dilute liquid pipe line 17 having an absorption liquid pump 16, a solution pipe line 18, a concentrated liquid pipe line 19, and, although not shown, a first A double-effect absorption refrigeration cycle is constructed by connecting the low temperature generator 4 to the low temperature heat exchanger 10 and the absorption liquid pipe line 19 between the high temperature heat exchanger 11 and concentrating pipe line 19 .

20 is a hot water heat exchanger provided between the high temperature generator 1 and the refrigerant vapor pipe 12.

Reference numeral 21 denotes a second low-temperature generator that is heated by a low-temperature heat source that is disposed opposite to the first low-temperature generator 4 with the condenser 5 at its center and provided upstream of the diluted liquid. The first low temperature generator 4 and the high temperature heat exchanger 11 are connected by the solution line 18.
The solution pipe line 18 is connected to the high temperature generator 1 through the respective opening/closing valves 22 and a solution pump 23 .

The upstream side of this solution pipe line 18 and the low temperature heat exchanger 10 are connected by a conduit 25 having an on-off valve 24.

Next, the operation will be explained.

(a)-Type dynamic operation In this case, the on-off valve 22 is closed, the on-off valve 24 is opened, and the solution pump 23 is stopped.

Then, by heating the second low temperature generator 21 with the low temperature heat source, the second low temperature generator 21. The condenser 5, the evaporator γ, the absorber 9, and the low-temperature heat exchanger 10 constitute an absorption refrigeration cycle, and cold water for cooling is supplied from the water cooler 8.

(b) Double effect operation In this case, the on-off valve 22 is open, the on-off valve 24 is closed, and the solution pump 23 is operated.

When the high-temperature generator 1 is heated by combustion of a high-temperature heat source such as city gas or kerosene, the diluted liquid from the absorber 9 passes through the replacement fluid pipe 11 to the second low-temperature generator 21 and is further transferred to the solution pipe 1.
8 to the high temperature generator 1 and the first low temperature generator 4, and the dilute liquid flowing into the first low temperature generator 4 becomes a solution regenerated by the generator, and this regenerated solution is passed through the absorption liquid pipe ( (not shown), and joins the concentrated liquid flowing from the high-temperature generator 1 via the high-temperature heat exchanger 11 through the concentrated liquid line 19 (in other words, the diluted liquid diverted to the high-temperature generator 1 is regenerated in the generator). This combined absorption liquid is returned to the absorber 9 via the low-temperature heat exchanger 10 through the concentrated liquid pipe 19, resulting in the above-mentioned double-effect absorption refrigeration cycle. The water cooler 8 supplies cold water for cooling, and the hot water heat exchanger 20 supplies hot water for temperature control.

In addition, when performing heating with hot water, on-off valves 26 and 27 provided in the refrigerant vapor pipe 12, solution pipe line 18, and concentrated liquid pipe line 19, respectively.
, 28 are closed to circulate refrigerant between the high temperature generator 1 and the hot water heat exchanger 20.

As described above, the present invention connects a high temperature generator, a first low temperature generator heated by refrigerant vapor from the generator, a condenser, an evaporator, an absorber, a low temperature heat exchanger, and a high temperature heat exchanger through piping. In a dual-effect absorption refrigerator, a second low-temperature generator heated by a low-temperature heat source is provided upstream of the diluted liquid with respect to the first low-temperature generator, and the bottom of the generator and the first low-temperature generator and a high temperature generator via a high temperature heat exchanger, connected to the high temperature generator by a conduit having an on-off valve and a solution pump, and connecting the conduit to the low temperature heat exchanger by a conduit having an on-off valve, the conduit Since the operation is selected by the operation of the on-off valve of the pipe, the on-off valve of the pipeline, and the solution pump,
One absorption refrigerating machine can be operated as single effect or double effect depending on the heat source, and switching between them is also simple, making effective use of energy and economical operation possible.

[Brief explanation of the drawing]

The drawing is a block diagram of a single and dual effect absorption refrigerator according to the present invention. 1... High temperature generator, 4... First low temperature generator, 10... Low temperature heat exchanger, 11...
・High temperature heat exchanger, 21...Second low temperature generator, 2
2...Opening/closing valve, 23...Solution pump,
18...Pipe line, 24...Opening/closing valve, 25
······conduit.

Claims (1)

[Claims] 1. Dual effect, consisting of a high temperature generator, a first low temperature generator heated by refrigerant vapor from the generator, a condenser, an evaporator, an absorber, a low temperature heat exchanger, and a high temperature heat exchanger connected by piping. In the absorption refrigerator, a second low temperature generator heated by a low temperature heat source is provided upstream of the diluted liquid with respect to the first low temperature generator, and a bottom of the generator, the first low temperature generator and the high temperature heat exchanger are connected to each other. A conduit having an on-off valve and a solution pump is connected to the high-temperature generator via the conduit, and the low-temperature heat exchanger is connected to the high-temperature generator through a conduit having an on-off valve, and the on-off valve of the conduit and the pipe A single/double effect absorption refrigerating machine, characterized in that an arbitrary operation can be selected by operating a channel opening/closing valve and a solution pump.