JP4035899B2 - Gas cooler - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas cooler.
[0002]
[Prior art]
The gas cooler of the turbo compressor cools the gas whose temperature has been increased by being compressed by the turbo compressor, and is connected to the downstream side of the turbo compressor.
[0003]
As shown in FIG. 8, the gas cooler 30 is provided with a gas inlet 32 at one end of a cylinder 31, a gas outlet 33 at the other end, and a coolant inlet 34 and outlet 35 at one end of the cylinder 31. And a large number of heat transfer tubes 36 are provided in the body 31 by connecting the inlet 34 and the outlet 35 thereof, and the heat transfer tubes 36 are provided with a number of fins 37.
[0004]
Further, a baffle plate that divides the flow path in the cylinder 31 so that the gas entering the cylinder 31 from the gas inlet 32 flows perpendicularly to the heat transfer tube 36 and is led back to the gas outlet 33 by being bent a plurality of times. 38 and 39 are provided.
[0005]
[Problems to be solved by the invention]
By the way, in the case of a turbo compressor in which the turbo compressor 40 and the gas cooler 30 as shown in FIG. 8 are connected in multiple stages so as to increase the compression rate, gas outlets 33 formed at both ends of the cylinder 31 due to layout restrictions. And the entrance 32 is changed for each stage.
[0006]
At this time, the gas cooler 30 with the gas outlet 33 at the end on the cooling water inlet 34 side can efficiently cool the gas, and the gas outlet 33 is at the end on the opposite side to the cooling water inlet 34 side, so The gas cooler 41 from the gas flow path to the gas outlet 33 can cool the gas as efficiently as the gas cooler 30 in which the gas outlet 33 is located at the cooling water inlet 34 position even if the same fin area and the same cooling water flow rate are used. There is a problem that you can not.
[0007]
Accordingly, an object of the present invention is to provide a gas cooler that can solve the above-mentioned problems and can cool the gas satisfactorily even if the heat transfer tube goes around the gas flow path and reaches the gas outlet.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a gas inlet at one end of a cylinder, a gas outlet at the other end, and an inlet and outlet for cooling liquid at one end of the cylinder. In the gas cooler in which a large number of heat transfer tubes are provided in the cylinder, a plurality of baffle plates are provided in the cylinder, and the gas from the gas inlet to the gas outlet is orthogonal to the heat transfer tube. A folded flow path is formed so as to be folded, and a large number of fins are provided in the cooling liquid outlet side heat transfer tubes of the respective folded flow paths and the cooling liquid inlet side heat transfer tubes of the gas outlet side folded flow paths to cool the gas inlet side folded flow paths. The fin is not attached to the liquid inlet side heat transfer tube.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0010]
As shown in FIGS. 1, 2, 3, and 4, the gas cooler 1 includes a body 2, a number of heat transfer tubes 3 provided in the body 2, and a number of fins 4 provided in the heat transfer tubes 3. Consists of.
[0011]
The body 2 has a gas inlet 5 on one side surface (one end) and a gas outlet 6 on the other side surface (other end).
[0012]
In addition, an inlet 7 and an outlet 8 of cooling water, which is a coolant flowing through the heat transfer tube 3, are formed on one end face (hereinafter referred to as one end face) of the body 2. Specifically, the coolant outlet 8 is disposed at a position close to the gas inlet 5, and the coolant inlet 7 is disposed on the gas flow downstream side of the coolant outlet 8.
[0013]
The coolant inlet 7 and the outlet 8 are formed adjacent to each other on one end face, and as shown in FIG. 5, at one end of the body 2, an inlet for temporarily storing the coolant flowing in from the coolant inlet 7. A side head 9 is provided, and an outlet side head 10 for temporarily storing a coolant that flows through the heat transfer tube 3 and flows out of the gas cooler 1 is provided.
[0014]
Each heat transfer tube 3 is made of a copper tube and is formed in a substantially U shape. Each heat transfer tube 3 has one end connected to the inlet side head 9 and the other end connected to the outlet side head 10. The coolant flowing into the inlet side head 9 is branched into a large number of heat transfer tubes 3. Then, it flows into the outlet-side head 10 and joins.
[0015]
In particular, the heat transfer tube 3 is provided up to the vicinity of the gas inlet 5 and the gas outlet 6 and cools the fins 4 extended to the vicinity of gas inlets 5 and 6 described later.
[0016]
A baffle flow path is defined in the cylinder 2 so that the gas from the gas inlet 5 to the gas outlet 6 is folded after being orthogonal to the heat transfer tube 3, and baffles 11 and 12 for increasing the gas flow rate. Are provided.
[0017]
Specifically, the baffle plates 11 and 12 include a first baffle plate 11 extending perpendicularly to the heat transfer tube 3 from the center side of the body 2 of the gas inlet 5, and the heat transfer tube 3 from the center side of the body 2 of the gas outlet 6. The second baffle plate 12 extends perpendicularly to the second baffle plate 12. The first baffle plate 11 and the second baffle plate 12 extend in directions opposite to each other, and folding portions 13 and 14 for flowing gas are formed between the front ends of the baffle plates 11 and 12 and the inner surface of the body 2.
[0018]
Then, a gas inlet-side folded flow path 15 that enters the barrel 2 through the gas inlet 5 and is orthogonal to the heat transfer tube 3, a central folded flow path 16 that is folded with the first baffle plate 11 interposed therebetween, and a second baffle A folded channel 18 including a gas outlet side folded channel 17 that is folded again and is connected to the gas outlet 6 with the plate 12 interposed therebetween is formed.
[0019]
The fin 4 includes a linear coolant outlet side (return path side) heat transfer tube 19 connected to the coolant outlet 8 and a linear coolant inlet side (outward side) heat transfer tube 20 connected to the coolant inlet 7. Among them, a large number of them are provided only at the outlet crossing portion 21 that crosses the gas outlet side folded flow path 17, and are not provided at the coolant inlet 7 side of the outlet crossing portion 21.
[0020]
Further, the fin 4 is formed to be larger than the fin 4 of the folded portions 13 and 14 of the folded flow path 18 so as to extend to the vicinity of the gas inlet 5 in the gas inlet-side folded flow path 15. The passage 17 is formed larger than the fins 4 of the folded portions 13 and 14 so as to extend to the vicinity of the gas outlet 6. And the fin area is made equal to the case where the fin 4 is provided on the coolant inlet 7 side of the outlet crossing portion 21 of the heat transfer tube 3.
[0021]
The fins 4 are caulked and fixed to the outer periphery of the heat transfer tube 3 at substantially equal intervals.
[0022]
Next, the operation will be described.
[0023]
When a coolant is supplied from the coolant inlet 7 and a gas to be cooled is supplied from the gas inlet 5, the coolant flows into the inlet head 9 and branches from the inlet head 9 into the heat transfer tubes 3 to flow. . Then, the coolant flows through the coolant inlet side heat transfer tube 20, crosses the gas inlet side return channel 15 and the center return channel 16, and flows to the outlet crossing portion 21 of the gas outlet side return channel 17.
[0024]
At this time, since the fin 4 is not provided in the coolant inlet side heat transfer tube 20 up to the outlet crossing portion 21 of the gas outlet side folded channel 17, the gas inlet side folded channel 15 and the central folded channel 16 No heat exchange is performed, and the coolant reaches the outlet crossing portion 21 in a state of being cooled, and heat exchange with the gas starts at the fins 4 provided on the outlet crossing portion 21.
[0025]
Then, the coolant flows into the coolant outlet side heat transfer tube 19 and flows into the outlet side head 10 across the gas outlet side folded channel 17, the central folded channel 16, and the gas inlet side folded channel 15 in this order. Merged.
[0026]
The gas flows into the body 2 from the gas inlet 5 and flows through the gas inlet-side folded flow path 15 so as to be orthogonal to the heat transfer tube 3. At this time, the coolant flowing in the coolant outlet side heat transfer pipe 19 near the gas inlet 5 is a relatively warm coolant near the coolant outlet, but the fin 4 extends to the vicinity of the gas inlet 5 and is large, and The heat exchange gas is also the most upstream gas having the highest temperature in the cylinder 2, so that the heat exchange is performed well.
[0027]
Then, it intersects with the coolant inlet side heat transfer tube 20 and turns back, flows into the center return passage 16 and again intersects with the coolant inlet side heat transfer tube 20. At this time, the fin 4 is not provided in the cooling liquid inlet side heat transfer tube 20, and the surface area of the cooling liquid inlet side heat transfer tube 20 is slightly smaller than the surface area of the fin 4. The heat exchange is hardly performed and the coolant is not warmed.
[0028]
Thereafter, the gas crosses over the coolant outlet side heat transfer tube 19 and turns back, flows into the gas outlet side return flow passage 17 and crosses the coolant outlet side heat transfer tube 19 again. At this time, the cooling liquid outlet side heat transfer tubes 19 are provided with fins 4, and the gas is cooled by exchanging heat with the cooling liquid outlet side heat transfer tubes 19 in the central return flow path 16, and then turned back on the gas outlet side. Heat is exchanged with the coolant outlet side heat transfer tube 19 in the flow path 17 for further cooling. Since the gas exchanges heat downstream of the coolant and then moves upstream to exchange heat, the gas is efficiently and well exchanged.
[0029]
Then, the gas flows toward the gas outlet 6, crosses the coolant inlet side heat transfer tube 20, and flows out from the gas outlet 6 after the final heat exchange. At this time, the coolant in the coolant inlet side heat transfer tube 20 has a low temperature that is almost the same as that when it flows in from the coolant inlet 7, so that the temperature difference between the gas and the coolant is large, and the fin 4 Is formed larger than the folded portions 13 and 14, the gas is cooled to near the coolant temperature at the time of inflow.
[0030]
As described above, the cooling liquid outlet side heat transfer tube 19 and the cooling liquid inlet side heat transfer tube 20 of the gas outlet side folded flow channel 17 are provided with a large number of fins 4, and the cooling liquid inlet side heat transfer tube 20 of the gas inlet side folded flow channel 15 is provided. Since the fin 4 is not attached to the gas outlet 6, it is possible to allow a cold coolant to flow through the gas outlet 6. By increasing the temperature difference between the gas and the coolant at the gas outlet 6, as shown in FIG. Can be efficiently and satisfactorily cooled.
[0031]
The heat transfer tube 3 is not limited to a U-shape, and may be linear as shown in FIG. In this case, a water chamber 22 is formed on the other end of the body 2, a heat transfer tube is connected to the head 9 on the inlet side and the water chamber 22, a forward heat transfer tube (coolant inlet side heat transfer tube) 23, It is good to consist of the return side heat exchanger tube (coolant outlet side heat exchanger tube) 24 which connects the outlet side head 10.
[0032]
【The invention's effect】
In short, according to the present invention, it is possible to cool the gas satisfactorily even if the heat transfer tube goes around the gas flow path and reaches the gas outlet.
[Brief description of the drawings]
FIG. 1 is a plan view of a gas cooler showing a preferred embodiment of the present invention.
2 is a view taken along the line II-II in FIG.
FIG. 3 is a side view of FIG. 1;
4 is a view taken in the direction of arrows IV-IV in FIG. 1;
FIG. 5 is a schematic illustration of the use of a gas cooler.
FIG. 6 is a graph showing a performance comparison of gas coolers.
FIG. 7 is a plan view of a gas cooler according to another embodiment.
FIG. 8 is a schematic explanatory diagram showing a usage state of a conventional gas cooler.
[Explanation of symbols]
1 Gas cooler 2 Body 3 Heat transfer tube 4 Fin 5 Gas inlet 6 Gas outlet 7 Coolant inlet 8 Coolant outlet 11 Baffle plate 12 Baffle plate 15 Gas inlet side folded flow path 17 Gas outlet side folded flow path 18 Folded flow path 19 Cooling liquid Outlet side heat transfer tube 20 Coolant inlet side heat transfer tube

Claims (1)

A gas inlet is provided at one end of the cylinder, a gas outlet is provided at the other end, a cooling liquid inlet and outlet are provided at one end of the cylinder, and a number of heat transfer tubes are connected to the cylinder by connecting the inlet and the outlet. In the gas cooler, a plurality of baffle plates are provided in the cylinder, and a folding flow path is formed so that the gas from the gas inlet to the gas outlet is folded after being orthogonal to the heat transfer tube. Provide a large number of fins on the coolant outlet side heat transfer tube of the return channel and the coolant inlet side heat transfer tube of the gas outlet side return channel, and do not attach the fins to the coolant inlet side heat transfer tube of the gas inlet side return channel A gas cooler characterized by that.

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