阅读说明：本技术 间壁式换热器 (Dividing wall type heat exchanger ) 是由 王凯建 高桥俊彦 小泉晓 于 2019-01-24 设计创作，主要内容包括：本发明的间壁式换热器包括：第一间壁(45)；第二间壁(61)；以及多个第一流路壁(48-1～48-n),其将形成于第一间壁(45)与第二间壁(61)之间的空间划分为多个第一流路(65)。此时,第一间壁(45)和第二间壁(61)将多个第一流路(65)与供第二流体流过的多个第二流路(66)分隔开,该第二流体与流过多个第一流路(65)的第一流体不同。多个第一流路壁(48-1～48-n)形成有分别沿多个正弦曲线的多个第一侧流路壁面(52)和多个第二侧流路壁面(53)。(The dividing wall type heat exchanger of the invention comprises: a first partition wall (45); a second partition wall (61); and a plurality of first channel walls (48-1-48-n) that divide a space formed between the first partition wall (45) and the second partition wall (61) into a plurality of first channels (65). At this time, the first partition wall (45) and the second partition wall (61) separate a plurality of first flow paths (65) from a plurality of second flow paths (66) through which a second fluid different from the first fluid flowing through the plurality of first flow paths (65) flows. The plurality of first channel walls (48-1 to 48-n) are formed with a plurality of first side channel wall surfaces (52) and a plurality of second side channel wall surfaces (53) that respectively follow a plurality of sinusoidal curves.)

1. A dividing wall heat exchanger, comprising:

a first partition wall;

a second partition wall; and

a plurality of flow path walls that divide a space formed between the first partition wall and the second partition wall into a plurality of first flow paths, wherein,

the first partition and the second partition separating the plurality of first flow paths from a second flow path through which a second fluid flows, the second fluid being different from the first fluid flowing through the plurality of first flow paths,

the plurality of flow path walls are formed with a plurality of wall surfaces,

each of the plurality of walls follows a sinusoidal curve different from each other.

2. The dividing wall heat exchanger of claim 1, wherein:

each of the plurality of flow path walls is formed with:

a first wall surface; and

a second wall surface formed on the opposite side of the first wall surface,

the sinusoids include a first sinusoid and a second sinusoid,

said first wall being along said first sinusoid and said second wall being along said second sinusoid,

the period and amplitude of the first sinusoid is the same as the period and amplitude of the second sinusoid,

the first sinusoidal curve and the second sinusoidal curve are located at positions which are parallel-shifted in the direction of each amplitude by a preset offset value.

3. The dividing wall heat exchanger of claim 1, wherein:

each of the plurality of flow path walls is formed with:

a first wall surface; and

a second wall surface formed on the opposite side of the first wall surface,

the sinusoids include a first sinusoid and a second sinusoid,

the first wall surface follows a first sinusoidal curve, the second wall surface follows a second sinusoidal curve,

the period of the first sinusoid is the same as the period of the second sinusoid,

the amplitude of the first sinusoid is less than the amplitude of the second sinusoid,

the first sinusoid intersects the second sinusoid at respective inflection points.

4. A dividing wall heat exchanger as claimed in claim 1 or 3, wherein:

each of the plurality of flow path walls is divided into a plurality of flow path wall elements by forming a notch portion in a cycle of the sinusoidal curve,

the notch portion coincides with an inflection point of the sinusoidal curve,

the flow path wall element coincides with a maximum point or a minimum point of the sinusoidal curve.

5. The dividing wall heat exchanger of claim 4, wherein:

the flow path wall element is formed by: the width of the notch portion gradually decreases as the end portion adjacent to the notch portion approaches.

6. The dividing wall heat exchanger of claim 4 or 5, wherein:

the flow path wall element is further divided by forming an element internal notch part,

the element inner notch portion overlaps with another inflection point different from the inflection point overlapping with the notch portion in the sinusoidal curve.

7. The dividing wall heat exchanger of claim 6, wherein:

the flow path wall element has an intermediate flow path wall element disposed in the cutout portion in the element.

8. A dividing wall heat exchanger as defined in any one of claims 1 to 7, further comprising:

a side wall forming a side wall surface at an end of the space,

the sidewall surface follows other sinusoids having the same period as the sinusoids.

9. A dividing wall heat exchanger as defined in any one of claims 1-8, wherein:

a value obtained by dividing a minimum value of the intervals of the plurality of flow path walls by the interval of the first partition and the second partition is greater than 2.5 and less than 6.

Technical Field

The present technology relates to dividing wall type heat exchangers.

Background

Known as a dividing wall heat exchanger, heat is exchanged between fluids separated by dividing walls. In such a dividing wall type heat exchanger, the heat transfer area required for heat exchange of each fluid is determined in consideration of the thermal conductivity balance condition, and the heat exchanger can be made compact (see patent document 1).

Patent document 1: japanese patent laid-open publication No. 2009-68736

Disclosure of Invention

On the other hand, in the conventional dividing wall type heat exchanger, a heat transfer surface shape capable of improving the heat transfer performance of the heat exchanger is developed by trial and error. Therefore, the dividing wall type heat exchanger has a problem that the shape of the heat transfer surface is difficult to optimize.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a dividing wall type heat exchanger having a heat transfer surface with a shape that can improve heat transfer performance while achieving a compact heat exchanger. .

In the disclosed technology, a dividing wall type heat exchanger includes: a first partition wall; a second partition wall; and

a plurality of flow path walls that divide a space formed between the first partition and the second partition into a plurality of first flow paths. The first partition and the second partition separate the plurality of first flow paths from a second flow path through which a second fluid flows, the second fluid being different from the first fluid flowing through the plurality of first flow paths. The plurality of flow path walls are formed with wall surfaces along a sinusoidal curve.

The dividing wall type heat exchanger can realize the compactness of the heat exchanger and can improve the heat transfer performance of the heat exchanger.

Drawings

Fig. 1 is a perspective view showing a dividing wall type heat exchanger according to embodiment 1.

Fig. 2 is an exploded perspective view showing the heat exchanger main body.

Fig. 3 is a plan view showing one of the plurality of first heat exchanger plates.

Fig. 4 is a plan view showing one of the plurality of second heat exchanger plates.

Fig. 5 is a plan view showing the first heat exchange flow path concave portion.

Fig. 6 is a plan view showing two adjacent flow path walls among the plurality of first flow path walls.

Fig. 7 is an enlarged view showing a-a section of fig. 2.

Fig. 8 is a plan view showing a plurality of odd-numbered flow path walls and a plurality of even-numbered flow path walls formed in the dividing wall type heat exchanger of example 2.

Fig. 9 is an explanatory view schematically showing a plurality of odd-numbered flow path walls and a plurality of even-numbered flow path walls formed in the dividing wall type heat exchanger of example 2.

Fig. 10 is a plan view showing odd-numbered flow path wall elements.

Fig. 11 is a plan view showing a plurality of odd-numbered flow path walls formed in the dividing wall type heat exchanger of example 3.

Fig. 12 is an explanatory view schematically showing a plurality of odd-numbered flow path walls and a plurality of even-numbered flow path walls formed in the dividing wall type heat exchanger of example 3.

Fig. 13 is a plan view showing odd-numbered flow path wall elements.

Fig. 14 is a plan view showing one odd-numbered passage wall element among the plurality of odd-numbered passage wall elements formed in the dividing wall heat exchanger of example 4.

Fig. 15 is a graph showing the heat transfer coefficient K and the product KA of the heat transfer coefficient K and the heat transfer area of the dividing wall type heat exchanger of example 4 and the dividing wall type heat exchanger of the comparative example.

Fig. 16 is a graph showing the pressure loss of the dividing wall type heat exchanger of example 4 and the pressure loss of the dividing wall type heat exchanger of the comparative example.

Fig. 17 is a plan view showing a part of one flow path wall provided in the dividing wall type heat exchanger according to the modification.

Detailed Description

The following describes a dividing wall type heat exchanger according to the embodiment disclosed in the present invention with reference to the drawings. The technique disclosed in the present invention is not limited to the following description. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted.