Heat exchanger and absorption refrigerator
A heat exchanger includes: a first heat transfer tube unit including first heat transfer tubes arranged in parallel along a first direction within a horizontal plane; and a second heat transfer tube unit including second heat transfer tubes arranged in parallel with one another along a second direction that intersects the first direction within the horizontal plane. Each of the first heat transfer tubes and the second heat transfer tubes includes: straight portions arranged in parallel in a vertical direction; and one or more curved portions that make end portions of the straight portions communicate with each other. The straight portions of the first heat transfer tube unit and the straight portions of the first heat transfer tube unit are stacked on each other alternately.
1. A heat exchanger configured to transfer heat between a first fluid on a periphery of a heat transfer tube and a second fluid in an interior of the heat transfer tube, the heat exchanger, comprising:
a first heat transfer tube unit comprising a plurality of first heat transfer tubes arranged in parallel with one another along a first direction within a horizontal plane; and
a second heat transfer tube unit comprising a plurality of second heat transfer tubes arranged in parallel with one another along a second direction that is substantially perpendicular to the first direction within the horizontal plane,
wherein each of the plurality of first heat transfer tubes comprises:
a plurality of first straight portions arranged in parallel with and spaced from one another in a vertical direction; and
one or more first curved portions that make end portions of the first straight portions communicate with each other, and
the plurality of first heat transfer tubes form one flow path from an inlet header 80 to an outlet header,
wherein each of the plurality of second heat transfer tubes comprises:
a plurality of second straight portions arranged in parallel with and spaced from one another in the vertical direction; and
one or more second curved portions that make end portions of the second straight portions communicate with each other, and
the plurality of second heat transfer tubes form one flow path from the inlet header to the outlet header, and
wherein the first straight portions and the second straight portions are stacked on each other alternately.
2. The heat exchanger according to claim 1 ,
wherein the plurality of first heat transfer tubes are arranged in parallel with and spaced from one another in the first direction, and
wherein the plurality of second heat transfer tubes are arranged in parallel with and spaced from one another in the second direction.
3. The heat exchanger according to claim 1 ,
wherein the one or more first curved portions have a radius of curvature corresponding to an outside diameter of the second straight portion, and
wherein the one or more second curved portions have a radius of curvature corresponding to an outside diameter of the first curved portion.
4. An absorption refrigerator comprising:
a generator configured to heat a diluted solution to generate a refrigerant vapor and a condensed solution;
a condenser configured to condense the refrigerant vapor generated in the generator;
an evaporator configured to receive a refrigerant solution condensed in the condenser and evaporate the refrigerant solution; and
an absorber configured to make a refrigerant vapor generated by evaporation in the evaporator be absorbed into the condensed solution generated in the generator to generate the diluted solution,
wherein the absorption refrigerator forms an absorption refrigerating cycle of sending the diluted solution generated in the absorber to the generator, and
wherein the heat exchanger according to claim 1 is disposed in at least one of the generator, the condenser, the evaporator and the absorber.