Heat exchanger with pipe bundle

An evaporator unit comprising:

• a heat exchanger comprising:
• a container configured to house a first fluid;
• a first pipe connector and a second pipe connector, each of the first pipe connector and the second pipe connector comprising:
• a cavity;
• and
• a plurality of pipe connection points;
• and
• a pipe bundle arranged inside the container and extending between the first pipe connector and the second pipe connector, wherein pipes of the pipe bundle are configured to guide a second fluid, wherein the pipe bundle in the container is connected to the first pipe connector at the pipe connection points of the first pipe connector and the second pipe connector at the pipe connection points of the second pipe connector so that insides of the pipes of the pipe bundle are in fluid communication with the cavity of the first pipe connector and the cavity of the second pipe connector and thereby provides flow paths configured to guide the second fluid between the first pipe connector and the second pipe connector;
• wherein the heat exchanger is configured to provide a heat transfer between the first fluid and the second fluid through pipe walls of the pipes of the pipe bundle;
• wherein the pipes of the pipe bundle are distributed in layers of the pipes;
• wherein a plurality of pipes of each of the layers of pipes each comprises a first bend and a second bend, where each of said first bend and said second bend is provided between a first flow path section, a second flow path section and a third flow path section of the respective pipe which extend in a longitudinal direction of the container, so that the respective pipe provides three substantially parallel flow path sections;
• wherein the first flow path section has a length-that is at least 1.7 times greater than a length of the second flow path section and the third flow path section;
• wherein the first bend is provided between the first-flow path section and the second flow path section, and wherein the second bend is provided between the second flow path section and the third flow path section;
• wherein each of the layers of pipes comprises a first pipe subgroup and a second pipe subgroup, wherein the first flow path section of the first pipe subgroup is connected to one of the first pipe connector and the second pipe connector, and wherein the first flow path section of the second pipe subgroup is connected to the other one of the first pipe connector and the second pipe connector;
• wherein the second bend between the second flow path section and the third flow path section of the respective pipes in one of the first pipe subgroup and the second pipe subgroup in one of the pipe layers is arranged opposite to the second bend extending between the second flow path section and the third flow path section of the respective pipes in the other one of the first pipe subgroup and the second pipe subgroup of one of the pipe layers;
• a steam container;
• an inlet for a fluid;
• a riser arrangement configured so that steam supplied to the evaporator unit and evaporated in the heat exchanger is configured to be circulated to the steam container;
• and
• a steam outlet for the evaporated steam.

A solar power plant comprising:

• a solar absorber;
• and
• a heat exchanger comprising:
• a container configured to house a first fluid;
• a first pipe connector and a second pipe connector, each of the first pipe connector and the second pipe connector comprising:
• a cavity;
• and
• a plurality of pipe connection points;
• and
• a pipe bundle arranged inside the container and extending between the first pipe connector and the second pipe connector, wherein pipes of the pipe bundle are configured to guide a second fluid, wherein the pipe bundle in the container is connected to the first pipe connector at the pipe connection points of the first pipe connector and the second pipe connector at the pipe connection points of the second pipe connector so that insides of the pipes of the pipe bundle are in fluid communication with the cavity of the first pipe connector and the cavity of the second pipe connector and thereby provides flow paths configured to guide the second fluid between the first pipe connector and the second pipe connector;
• wherein the heat exchanger is configured to provide a heat transfer between the first fluid and the second fluid through pipe walls of the pipes of the pipe bundle;
• wherein the pipes of the pipe bundle are distributed in layers of the pipes;
• wherein a plurality of pipes of each of the layers of pipes each comprises a first bend and a second bend, where each of said first bend and said second bend is provided between a first flow path section, a second flow path section and a third flow path section of the respective pipe which extend in a longitudinal direction of the container, so that the respective pipe provides three substantially parallel flow path sections;
• wherein the first flow path section has a length-that is at least 1.7 times greater than a length of the second flow path section and the third flow path section;
• wherein the first bend is provided between the first-flow path section and the second flow path section, and wherein the second bend is provided between the second flow path section and the third flow path section;
• wherein each of the layers of pipes comprises a first pipe subgroup and a second pipe subgroup, wherein the first flow path section of the first pipe subgroup is connected to one of the first pipe connector and the second pipe connector, and wherein the first flow path section of the second pipe subgroup is connected to the other one of the first pipe connector and the second pipe connector;
• wherein the second bend between the second flow path section and the third flow path section of the respective pipes in one of the first pipe subgroup and the second pipe subgroup in one of the pipe layers is arranged opposite to the second bend extending between the second flow path section and the third flow path section of the respective pipes in the other one of the first pipe subgroup and the second pipe subgroup of one of the pipe layers.