A boiler for a solar receiver includes a plurality of boiler walls arranged end to end surrounding a boiler interior space. Each wall includes a plurality of side by side solar receiver panels. The panels are fluidly connected to one another by way of a steam circuit. The boiler also includes a plur
A boiler for a solar receiver includes a plurality of boiler walls arranged end to end surrounding a boiler interior space. Each wall includes a plurality of side by side solar receiver panels. The panels are fluidly connected to one another by way of a steam circuit. The boiler also includes a plurality of conduits each forming a portion of the steam circuit fluidly connecting the panels. The panels and conduits form a plurality of heat transfer passes in the steam circuit. In certain embodiments, the steam circuit includes between two and ten passes, inclusively.
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1. A boiler for a solar receiver comprising: a) a plurality of boiler walls arranged end to end surrounding a boiler interior space, each wall including a plurality of side by side solar receiver panels, wherein the panels are fluidly connected to one another by way of a steam circuit; andb) a plura
1. A boiler for a solar receiver comprising: a) a plurality of boiler walls arranged end to end surrounding a boiler interior space, each wall including a plurality of side by side solar receiver panels, wherein the panels are fluidly connected to one another by way of a steam circuit; andb) a plurality of conduits each forming a portion of the steam circuit fluidly connecting the panels, wherein the panels and conduits form at least four heat transfer passes in the steam circuit, wherein each heat transfer pass is on a respective boiler wall and is separated from an adjacent pass by at least a horizontal component of the steam circuit, wherein a first pass is on an opposite one of the boiler walls from a fourth pass and a second pass is on an opposite one of the boiler walls from a third pass for substantially uniform heating of the steam circuit regardless of the position of the sun, and wherein at least one of the conduits is a cross-over conduit forming a portion of the steam circuit and fluidly connecting panels on a first one of the boiler walls directly to panels on a second one of the boiler walls opposite to the first one of the boiler walls, for fluid communication between the first one of the boiler walls and the second one of the boiler walls. 2. A boiler as recited in claim 1, wherein the steam circuit includes between five and ten passes, inclusively. 3. A boiler as recited in claim 1, wherein each pass includes four parallel panels, wherein the panels are substantially coplanar. 4. A boiler as recited in claim 1, wherein the steam circuit includes six passes. 5. A boiler as recited in claim 4, wherein each pass includes a pair of parallel panels, wherein at least some of the pairs of parallel panels include panels that are substantially coplanar, and at least some of the pairs of parallel panels include panels that are oriented at an angle with respect to one another to form a boiler wall corner, wherein a first pair of parallel panels are arranged to face North and South and a second pair of panels are arranged to face East and West. 6. A boiler as recited in claim 1, wherein the steam circuit includes eight passes. 7. A boiler as recited in claim 1, wherein the steam circuit includes a first connector conduit fluidly connecting the first pass with the second pass, with a second connector conduit fluidly connecting the third pass with the fourth pass, and with the cross-over conduit fluidly connecting the second pass with the third pass. 8. A boiler as recited in claim 7, wherein a first pair of parallel panels are arranged to face North and South and a second pair of panels are arranged to face East and West. 9. A boiler as recited in claim 1, wherein the steam circuit includes six passes, and wherein at least one pass includes a pair of parallel panels oriented at an angle to form a boiler wall corner. 10. A boiler for a solar receiver comprising: a) a plurality of boiler walls arranged end to end surrounding a boiler interior space, each wall including a plurality of side by side solar receiver panels, wherein a first portion of the panels are fluidly connected to one another by way of a first steam circuit, and wherein a second portion of the panels are fluidly connected to one another by way of a second steam circuit;b) a first plurality of conduits each forming a portion of the first steam circuit fluidly connecting the panels of the first steam circuit, wherein the panels and conduits of the first steam circuit form at least four heat transfer passes in the first steam circuit, wherein each heat transfer pass of the first steam circuit is on a respective boiler wall and is separated from an adjacent pass of the first steam circuit by at least a horizontal component of the first steam circuit, wherein a first pass of the first steam circuit is on an opposite one of the boiler walls from a fourth pass of the first steam circuit and a second pass of the first steam circuit is on an opposite one of the boiler walls from a third pass of the first steam circuit for substantially uniform heating of the first steam circuit regardless of the position of the sun;c) a second plurality of conduits each forming a portion of the second steam circuit fluidly connecting the panels of the second steam circuit, wherein the panels and conduits of the second steam circuit form at least four heat transfer passes in the second steam circuit, wherein each heat transfer pass of the second steam circuit is on a respective boiler wall and is separated from an adjacent pass of the second steam circuit by at least a horizontal component of the second steam circuit, wherein a first pass of the second steam circuit is on opposite one of the boiler walls from a fourth pass of the second steam circuit and a second pass of the second steam circuit is on an opposite one of the boiler walls from a third pass of the second steam circuit for substantially uniform heating of the second steam circuit regardless of the position of the sun; andd) a cross-over conduit forming a portion of at least one of the first and second steam circuits and fluidly connecting panels on a first one of the boiler walls to panels on a second one of the boiler walls opposite to the first one of the boiler walls, for fluid communication between the first one of the boiler walls and the second one of the boiler walls. 11. A boiler as recited in claim 10, wherein each steam circuit includes between five and ten passes, inclusively. 12. A boiler as recited in claim 10, wherein each pass includes four parallel panels, wherein the panels of each pass are substantially coplanar. 13. A boiler as recited in claim 10, wherein each steam circuit includes six passes. 14. A boiler as recited in claim 13, wherein each pass includes a pair of parallel panels, wherein at least some of the pairs of parallel panels include panels that are substantially coplanar, and at least some of the pairs of parallel panels include panels that are oriented at an angle with respect to one another to form a boiler wall corner, wherein a first pair of parallel panels are arranged to face North and South and a second pair of panels are arranged to face East and West. 15. A boiler as recited in claim 10, wherein each steam circuit includes eight passes.
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