Systems and methods for managing thermal energy
In one aspect, thermal energy storage systems are described herein. In some embodiments, such a system comprises a container, a heat exchanger disposed within the container, and a phase change material (PCM) disposed within the container. The heat exchanger comprises an inlet pipe, an outlet pipe; and a number n of plates in fluid communication with the inlet pipe and the outlet pipe, wherein n is at least 2. The inlet pipe, outlet pipe, and plates are arranged and connected such that a fluid flowing from the inlet pipe and to the outlet pipe flows through the plates in between the inlet pipe and the outlet pipe. The PCM disposed within the container is also in thermal contact with the plates.
1. A thermal energy storage system comprising:
(a) an insulated container defining an interior volume filled with a phase change material;
(b) a heat exchanger disposed within the container, the heat exchanger comprising
(i) an inlet header pipe;
(ii) an outlet header pipe; and
(iii) a plurality of plates immersed or embedded within, and in thermal contact with, the phase change material and arranged within the container substantially parallel to one another, each one of which is independently connected in fluid communication with the inlet header pipe by a respective flexible conduit or hose and is independently connected in fluid communication with the outlet header pipe by a respective flexible conduit or hose such that a specific portion of fluid flowing from the inlet header pipe, through a given plate of the plurality, and then into the outlet header pipe flows only through that given plate to the exclusion of all other plates of the plurality, the fluid flow through the plurality of the plates of the heat exchanger being arranged in parallel; and
(iv) a framework maintaining the arrangement of the plurality of plates within the container;
(c) wherein each of the plurality of plates comprises
(i) a first inflated region defining a first plurality of parallel interior fluid flow channels from the inlet header pipe to the outlet header pipe, the fluid flow through the first plurality of the parallel channels of the first inflated region being arranged in parallel; and
(ii) a second inflated region defining a second plurality of parallel interior fluid flow channels from the inlet header pipe to the outlet header pipe, the fluid flow through the second plurality of the parallel channels of the second inflated region being arranged in parallel; and
(d) wherein each said flexible conduit or hose is configured for disconnect and removal from the plate and the header pipe to which it is connected, which header pipe is configured for capping at the disconnect, and the framework is configured for removal and insertion of the plate for in situ replacement of a damaged plate.
2. The thermal energy storage system of claim 1 , wherein at least one of the plurality of plates has a double inflated channel.
3. The thermal energy storage system of claim 1 , wherein at least one of the plurality of plates has a flat side and an opposite, inflated channel side.
4. The thermal energy storage system of claim 1 , wherein the plates of the plurality are separated from one another by an average distance of between 0.75 and 1.5 inches.
5. The thermal energy storage system of claim 1 , wherein the system further comprises a cover that forms an airtight seal with the container.
6. The thermal energy storage system of claim 5 , wherein the cover is formed from two pieces, each covering approximately half of the container.
7. The thermal energy storage system of claim 6 , wherein the cover comprises a rain channel.
8. The thermal energy storage system of claim 1 , wherein each of the plurality of plates have two heat transfer surfaces in facing opposition to one another, the two heat transfer surfaces being joined to one another and defining therebetween the interior fluid flow channels.
9. The thermal energy storage system of claim 1 , wherein the phase change material is in direct physical contact with the heat exchange surfaces of the immersed or embedded plates.
10. The thermal energy storage system of claim 1 , wherein a plurality of plate spacers provides the framework for maintaining the arrangement of the plurality of plates within the container.