A heat recovery system for preheating fresh air and dissipating heat from equipment

Abstract

The embodiment of the present application discloses a fresh air preheating and equipment heat dissipation heat recovery system, comprising: a fresh air preset coil pipe arranged in a fresh air inlet pipeline of a cabin or a fresh air section of an air conditioner; a return air preheating coil pipe arranged in a return air pipeline of an electrical equipment room air conditioner or a return air section of an air conditioning equipment; and a circulating pump in communication with the fresh air preset coil pipe and the return air preset coil pipe, used to make the intermediate medium flow through the return air preset coil pipe and the fresh air preset coil pipe in sequence when the temperature of outdoor fresh air is lower than the room temperature of the electrical equipment room, form a cycle and perform heat exchange, wherein the intermediate medium preheats the fresh air at the fresh air preset coil pipe and is cooled under the action of the fresh air, precooling the return air at the return air preheating coil pipe and being heated under the action of the return air. In the case that the outdoor temperature is low in winter, the intermediate medium heat recovery cycle system is used to realize the cooling of the electrical equipment room by the fresh air cooling load of the cabin air conditioner.

Description

Technical Field

[0001] This invention relates to the field of heat recovery technology, and in particular to a heat recovery system for preheating fresh air and dissipating heat from equipment. Background Technology

[0002] Modern shipboard air conditioning systems are becoming increasingly complex. These systems must not only meet the temperature and humidity requirements of crew quarters but also the heat dissipation needs of equipment areas. In winter, crew quarters generally require heating, especially for fresh air. Sometimes, when the outside fresh air temperature is too low, a dedicated fresh air preheating system is needed to prevent icing caused by the mixing of fresh and return air. Meanwhile, the heat dissipation of many electrical equipment rooms on board is not seasonal; they require cooling year-round, including in winter.

[0003] Currently, shipboard air conditioning systems are relatively simple, with limited available cooling loads from cabin air conditioning and heat loads from electrical equipment rooms, making their utilization value low. Therefore, cabin heating systems and electrical equipment room cooling systems are completely independent during winter. However, for large cruise ships, the air conditioning systems are extremely large and complex, generating significant cooling loads from cabin air conditioning and heat loads from electrical equipment rooms during winter. Failure to utilize these systems would result in substantial energy waste. Summary of the Invention

[0004] In view of the above-mentioned problems existing in the prior art, the present invention provides a heat recovery system for fresh air preheating and equipment heat dissipation. By adding a heat recovery circulation system between the cabin air conditioning fresh air cooling load and the electrical equipment room heat load, the heating load of the cabin air conditioning system is reduced, and the cooling load of the original air conditioner in the electrical equipment room is reduced. Thus, in winter when the outdoor temperature is low, the heat recovery circulation system through the intermediate medium can be used to cool the electrical equipment room by utilizing the fresh air cooling load of the cabin air conditioning.

[0005] This invention provides a heat recovery system for fresh air preheating and equipment heat dissipation, comprising:

[0006] Fresh air pre-installed coil, which is located in the fresh air intake duct of the cabin or the fresh air section of the air conditioner;

[0007] Return air preheating coil, which is installed in the return air duct of the air conditioning unit in the electrical equipment area or the return air section of the air conditioning unit;

[0008] A circulating pump, connected to the fresh air preset coil and the return air preset coil, is used to allow an intermediate medium to flow sequentially through the return air preset coil and the fresh air preset coil when the temperature of the outdoor fresh air is lower than the room temperature of the electrical equipment room, forming a circulation and performing heat exchange. The intermediate medium preheats the fresh air at the fresh air preset coil and cools it under the action of the fresh air, and precools the return air at the return air preheating coil and heats it under the action of the return air.

[0009] In some embodiments of the invention, there are multiple circulating pumps, and they are arranged based on the cabin layout and electrical equipment locations of the cruise ship;

[0010] A circulation pump is installed between the cabins and electrical equipment within the same designated area to drive the intermediate medium in the fresh air preset coil and return air preset coil within the designated area.

[0011] In some embodiments of the present invention, if there are multiple fresh air preset coils connected to the circulating pump at the same time, and each fresh air preset coil is located in a corresponding fresh air intake duct or fresh air section of an air conditioner in a corresponding cabin, then the multiple fresh air preset coils are connected to the circulating pump after being arranged in parallel.

[0012] In some embodiments of the present invention, if there are multiple return air preheating coils connected to the circulating pump, and each of the return air preheating coils is located in a return air duct or return air section of an air conditioning unit at a corresponding electrical equipment location, then the multiple return air preheating coils are connected in parallel to the circulating pump.

[0013] In some embodiments of the present invention, a first solenoid valve is provided on the fresh air preset coil installed on the fresh air intake duct of each cabin or the fresh air section of the air conditioner to control the flow rate of the intermediate medium in the corresponding fresh air preset coil.

[0014] Each electrical equipment location's air conditioning return air duct or the return air section of the air conditioning unit is equipped with a second solenoid valve on the return air preset coil to control the flow rate of the intermediate medium in the corresponding return air preset coil.

[0015] In some embodiments of the present invention, the first solenoid valve is connected to the air conditioning signal in the cabin corresponding to its corresponding fresh air preset coil, and the opening degree of the first solenoid valve is adjusted based on the air conditioning set temperature in the corresponding cabin.

[0016] In some embodiments of the present invention, the second solenoid valve is connected to the air conditioning signal in the electrical equipment room corresponding to its corresponding return air preset coil, and the opening degree of the second solenoid valve is adjusted based on the set temperature of the air conditioning in the corresponding electrical equipment room.

[0017] In some embodiments of the present invention, if multiple circulation pumps are configured, an air pump is provided on the circulation pipeline of the intermediate medium where any one of the circulation pumps is located, so as to empty the intermediate medium in the circulation pipeline when the temperature of the outdoor fresh air is higher than the room temperature of the electrical equipment room.

[0018] Compared with existing technologies, the beneficial effects of the heat recovery system for fresh air preheating and equipment heat dissipation provided in this embodiment of the invention are as follows: it can recover and utilize the fresh air cooling load of the cabin air conditioner to precool the return air of the electrical equipment space air conditioner, that is, it can preheat the fresh air of the cabin air conditioner and precool the return air of the electrical equipment space air conditioner at the same time. In other words, it reduces the heating load of the cabin air conditioner and also reduces the cooling load of the electrical equipment space air conditioner. Attached Figure Description

[0019] Figure 1 A schematic diagram illustrating the principle of a heat recovery system for fresh air preheating and equipment heat dissipation provided in an embodiment of the present invention. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0022] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0023] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0024] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0025] Specific embodiments of this application are described below with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to ascertain the true intent based on the user's historical operations, and to avoid unnecessary or redundant details that would obscure this application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in various ways with substantially any suitable detailed structure.

[0026] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0027] This invention provides a heat recovery system for fresh air preheating and equipment heat dissipation, such as... Figure 1 As shown, it includes a fresh air preheating coil and a return air preheating coil. The fresh air preheating coil is located in the fresh air intake duct of the cabin or the fresh air section of the air conditioner. The return air preheating coil is located in the return air duct of the air conditioner in the electrical equipment area or the return air section of the air conditioner. A circulation pump is connected to the fresh air preheating coil and the return air preheating coil. When the temperature of the outdoor fresh air is lower than the room temperature of the electrical equipment room, the intermediate medium flows through the return air preheating coil and the fresh air preheating coil in sequence to form a circulation and perform heat exchange. The intermediate medium preheats the fresh air at the fresh air preheating coil and cools it under the action of the fresh air. It precools the return air at the return air preheating coil and heats it under the action of the return air.

[0028] Specifically, when the temperature of the outdoor fresh air is lower than the room temperature of the electrical equipment room, this circulation system can be activated, the circulation pump can be started, and the cooling capacity can be obtained from the fresh air preheating system of the cabin air conditioning using an intermediate medium. The cooled intermediate medium is then sent to the air conditioning refrigeration equipment in the electrical equipment room by the circulation pump to pre-cool the return air of the air conditioner in the electrical equipment room, thus helping to eliminate the heat load of the electrical equipment room. At the same time, the intermediate medium, after being heated by the air conditioner in the electrical equipment room, returns to the fresh air preheating system of the cabin air conditioning to preheat the fresh air of the cabin air conditioning, thereby achieving the effect of energy recovery and reducing the heating load of the cabin air conditioning and the cooling load of the air conditioner in the electrical equipment room.

[0029] In this embodiment, since there are many rooms and cabins with electrical equipment on the cruise ship, it would be a waste of energy to set up only one circulation pipeline. Therefore, multiple circulation pumps can be set up, and the arrangement is based on the distribution of cabins and electrical equipment on the cruise ship. A circulation pump is set up between cabins and electrical equipment within the same set area to drive the intermediate medium in the fresh air preset coil and return air preset coil within the set area. As an example, the intermediate medium can be water or other liquids that can be used as a medium.

[0030] In some embodiments of the present invention, if there are multiple fresh air preset coils connected to the circulating pump at the same time, and each fresh air preset coil is located in a corresponding fresh air intake duct or fresh air section of an air conditioner in a corresponding cabin, then the multiple fresh air preset coils are connected to the circulating pump after being arranged in parallel.

[0031] Furthermore, if there are multiple return air preheating coils connected to the circulating pump, and each return air preheating coil is located in a return air duct or return air section of an air conditioning unit at a corresponding electrical equipment location, then the multiple return air preheating coils are connected to the circulating pump after being arranged in parallel.

[0032] As an example, the air conditioning temperature in electrical equipment rooms is generally set to 24°C year-round. In winter, the supply air temperature of the cabin air conditioning is usually higher than 24°C. In principle, this circulation system can be activated when the outdoor fresh air temperature is lower than the room temperature of the electrical equipment room. The lower the outdoor temperature, the higher the heat recovery efficiency. Simultaneously, the above technical solution can recover the fresh air cooling load of multiple cabin air conditioners and supply return air cooling to the air conditioners in multiple electrical equipment areas.

[0033] Meanwhile, since guests in each cabin have different temperature requirements and adjustment needs, a first solenoid valve is installed on the fresh air preset coil in the fresh air intake duct or fresh air section of the air conditioner in each cabin to control the flow rate of the intermediate medium in the corresponding fresh air preset coil. Furthermore, the first solenoid valve is connected to the air conditioning signal in the cabin corresponding to its fresh air preset coil, and its opening is adjusted based on the set temperature of the corresponding cabin's air conditioning. For example, if the temperature required by the occupants in the cabin is relatively high, the opening of the first solenoid valve can be increased, thereby increasing the flow rate of the intermediate medium in the corresponding fresh air preset coil and preheating the fresh air to a relatively higher temperature. Conversely, if the temperature required by the occupants in the cabin is relatively low, the opening of the first solenoid valve can be decreased, thereby decreasing the flow rate of the intermediate medium in the corresponding fresh air preset coil and preheating the fresh air to a relatively lower temperature.

[0034] In this embodiment, a second solenoid valve is installed on the return air preset coil of the air conditioner in each electrical equipment location's air conditioning return air duct or air conditioning unit to control the flow rate of the intermediate medium in the corresponding return air preset coil. The second solenoid valve is connected to the air conditioning signal in the electrical equipment room corresponding to its corresponding return air preset coil, and the opening degree of the second solenoid valve is adjusted based on the set temperature of the air conditioning in the corresponding electrical equipment room. If the required temperature of the electrical equipment room is relatively low, the opening degree of the second solenoid valve can be increased to increase the flow rate of the intermediate medium in the corresponding return air preset coil, thereby pre-cooling the return air to a relatively lower temperature. If the required temperature of the electrical equipment room is relatively high, the second solenoid valve is operated in reverse.

[0035] In some embodiments of the present invention, if multiple circulation pumps are configured, an air pump is provided on the circulation pipeline of the intermediate medium where any circulation pump is located, so as to empty the intermediate medium in the circulation pipeline when the temperature of the outdoor fresh air is higher than the room temperature of the electrical equipment room, so as to keep the circulation pipeline clean and extend its service life.

[0036] As can be seen from the above technical solution, the heat recovery system for fresh air preheating and equipment heat dissipation provided in the above embodiments of the present invention can recover and utilize the fresh air cooling load of the cabin air conditioner to precool the return air of the electrical equipment space air conditioner. That is, it can preheat the fresh air of the cabin air conditioner and precool the return air of the electrical equipment space air conditioner at the same time. In other words, it reduces the heating load of the cabin air conditioner and also reduces the cooling load of the electrical equipment space air conditioner.

[0037] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A heat recovery system for fresh air preheating and equipment heat dissipation, characterized in that, include: Fresh air preheating coil, which is installed in the fresh air intake duct of the cabin or the fresh air section of the air conditioner; Return air precooling coil, which is installed in the return air duct of the air conditioning unit in the electrical equipment area or the return air section of the air conditioning unit; A circulating pump is connected to the fresh air preheating coil and the return air precooling coil to form an intermediate medium circulation loop. When the temperature of the outdoor fresh air is lower than the room temperature of the electrical equipment room, the intermediate medium flows through the return air precooling coil and the fresh air preheating coil in sequence to form a circulation and perform heat exchange. The intermediate medium obtains cooling energy from the fresh air preheating coil of the cabin or air conditioner. Specifically, when the intermediate medium flows through the fresh air preheating coil, it exchanges heat with the low-temperature outdoor fresh air, releasing its own heat to preheat the fresh air while being cooled by the fresh air. The cooled intermediate medium is then sent to the air conditioning and refrigeration equipment in the electrical equipment space by a circulation pump, where it exchanges heat with the high-temperature return air of the electrical equipment space, absorbing the heat of the return air to precool it. At the same time, it is heated by the return air, precooling the return air of the air conditioner in the electrical equipment space, thus helping to eliminate the heat load of the electrical equipment space. Meanwhile, the intermediate medium, after being heated by the air conditioner in the electrical equipment space, returns to the fresh air preheating coil of the cabin or air conditioner, thereby forming an energy recovery cycle that uses the natural cold source of outdoor fresh air to eliminate the heat load of the electrical equipment space, achieving the effect of energy recovery.

2. The heat recovery system for fresh air preheating and equipment heat dissipation according to claim 1, characterized in that, There are multiple circulating pumps, and they are arranged based on the cabin layout and electrical equipment locations of the cruise ship; A circulation pump is installed between the cabins and electrical equipment within the same defined area to drive the intermediate medium in the fresh air preheating coil and return air precooling coil within the defined area.

3. The heat recovery system for fresh air preheating and equipment heat dissipation according to claim 1, characterized in that, If there are multiple fresh air preheating coils connected to the circulating pump, and each fresh air preheating coil is located in a corresponding fresh air intake duct or fresh air section of an air conditioner in a corresponding cabin, then the multiple fresh air preheating coils are connected to the circulating pump after being arranged in parallel.

4. The heat recovery system for fresh air preheating and equipment heat dissipation according to claim 3, characterized in that, If there are multiple return air precooling coils connected to the circulating pump, and each return air precooling coil is located in a return air duct or return air section of an air conditioning unit at a corresponding electrical equipment location, then the multiple return air precooling coils are connected to the circulating pump after being arranged in parallel.

5. The heat recovery system for fresh air preheating and equipment heat dissipation according to claim 4, characterized in that, Each cabin's fresh air intake duct or the fresh air section of the air conditioner is equipped with a first solenoid valve on the fresh air preheating coil to control the flow rate of the intermediate medium in the corresponding fresh air preheating coil. Each electrical equipment location's air conditioning return air duct or the return air section of the air conditioning unit is equipped with a second solenoid valve on the return air precooling coil to control the flow rate of the intermediate medium in the corresponding return air precooling coil.

6. The heat recovery system for fresh air preheating and equipment heat dissipation according to claim 5, characterized in that, The first solenoid valve is connected to the air conditioning signal in the cabin corresponding to its corresponding fresh air preheating coil, and the opening degree of the first solenoid valve is adjusted based on the air conditioning set temperature in the corresponding cabin.

7. The heat recovery system for fresh air preheating and equipment heat dissipation according to claim 6, characterized in that, The second solenoid valve is connected to the air conditioning signal in the electrical equipment room corresponding to its corresponding return air precooling coil, and the opening degree of the second solenoid valve is adjusted based on the set temperature of the air conditioning in the corresponding electrical equipment room.

8. The heat recovery system for fresh air preheating and equipment heat dissipation according to claim 2, characterized in that, If multiple circulation pumps are set, an air pump is installed on the circulation pipeline of the intermediate medium where any circulation pump is located, so as to empty the intermediate medium in the circulation pipeline when the temperature of the outdoor fresh air is higher than the room temperature of the electrical equipment room.

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