CN117944864A - Waste heat recovery system of polar region ship cabin air conditioner - Google Patents
Waste heat recovery system of polar region ship cabin air conditioner Download PDFInfo
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- 238000011084 recovery Methods 0.000 title claims abstract description 89
- 239000002918 waste heat Substances 0.000 title claims abstract description 54
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- 238000007710 freezing Methods 0.000 claims abstract description 58
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Abstract
The embodiment of the invention provides a heat recovery system of an air conditioner of a polar region ship cabin, which comprises the following components: an air conditioning cabin with an indoor temperature of greater than 15 ℃ during polar navigation or operation; the air-conditioning cabin exhaust heat recovery heat exchanger comprises an insulation box body and a first heat exchange coil which is arranged in the insulation box body and internally flows through a heat transfer medium, and during heat recovery, exhaust air in the air-conditioning cabin flows to the air-conditioning cabin exhaust heat recovery heat exchanger, and the first heat exchange coil recovers waste heat in exhaust air through the heat transfer medium; the fresh air inlet heater is arranged at a fresh air inlet of the air conditioner or a fresh air inlet of the cabin and comprises a second heat exchange coil pipe with heat transfer medium flowing through the interior, and when heat is recovered, the heat transfer medium with waste heat recovered flows through the second heat exchange coil pipe to heat low-temperature outdoor air flowing to the outer surface of the second heat exchange coil pipe; and an antifreeze fluid heat tracing pipe which is laid at the position of the device needing anti-freezing on the ship and is internally provided with a heat-carrying medium is used for preventing freezing of the corresponding device through the heat-carrying medium which flows through and is recovered with waste heat.
Description
Technical Field
The invention relates to the technical field of cold-proof technology of ships with low air temperature and air-conditioning heating, in particular to a waste heat recovery system of an air conditioner of a polar region ship cabin.
Background
The ship has the advantages that the ship contains rich oil gas, mineral products, fishery, travel and other resources, and the ship can be operated in a standardized way in the polar navigation with the continuous upgrading of the polar economic and strategic value in recent years, so that the ship becomes a hotspot in international shipping. However, the domestic polar marine industry is still in a starting stage, and related equipment and system design is still carried out by adopting a conventional ship, so that the method is only upgraded and enhanced.
For polar vessel cabin air conditioning systems, as shown in fig. 1, a conventional vessel central air conditioning system is generally employed. Under the polar region heating working condition, in order to ensure the cleanliness of indoor air, hot and humid air processed by an air conditioning unit is mixed with air in a cabin and subjected to heat and humidity exchange, most of mixed air (generally at least 50% larger than total air supply quantity) is directly discharged into an outdoor environment, so that great waste of energy is caused.
Meanwhile, the temperature of the polar region is very low, the lowest daily low temperature in winter in the north-south polar sea area can reach minus 38 ℃,
When a ship sails in a low-temperature area, the ship is easily affected by snow accumulation, freezing and the like, and great safety risks are brought to the ship, personnel and equipment. In order to eliminate the negative effects of freezing, snow accumulation and the like on ship equipment and systems in low-temperature environments, an outdoor cold-proof system is generally configured at present, and a heating means is adopted to ensure that the equipment or the system can be used immediately under the protection of the outdoor cold-proof system; the heating source can be steam, hot oil, hot water, electric tracing and the like, and the equipment to be heated comprises a fresh air inlet and a closing device thereof, an escape passage, an outdoor operation area and passage, an outdoor stairway, a handrail, an outdoor door, a door frame and the like. The outdoor heating users are very many, and a great deal of energy is consumed.
At present, a cabin air conditioning system and an outdoor cold-proof heating system of the polar region ship are two completely independent systems, and no relation exists between the two systems.
Meanwhile, the ship in the prior art has the following problems:
1. Under heating conditions, the central air conditioner sends the treated hot air to each air conditioning cabin through an air pipe so as to maintain the set temperature (humidity) of the cabin, and the exhaust air of the polar region ship central air conditioning system has higher energy (about 20 ℃), and the air waste heat with high energy is directly discharged to the outdoor environment, so that energy waste exists; the outdoor cold-proof system generally needs to heat the surface temperature of equipment from the local environment temperature to more than 0 ℃ and consumes certain energy; the existing air conditioning system and the outdoor cold-proof system are not related, the characteristics of the energy between the air conditioning system and the outdoor cold-proof system cannot be effectively utilized, the waste heat discharged by the air conditioning system cannot be effectively utilized, and energy double loss exists.
2. The polar ecology environment is fragile and sensitive, pollution is difficult to naturally recover, and as the polar development force is increased, the influence of the ship on the environment is gradually developed, and the emission of harmful gas and greenhouse gas of the ship is aggravated by the waste of the energy source in the prior art, so that the polar ecology protection and sustainable development concept are not facilitated.
3. The polar region ship is long in voyage, long in operation time, unable to supplement fuel, and the fuel of the whole voyage is carried, and the prior art does not effectively utilize the higher exhaust energy of the air conditioning system, so that the fuel reserve of the ship is increased, the loading of the ship is reduced, and the operation benefit of the ship is reduced.
4. In the prior art, energy is wasted, so that the capacity of energy conversion equipment (such as a generator set or a boiler) is required to be increased, and the initial investment cost of the ship is increased.
5. At present, the outdoor cold-proof system of the ship has the advantages that the heat source is positioned in the ship body below the main deck, the user is positioned in the living area, and a certain distance exists between the heat source and the main deck, so that the distance between a pipeline and a cable for connecting the heat source and the cable is longer, and the control of the weight of an empty ship of the ship is not facilitated
Disclosure of Invention
In view of the above problems in the prior art, the embodiments of the present invention provide a heat recovery system for a polar region ship cabin air conditioner, which is suitable for the situation that the existing polar region ship cabin air conditioner is not energy-saving and has high operation cost, and the energy characteristics of an exhaust air and outdoor cold-proof system of the ship cabin air conditioner system are utilized to organically combine the two using conditions, so as to provide a heat recovery system suitable for the polar region ship cabin air conditioner; the heat recovery system can effectively utilize the exhaust energy of the cabin air conditioning system and reduce the energy additional consumption of the outdoor cold-proof system, thereby achieving the purposes of reducing the capacity of ship energy conversion equipment (such as a generator set or a boiler), reducing the emission of ship harmful gas and greenhouse gas, optimizing the ship configuration and finally realizing energy conservation and emission reduction.
The embodiment of the invention provides a heat recovery system of an air conditioner of a polar region ship cabin, which comprises the following components:
An air conditioning cabin comprising a cabin having an indoor temperature greater than 15 ℃ during polar navigation or operation;
The air-conditioning cabin exhaust heat recovery heat exchanger comprises an insulation box body and a first heat exchange coil pipe arranged in the insulation box body, wherein heat transfer medium flows through the first heat exchange coil pipe, and when in heat recovery operation, exhaust air of the air-conditioning cabin flows to the air-conditioning cabin exhaust heat recovery heat exchanger through an air-conditioning cabin exhaust pipe, and the first heat exchange coil pipe recovers waste heat in the exhaust air through the heat transfer medium;
the fresh air inlet heater is arranged at a fresh air inlet of the air conditioner or a fresh air inlet of the cabin and comprises a second heat exchange coil, a heat transfer medium flows through the second heat exchange coil, and when the heat recovery operation is carried out, the heat transfer medium with waste heat recovered in the first heat exchange coil flows to the second heat exchange coil and heats low-temperature outdoor air flowing to the outer surface of the second heat exchange coil;
The antifreeze heat tracing pipe is laid at a device which needs to be frozen on the ship, and a heat-carrying medium is arranged in the antifreeze heat tracing pipe so as to prevent freezing of the corresponding device provided with the antifreeze heat tracing pipe through the heat-carrying medium with waste heat recovered in the first heat exchange coil.
In some embodiments of the present invention, the heat recovery system of the polar region ship cabin air conditioner further comprises:
The anti-freezing liquid circulating pump set comprises a variable-frequency anti-freezing liquid circulating pump, an expansion water tank and a supplementing tank, wherein the anti-freezing liquid circulating pump is controlled by variable frequency and is used for forcedly circulating anti-freezing liquid in a closed pipeline, the variable-frequency speed regulation is carried out on the anti-freezing liquid circulating pump according to a first temperature sensor at a freezing liquid outlet of an air-conditioning cabin exhaust heat recovery heat exchanger so as to regulate the circulating flow, and the expansion water tank and the supplementing tank are used for supplementing the anti-freezing liquid in the closed circulating pipeline;
The first heat exchange coil, the second heat exchange coil and the antifreeze heat tracing pipe are all communicated with the antifreeze circulating pump set.
In some embodiments of the present invention, the heat recovery system of the polar region ship cabin air conditioner further comprises: the second temperature sensor is arranged on the fresh air inlet heater;
The flow regulating valve is arranged on the outlet pipeline of the fresh air inlet heater;
Based on the second temperature sensor and the flow regulating valve, the heat carrier medium flow of the corresponding fresh air inlet heater can be controlled by regulating the flow regulating valve, and then the temperature is controlled.
In some embodiments of the present invention, the air conditioning compartment exhaust duct includes an exhaust fan and an exhaust duct to deliver high heat air of the air conditioning compartment to the air conditioning compartment exhaust heat recovery heat exchanger through the air exhaust fan;
the exhaust fan is any one of a pipeline fan, a centrifugal fan or an axial flow fan, and the exhaust pipeline is wrapped with a heat insulation material.
In some embodiments of the invention, the fresh air inlet heater further comprises: the filter screen, the water mist removing device, the condensation pipeline and the shell, wherein,
The filter screen is used for primarily filtering outdoor air;
the water mist removing device is used for removing redundant moisture in outdoor humid air and discharging the redundant moisture out of the ship through a condensation pipeline;
the shell is used for fixedly supporting the fresh air inlet heater.
In some embodiments of the invention, the means for preventing ice on the watercraft comprises at least escape passage boards, outdoor work areas and passage boards, outdoor stairways and handrail, outdoor doors and door frames;
When the plate-shaped anti-freezing device is used, the anti-freezing liquid heat tracing pipe is stuck below the plate-shaped anti-freezing device in a coil shape, and is wrapped and fixed by the heat preservation cotton and the plate-shaped anti-freezing device;
when the tubular anti-freezing device is used, the anti-freezing liquid heat tracing pipe is applied to the outer surface of the tubular anti-freezing device in a spiral line mode along the tubular anti-freezing device, and is wrapped and fixed with the tubular anti-freezing device by using heat insulation cotton.
In some embodiments of the invention, the air conditioning cabin exhaust heat recovery heat exchanger, the fresh air inlet heater and the antifreeze circulating pump set are all connected through pipelines, and the outside of the pipelines is coated with an insulating layer and made of corrosion-resistant materials.
In some embodiments of the invention, the heat transfer medium employs ethylene glycol water or propylene glycol water of a set concentration as the antifreeze.
In some embodiments of the present invention, the operation flow of the heat recovery system of the polar region ship cabin air conditioner during operation is as follows:
Firstly, warmer air in an air-conditioning cabin is conveyed to an air-conditioning cabin exhaust heat recovery heat exchanger through an air-conditioning cabin exhaust pipe and an exhaust fan thereof, and cabin exhaust gas with higher temperature in the air-conditioning cabin exhaust heat recovery heat exchanger exchanges heat with antifreeze fluid and recovers heat, so that the temperature of the antifreeze fluid is increased;
under the action of an antifreezing solution circulating pump set, the antifreezing solution with higher temperature is pumped to a waste heat utilization device comprising a fresh air inlet heater and an antifreezing solution heat tracing pipe, and the antifreezing solution with higher temperature in the waste heat utilization device heats outdoor fresh air or a device needing freezing prevention, so that the temperature of the outdoor fresh air and the temperature of each antifreezing device are ensured to be heated to be higher than 0 ℃;
after passing through the waste heat utilization device, the antifreeze with higher temperature is reduced to low-temperature antifreeze, and flows back to the air-conditioning cabin exhaust heat recovery heat exchanger for waste heat recovery under the action of the antifreeze circulating pump set, and is circulated back and forth according to the flow.
Compared with the prior art, the waste heat recovery system of the polar region ship cabin air conditioner has the beneficial effects that: firstly, the energy demand characteristics (heating to 0 ℃ and above) of an air conditioning system of a ship cabin and an outdoor cold-proof system are utilized, the using conditions of the air conditioning system and the outdoor cold-proof system are organically combined, exhaust waste heat of the air conditioner which needs to be exhausted outdoors is recovered and transferred to the outdoor cold-proof equipment which needs to be heated, waste materials are changed into valuable materials through waste heat energy recovery and transfer, and the purpose of energy conservation is achieved.
In addition, the waste heat recovery system of the polar region ship cabin air conditioner provided by the embodiment of the invention also reduces the energy consumption rate of the ship, and the harmful gas and the greenhouse gas of the ship are correspondingly reduced, so that the polar region ship cabin air conditioner is friendly to the fragile polar region ecological environment and is beneficial to sustainable development of polar region resources.
And the waste heat recovery system of the polar region ship cabin air conditioner further reduces the energy consumption rate of the ship, reduces the capacity and weight of energy conversion equipment (such as a generator set or a boiler) of the ship, reduces the fuel storage capacity of the ship, reduces the weight of an empty ship, improves the available loading capacity of the ship, and is beneficial to the initial investment construction cost and the later operation cost of the ship.
Furthermore, in the waste heat recovery system of the polar region ship cabin air conditioner provided by the embodiment of the invention, the heat source and the user of the ship outdoor cold-proof system are both positioned at the same place of the ship (in the ship living area), so that the lengths of connecting pipelines and cables of the heat source and the user of the outdoor cold-proof system are reduced, and the control of the weight of the ship and the construction cost is facilitated.
In addition, the waste heat recovery system of the polar region ship cabin air conditioner provided by the embodiment of the invention optimizes the ship performances such as the ship fuel hold, the empty ship weight, the energy consumption and the like, improves the overall performance of the ship, responds to the low-carbon requirement of the current ship and is beneficial to popularization and utilization of the polar region ship air conditioner system.
Drawings
FIG. 1 is a schematic diagram of a polar region marine cabin air conditioning system of the prior art;
Fig. 2 is a schematic structural diagram of a waste heat recovery system of an air conditioner for a polar region ship cabin according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another heat recovery system of an air conditioner for a polar region ship cabin according to an embodiment of the present invention.
Reference numerals
1. An air conditioning cabin; 2. an air-conditioning cabin exhaust heat recovery heat exchanger; 3. an air-conditioning cabin exhaust pipe;
4. Fresh air inlet heater; 5. an antifreeze fluid heat tracing pipe; 6. an antifreeze fluid circulating pump group;
7. An expansion water tank and a supplementary tank; 8.a flow regulating valve.
Detailed Description
The present invention will be described in detail below with reference to the drawings and detailed description to enable those skilled in the art to better understand the technical scheme of the present invention.
Various aspects and features of the present application are described herein with reference to the accompanying drawings.
These and other characteristics of the application will become apparent from the following description of a preferred form of embodiment, given as a non-limiting example, with reference to the accompanying drawings.
It is also to be understood that, although the application has been described with reference to some specific examples, a person skilled in the art will certainly be able to achieve many other equivalent forms of the application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present application will become more apparent in light of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application will be described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well known and/or repeated functions and constructions are not described in detail to avoid obscuring the application in unnecessary or unnecessary detail from historical operations of the user. Therefore, specific structural and functional details disclosed herein are not intended to be limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the word "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
The embodiment of the invention provides a heat recovery system of an air conditioner of a polar region ship cabin, as shown in fig. 2 and 3, comprising:
The air conditioning cabin 1 comprises a plurality of air conditioning cabins 1, wherein the indoor temperature of the air conditioning cabin 1 is higher than 15 ℃ in the polar navigation or operation process, and particularly the air conditioning cabin 1 is defined in a broad sense, so long as the cabin with the indoor temperature higher than 15 ℃ in the polar navigation or operation process can be used as the air conditioning cabin 1, and the air conditioning cabin is a heat source of the cabin waste heat recovery system. According to the requirements of polar region ships, the indoor temperature of equipment rooms (such as networks, navigation equipment rooms and the like) with larger heating value is also higher than 15 ℃ in common people places and is higher than 18 ℃, so that a large amount of recyclable waste heat of an air-conditioning cabin 1 exists on the polar region ships;
The air conditioning cabin exhaust heat recovery heat exchanger 2 comprises an insulation box body and a first heat exchange coil pipe arranged in the insulation box body, wherein a heat transfer medium flows through the first heat exchange coil pipe, during heat recovery operation, exhaust air of the air conditioning cabin 1 flows to the air conditioning cabin exhaust heat recovery heat exchanger 2 through an air conditioning cabin exhaust pipe 3, and the first heat exchange coil pipe recovers waste heat in the exhaust air through the heat transfer medium; in this embodiment, the air conditioning cabin exhaust heat recovery heat exchanger 2 is a core component of the present invention, and mainly comprises a heat exchange coil and an insulation box, wherein the insulation box mainly prevents heat loss in the heat exchange process, and the recovery heat exchanger is essentially an air-water exchanger. During heat recovery operation, the air exhausted by the air conditioning cabin 1 flows through the surface of the air conditioning cabin exhaust heat recovery heat exchanger 2, and the waste heat is recovered by the antifreeze fluid flowing through the heat exchange coil. Because the heat transfer medium (antifreeze) has certain corrosiveness, the air conditioning cabin exhaust heat recovery heat exchanger 2 needs to be made of corrosion-resistant materials such as stainless steel;
The fresh air inlet heater 4 is arranged at a fresh air inlet of an air conditioner or a fresh air inlet of a cabin and is one of users using waste heat, and comprises a second heat exchange coil, wherein a heat transfer medium flows through the second heat exchange coil, and when the heat recovery operation is carried out, the heat transfer medium with the waste heat recovered in the first heat exchange coil flows to the second heat exchange coil, so as to heat low-temperature outdoor air flowing to the outer surface of the second heat exchange coil, namely, the heat transfer medium (antifreeze) flows in the second heat exchange coil, and outdoor cold air passing outside the second heat exchange coil;
In this embodiment, the fresh air inlet heater 4 further includes: the filter screen, the water mist removing device, the condensation pipeline and the shell, wherein,
The filter screen is used for primarily filtering outdoor air;
the water mist removing device is used for removing redundant moisture in outdoor humid air, so that a large amount of condensed water in a fresh air pipeline of the air conditioner is avoided, and the moisture removed by the water mist removing device is discharged out of the ship through the condensed water pipeline;
the shell is used for fixedly supporting the fresh air inlet heater 4.
When the fresh air inlet heater 4 performs heat recovery operation, a heat-carrying medium (antifreeze) with recovered heat flows through a heat exchange coil of the fresh air inlet heater 4, and meanwhile, low-temperature outdoor air flows through the outer surface of the fresh air inlet heater 4, and the heat exchange and the recovered waste heat utilization are performed on the low-temperature outdoor air and the low-temperature outdoor air, so that the outdoor fresh air is heated to be above 0 ℃ and then is sent into a fresh air treatment device.
The antifreeze heat tracing pipe 5 is laid at a device needing to prevent freezing on a ship, is one of users using waste heat, and a heat-carrying medium is arranged in the antifreeze heat tracing pipe 5, so that the corresponding device provided with the antifreeze heat tracing pipe 5 is prevented from being frozen by the heat-carrying medium with the waste heat recovered in the first heat exchange coil.
In this embodiment, the device on the ship that needs to be anti-freezing at least includes escape passage board, outdoor operation area and passage board, outdoor stairway and handrail, outdoor door and door frame;
When the plate-shaped anti-freezing device (such as an escape passage steel plate) is used, the anti-freezing liquid heat tracing pipe 5 is stuck below the plate-shaped anti-freezing device (such as the escape passage steel plate) in a coil shape, and is wrapped and fixed by heat-insulating cotton and the plate-shaped anti-freezing device (such as the escape passage steel plate);
When using a tubular anti-freezing device (such as an outdoor handrail), the anti-freezing liquid heat tracing pipe 5 is applied to the outer surface of the tubular anti-freezing device (such as an outdoor handrail) in a spiral manner along the tubular anti-freezing device (such as an outdoor handrail), and is wrapped and fixed with heat insulation cotton and the tubular anti-freezing device (such as an outdoor handrail).
The anti-freezing liquid heat tracing pipe 5 and the anti-freezing device are directly attached to ensure good heat conductivity, and heat insulation cotton is adopted to prevent heat of the anti-freezing liquid heat tracing pipe 5 from being directly dissipated into the air (not transmitted to the anti-freezing device)
In some embodiments of the present invention, the heat recovery system of the polar region ship cabin air conditioner further comprises:
The antifreeze circulation pump set 6 comprises a variable-frequency antifreeze circulation pump, an expansion water tank and a supplementing tank 7, wherein the antifreeze circulation pump is controlled by variable frequency and is used for forcedly circulating the antifreeze in the closed type pipeline, the antifreeze circulation pump is subjected to variable-frequency speed regulation according to a first temperature sensor at the coolant outlet of the air-conditioning cabin exhaust heat recovery heat exchanger 2 so as to regulate the circulation flow, the temperature in the antifreeze circulation pipeline is ensured to meet the heat supply requirement, and the expansion water tank and the supplementing tank 7 are used for supplementing the antifreeze in the closed type circulation pipeline;
the first heat exchange coil, the second heat exchange coil and the antifreeze heat tracing pipe 5 are all communicated with the antifreeze circulating pump group 6.
In some embodiments of the present invention, the heat recovery system of the polar region ship cabin air conditioner further comprises: the second temperature sensor is arranged on the fresh air inlet heater 4;
A flow rate regulating valve 8 provided in an outlet line of the fresh air inlet heater 4;
Based on the second temperature sensor and the flow regulating valve 8, the heat transfer medium flow of the corresponding fresh air inlet heater 4 can be controlled by regulating the flow regulating valve 8, so that the temperature control is realized, namely, the antifreeze flow of each fresh air inlet heater 4 can be automatically temperature-controlled through the second temperature sensor and the flow regulating valve 8 according to the requirement.
In some embodiments of the present invention, the air conditioning compartment exhaust duct 3 includes an exhaust fan and an exhaust duct for delivering high heat air of the air conditioning compartment 1 to the air conditioning compartment exhaust heat recovery heat exchanger 2 through the air exhaust fan; the exhaust fan is any one of a pipeline fan, a centrifugal fan or an axial flow fan, and in order to avoid heat loss of high-heat air of the exhaust pipeline in the conveying process, the exhaust pipeline is wrapped with a heat insulation material.
In some embodiments of the present invention, the air conditioning cabin exhaust heat recovery heat exchanger 2, the fresh air inlet heater 4 and the antifreeze circulating pump set 6 are all connected through pipelines, and the outside of the pipeline is coated with an insulating layer and made of corrosion-resistant materials.
In some embodiments of the invention, the air conditioning cabin exhaust heat recovery heat exchanger 2, the fresh air inlet heater(s) 4 and the antifreeze circulating pump set 6 are connected through pipelines. The pipeline is used as a flowing channel of heat transfer medium (antifreeze), and an insulating layer is coated outside the pipeline for preventing heat loss in the pipeline conveying process; meanwhile, the pipeline can bear corrosion of antifreeze, and generally, stainless steel and other corrosion-resistant materials are adopted. The heat transfer medium adopts ethylene glycol water or propylene glycol water with a certain concentration as an antifreezing solution, and the antifreezing solution cannot be frozen in the pipeline in order to avoid frost cracking of the pipeline, and the concentration of the antifreezing solution depends on the environmental temperature of the polar region; considering that the antifreeze is in direct contact with the polar open-air environment temperature, the concentration selection of the antifreeze needs caution, wherein 60% of ethylene glycol water antifreeze can be used for the environment temperature of about-50 ℃ so as to meet the environment requirements of most polar ships.
In addition, in the above embodiments, the heat recovery system of the polar vessel cabin air conditioner further includes necessary piping valve members, and sensors and accessories required for automatic temperature control, etc.
In some embodiments of the present invention, the operation flow of the heat recovery system of the polar region ship cabin air conditioner during operation is as follows:
firstly, warmer air in an air-conditioning cabin 1 is conveyed to an air-conditioning cabin exhaust heat recovery heat exchanger 2 through an air-conditioning cabin exhaust pipe 3 and an exhaust fan thereof, and cabin exhaust air with higher temperature in the air-conditioning cabin exhaust heat recovery heat exchanger 2 exchanges heat with antifreeze fluid and is subjected to heat recovery, so that the temperature of the antifreeze fluid is increased;
Under the action of the antifreeze circulating pump set 6, the antifreeze with higher temperature is pumped to a waste heat utilization device comprising a fresh air inlet heater 4 and an antifreeze heat tracing pipe 5, and the antifreeze with higher temperature in the waste heat utilization device heats outdoor fresh air or a device needing anti-freezing, so that the outdoor fresh air and the temperature of each antifreeze are heated to be above 0 ℃ to avoid freezing, thereby ensuring the safety of ships, crews and equipment in polar regions;
after passing through the waste heat utilization device, the antifreeze with higher temperature is reduced to low-temperature antifreeze, and flows back to the air-conditioning cabin exhaust heat recovery heat exchanger 2 for waste heat recovery under the action of the antifreeze circulating pump set 6, and is circulated back and forth according to the flow.
According to the technical scheme, the polar region ship cabin air conditioning system and the outdoor cold-proof system are organically combined, waste heat energy is recovered and transferred, waste materials are changed into things of value, and the purposes of energy conservation and emission reduction are achieved; meanwhile, when the waste heat of the air conditioner is utilized to heat fresh air of the air conditioner, the exhaust pipe and the fresh air port are provided with water-air heat exchangers, long-distance energy recovery can be realized through antifreeze circulation, the exhaust air of the cabin air conditioner is completely separated from the outdoor fresh air and is not contacted with the outdoor fresh air, cross pollution is avoided, and the fresh air of the air conditioner is not polluted by the exhaust air of the air conditioner; in addition, the intelligent air conditioner can automatically adjust the flow of the heat transfer medium according to the outdoor air temperature, has high intelligent degree, reduces the maintenance workload of a shipman, and is beneficial to energy saving.
Furthermore, the waste heat recovery system of the polar region ship cabin air conditioner provided by the embodiment of the invention utilizes the energy demand characteristics (heating to 0 ℃ and above) of the ship cabin air conditioning system exhaust air (about 20 ℃) and the outdoor cold-proof system, organically combines the using conditions of the ship cabin air conditioning system exhaust air and the outdoor cold-proof system, recovers the exhaust waste heat of the air conditioner which needs to be exhausted outdoors, transfers the exhaust waste heat to the outdoor cold-proof equipment which needs to be heated, and changes waste into valuable through waste heat energy recovery and transfer, thereby achieving the purpose of energy conservation.
In addition, the waste heat recovery system of the polar region ship cabin air conditioner provided by the embodiment of the invention also reduces the energy consumption rate of the ship, and the harmful gas and the greenhouse gas of the ship are correspondingly reduced, so that the polar region ship cabin air conditioner is friendly to the fragile polar region ecological environment and is beneficial to sustainable development of polar region resources.
And the waste heat recovery system of the polar region ship cabin air conditioner further reduces the energy consumption rate of the ship, reduces the capacity and weight of energy conversion equipment (such as a generator set or a boiler) of the ship, reduces the fuel storage capacity of the ship, reduces the weight of an empty ship, improves the available loading capacity of the ship, and is beneficial to the initial investment construction cost and the later operation cost of the ship.
Furthermore, in the waste heat recovery system of the polar region ship cabin air conditioner provided by the embodiment of the invention, the heat source and the user of the ship outdoor cold-proof system are both positioned at the same place of the ship (in the ship living area), so that the lengths of connecting pipelines and cables of the heat source and the user of the outdoor cold-proof system are reduced, and the control of the weight of the ship and the construction cost is facilitated.
In addition, the waste heat recovery system of the polar region ship cabin air conditioner provided by the embodiment of the invention optimizes the ship performances such as the ship fuel hold, the empty ship weight, the energy consumption and the like, improves the overall performance of the ship, responds to the low-carbon requirement of the current ship and is beneficial to popularization and utilization of the polar region ship air conditioner system.
In summary, the waste heat recovery system of the polar region ship cabin air conditioner provided by the embodiment of the invention can strongly support the polar region ship design, research and construction work of enterprises. With the preemptive development of polar resources in various countries, polar vessels are increasingly hot, and cabin air conditioning and outdoor cold-proof systems are problems that all polar vessels or devices must consider and face; the invention organically combines the polar region ship cabin air conditioning system and the outdoor cold-proof system, is applicable to all polar region ships, has very high universality, and can improve the market competitiveness of the polar region ship design and construction of the enterprise.
In the invention, the waste heat recovery of a cabin air conditioning system is adopted, so that the energy consumption is reduced, the energy conservation and the carbon reduction are facilitated, and the ecological environment protection in the polar region and the sustainable development of resources are facilitated.
The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this invention will occur to those skilled in the art, and are intended to be within the spirit and scope of the invention.
Claims (9)
1. A heat recovery system for a polar region marine cabin air conditioner, comprising:
An air conditioning cabin comprising a cabin having an indoor temperature greater than 15 ℃ during polar navigation or operation;
The air-conditioning cabin exhaust heat recovery heat exchanger comprises an insulation box body and a first heat exchange coil pipe arranged in the insulation box body, wherein heat transfer medium flows through the first heat exchange coil pipe, and when in heat recovery operation, exhaust air of the air-conditioning cabin flows to the air-conditioning cabin exhaust heat recovery heat exchanger through an air-conditioning cabin exhaust pipe, and the first heat exchange coil pipe recovers waste heat in the exhaust air through the heat transfer medium;
the fresh air inlet heater is arranged at a fresh air inlet of the air conditioner or a fresh air inlet of the cabin and comprises a second heat exchange coil, a heat transfer medium flows through the second heat exchange coil, and when the heat recovery operation is carried out, the heat transfer medium with waste heat recovered in the first heat exchange coil flows to the second heat exchange coil and heats low-temperature outdoor air flowing to the outer surface of the second heat exchange coil;
The antifreeze heat tracing pipe is laid at a device which needs to be frozen on the ship, and a heat-carrying medium is arranged in the antifreeze heat tracing pipe so as to prevent freezing of the corresponding device provided with the antifreeze heat tracing pipe through the heat-carrying medium with waste heat recovered in the first heat exchange coil.
2. The polar vessel cabin air conditioner heat recovery system of claim 1, further comprising:
The anti-freezing liquid circulating pump set comprises a variable-frequency anti-freezing liquid circulating pump, an expansion water tank and a supplementing tank, wherein the anti-freezing liquid circulating pump is controlled by variable frequency and is used for forcedly circulating anti-freezing liquid in a closed pipeline, the variable-frequency speed regulation is carried out on the anti-freezing liquid circulating pump according to a first temperature sensor at a freezing liquid outlet of an air-conditioning cabin exhaust heat recovery heat exchanger so as to regulate the circulating flow, and the expansion water tank and the supplementing tank are used for supplementing the anti-freezing liquid in the closed circulating pipeline;
The first heat exchange coil, the second heat exchange coil and the antifreeze heat tracing pipe are all communicated with the antifreeze circulating pump set.
3. The heat recovery system of a polar vessel cabin air conditioner according to claim 2, wherein,
The second temperature sensor is arranged on the fresh air inlet heater;
The flow regulating valve is arranged on the outlet pipeline of the fresh air inlet heater;
Based on the second temperature sensor and the flow regulating valve, the heat carrier medium flow of the corresponding fresh air inlet heater can be controlled by regulating the flow regulating valve, and then the temperature is controlled.
4. A heat recovery system for a polar vessel cabin air conditioner according to claim 3,
The air-conditioning cabin exhaust pipe comprises an exhaust fan and an exhaust pipeline, and is used for conveying high-heat air in the air-conditioning cabin to the air-conditioning cabin exhaust heat recovery heat exchanger through the air exhaust fan;
the exhaust fan is any one of a pipeline fan, a centrifugal fan or an axial flow fan, and the exhaust pipeline is wrapped with a heat insulation material.
5. The polar vessel cabin air conditioner heat recovery system of claim 4, wherein the fresh air inlet heater further comprises: the filter screen, the water mist removing device, the condensation pipeline and the shell, wherein,
The filter screen is used for primarily filtering outdoor air;
the water mist removing device is used for removing redundant moisture in outdoor humid air and discharging the redundant moisture out of the ship through a condensation pipeline;
the shell is used for fixedly supporting the fresh air inlet heater.
6. The heat recovery system of a polar vessel cabin air conditioner according to claim 5, wherein,
The device for preventing the ship from freezing at least comprises an escape passage plate, an outdoor operation area, a passage plate, an outdoor ladder way, a handrail, an outdoor door and a door frame;
When the plate-shaped anti-freezing device is used, the anti-freezing liquid heat tracing pipe is stuck below the plate-shaped anti-freezing device in a coil shape, and is wrapped and fixed by the heat preservation cotton and the plate-shaped anti-freezing device;
when the tubular anti-freezing device is used, the anti-freezing liquid heat tracing pipe is applied to the outer surface of the tubular anti-freezing device in a spiral line mode along the tubular anti-freezing device, and is wrapped and fixed with the tubular anti-freezing device by using heat insulation cotton.
7. The heat recovery system of a polar vessel cabin air conditioner according to claim 6, wherein,
The air conditioning cabin exhaust heat recovery heat exchanger, the fresh air inlet heater and the antifreeze circulating pump set are connected through pipelines, and the outside of the pipelines is coated with a heat preservation layer and made of corrosion-resistant materials.
8. The heat recovery system of a polar vessel cabin air conditioner according to claim 7,
The heat transfer medium adopts ethylene glycol water or propylene glycol water with set concentration as an antifreezing solution.
9. The heat recovery system of a polar marine cabin air conditioner of claim 8, wherein the heat recovery system of a polar marine cabin air conditioner operates in the following flow chart:
Firstly, warmer air in an air-conditioning cabin is conveyed to an air-conditioning cabin exhaust heat recovery heat exchanger through an air-conditioning cabin exhaust pipe and an exhaust fan thereof, and cabin exhaust gas with higher temperature in the air-conditioning cabin exhaust heat recovery heat exchanger exchanges heat with antifreeze fluid and recovers heat, so that the temperature of the antifreeze fluid is increased;
under the action of an antifreezing solution circulating pump set, the antifreezing solution with higher temperature is pumped to a waste heat utilization device comprising a fresh air inlet heater and an antifreezing solution heat tracing pipe, and the antifreezing solution with higher temperature in the waste heat utilization device heats outdoor fresh air or a device needing freezing prevention, so that the temperature of the outdoor fresh air and the temperature of each antifreezing device are ensured to be heated to be higher than 0 ℃;
after passing through the waste heat utilization device, the antifreeze with higher temperature is reduced to low-temperature antifreeze, and flows back to the air-conditioning cabin exhaust heat recovery heat exchanger for waste heat recovery under the action of the antifreeze circulating pump set, and is circulated back and forth according to the flow.
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|---|---|---|---|
| CN202410300457.8A CN117944864A (en) | 2024-03-15 | 2024-03-15 | Waste heat recovery system of polar region ship cabin air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410300457.8A CN117944864A (en) | 2024-03-15 | 2024-03-15 | Waste heat recovery system of polar region ship cabin air conditioner |
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