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A direct expansion seawater source heat pump/free cooling and heating system for ships

A direct expansion, source heat pump technology, applied in heating systems, hot water central heating systems, household heating, etc., can solve the problem of insufficient use of ship waste heat, high material requirements for heat pump systems, and lack of structure and material design, etc. problems, to achieve the effect of reducing intermediate water and terminal water circulation system, good economy and low cost

Active Publication Date: 2019-10-11
大连日嘉低碳新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the residual heat of the ship is not fully utilized, and the equipment of the terminal air-conditioning water system and the intermediate water system are heavy, which increases the load on the ship
[0005] The patent application number is 201410532794.6, which discloses a high-efficiency marine seawater source heat pump air conditioning system and its control method, which makes full use of the waste heat of the ship, and the system does not consider when the quality of cold and heat sources of seawater and waste heat can meet the requirements of space cooling and heat quality How to realize "free" cooling, heating and low energy consumption mode
And there is no structural and material design of the seawater-refrigerant heat exchanger for the seawater corrosion problem, which is the key to the safe and economical operation of the seawater source heat pump
[0006] The patent application number is 201310090483.4, which discloses a direct contact seawater source heat pump. In the seawater-refrigerant heat exchanger, the seawater is in direct contact with the refrigerant. There is a risk that the refrigerant will bring ions in the seawater into the heat pump system, affecting The service life of the compressor, etc., has high requirements on the materials of the heat pump system, and the cost is high

Method used

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  • A direct expansion seawater source heat pump/free cooling and heating system for ships
  • A direct expansion seawater source heat pump/free cooling and heating system for ships
  • A direct expansion seawater source heat pump/free cooling and heating system for ships

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as Figure 1-4 The shown direct expansion seawater source heat pump / free cooling and heating system for ships mainly includes compressor 1, indoor fan coil unit 2, throttle valve 3, direct expansion heat exchanger 4, first Four-way valve 5, first check valve 6, second check valve 7, second four-way valve 8, third check valve 9, fourth check valve 10, sea water pump 11, first three-way valve 12 , a fuel generator waste heat recovery heat exchanger 13 , a second three-way valve 14 , a refrigerant circulation pump 15 , a third three-way valve 16 and a fourth three-way valve 17 .

[0029] Among them, the seawater pump 11 and the waste heat recovery heat exchanger 13 of the fuel oil generator are the equipments that general ships possess (such as Figure 1-4 The part inside the dashed box in middle B). And we only need to introduce the seawater that is usually used to cool the fuel generator and the engine into the special direct expansion heat exchanger 4 for marine ...

Embodiment 2

[0034] This embodiment is the winter compressor operation mode of the system.

[0035] The operating mode of the compressor in winter is as follows: Turn on the compressor 1, bypass the refrigerant pump 15 through the three-way valve 16 and the three-way valve 17, and the refrigerant will work on it through the compressor 1 to boost the temperature and become a high-temperature and high-pressure gas. The four-way valve 5 (opens the upper left channel, that is, its c and d ports are connected) and then passes through the indoor fan coil 2 to condense and release heat to become an isothermal and isobaric liquid, passes through the first check valve 6 and then passes through the throttle valve 3 for etc. The enthalpy lowers the temperature and pressure to become a low-temperature and low-pressure liquid, then passes through the second check valve 7 (the third check valve 9 and the fourth check valve 10 are closed), and passes through the second four-way valve 8 (opening the upper ...

Embodiment 3

[0037] This embodiment is the free heating mode of the system in winter.

[0038] The free heating operation mode in winter is as follows: Turn on the refrigerant pump 15, bypass the compressor 1 through the third three-way valve 16 and the fourth three-way valve 17, and the refrigerant provides circulating power flow through the refrigerant pump 15, and passes through the first The four-way valve 5 (opens the upper left channel, that is, its c and d ports are connected) and then passes through the indoor fan coil 2 to release heat to increase the indoor temperature, and then passes through the first check valve 6 and the throttle valve 3 (at this time, the throttle valve is full). open) and the second check valve 7 (the third check valve 9 and the fourth check valve 10 are closed), pass through the second four-way valve 8 (open the upper left channel, that is, its c', d' ports are connected) and then pass through Direct expansion heat exchanger 4 dedicated to ship seawater di...

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PUM

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Abstract

The invention relates to the field of energy source recycling, particularly to a seawater source heating and refrigerating combined system used for ships, and preferably to a direct-expansion seawater source heat pump free cooling and heating system used for ships. The direct-expansion seawater source heat pump free cooling and heating system used for ships is characterized in that when low-level cold and heat sources are insufficient, the energy source quality is improved through the heat pump technology to cool and heat the inner spaces of ships; when low-level cold and heat sources are sufficient, a heat pump compressor is bypassed, all throttle valves are opened, a refrigerating fluid circulating pump is opened, the refrigerating fluid performs heat exchange with low-level heat sources through direct expansion so as to realize free cooling and heating of the ships; moreover, a direct-expansion heat exchanger in the system is used for extracting cold and heat energy from low-level cold and heat sources, the shell of the direct-expansion heat exchanger is made from PVC plastics, a coil pipe is a copper pipe coated with an anticorrosive material, intermediate water and tail end water circulation systems in the conventional system are reduced, and the weight of ships selves is reduced; besides, the system has the advantages of energy conservation, environmental protection and good economy, can be easily connected with equipment of ships, and further has energy conservation and environmental protection practical significances.

Description

technical field [0001] The invention relates to the field of energy recovery and utilization, in particular to a seawater source heating and refrigeration combined system for ships. Background technique [0002] Energy is the material basis for human survival and development. The current scarcity of energy and the irreversibility of environmental pollution have made countries around the world pay more attention to energy and environmental issues. Heat pump technology can effectively improve the quality of low-grade heat sources in nature, meet the needs of buildings and processes for cooling and heat, rationally and effectively use renewable energy and waste energy, and control the rate of entropy increase in nature. Has developed by leaps and bounds. The seawater source heat pump system is a kind of surface water source heat pump system. The ocean accounts for 71% of the earth's surface. It is a huge renewable energy reservoir and is very suitable for low-temperature heat ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B13/00F24F5/00F24D3/18
Inventor 贾欣
Owner 大连日嘉低碳新能源科技有限公司