CN1916512A - Air condition system by using latent energy of exhaustion to retrieve liquid and extract moisture - Google Patents
Air condition system by using latent energy of exhaustion to retrieve liquid and extract moisture Download PDFInfo
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Abstract
本发明公开了一种排风潜能回收液体除湿空调系统，它包括水循环子系统，溶液再生循环子系统，空气循环子系统。本发明为保证该系统能提供适合房间空调温度的送风条件，对空调排风所蓄能量实行回收，对空调排风经过喷淋加湿降温处理，并使喷淋水得到冷却。用加湿降温后的空气冷却循环溶液，提高溶液对空气的吸湿能力；用冷却水冷却经吸湿处理后的空调送风空气，使空气处于降低的含湿量和干球温度。送风空气等焓加湿可以直接处理到空调要求的20℃以下，满足空调的送风温度要求，不需要附加压缩式制冷机组，可以直接服务于空调系统。
The invention discloses a liquid dehumidification air-conditioning system for recovering exhaust potential energy, which comprises a water circulation subsystem, a solution regeneration circulation subsystem and an air circulation subsystem. In order to ensure that the system can provide air supply conditions suitable for room air-conditioning temperature, the invention recovers the energy stored in the air-conditioning exhaust, sprays, humidifies and cools the air-conditioning exhaust, and cools the spray water. Cool the circulating solution with humidified and cooled air to improve the moisture absorption capacity of the solution to the air; use cooling water to cool the air-conditioning air after moisture absorption treatment, so that the air is at a reduced moisture content and dry bulb temperature. The constant enthalpy humidification of supply air can be directly processed to below 20°C required by the air conditioner, meeting the supply air temperature requirements of the air conditioner, without additional compression refrigeration units, and can directly serve the air conditioner system.
Description
技术领域Technical field
本发明涉及一种空调系统，特别涉及一种排风潜能回收液体除湿空调系统。The invention relates to an air-conditioning system, in particular to a liquid dehumidification air-conditioning system for recovering exhaust potential energy.
背景技术 Background technique
除湿空调系统的基本工作原理是干燥剂除湿和蒸发冷却，可以实现潜热、显热负荷分别处理，在干热、热湿气候地区用作空调系统，具有很强的经济性和实用性。传统蒸汽压缩式空调具有传热效率高、结构紧凑，技术成熟和使用方便等优点；不足之处是耗电量大，在处理潜热负荷时需要过冷，使能量消耗大大增加。液体除湿空调装置能够独立除湿，把除湿和降温过程分开，从而使温度较高的冷源就能对空气处理，通过水冷却、空调排风冷却、等焓加湿冷却等，把处理空气冷却至空调送风状态，不在附加压缩式制冷机组进行冷却，保证空调送风温度达到房间空调的要求。李震等在《暖通空调》2003年第33卷第6期上发表的“溶液除湿空调及热湿独立处理空调系统”。该装置由液体除湿器、再生器和压缩制冷装置构成，实现了热湿独立处理。国外K.Gommed和G.Grossman在《Journal ofsolar energy engineering》2004年126(8)上发表的“A Liquid DesiccantSystem for Solar Cooling and Dehumi dification”一文，也提出了液体除湿用于空调系统。但它们都需要常规的压缩制冷装置对除湿系统进行热湿处理后的空气进一步冷却。The basic working principle of the desiccant air-conditioning system is desiccant dehumidification and evaporative cooling, which can realize the separate treatment of latent heat and sensible heat load. It is used as an air-conditioning system in dry heat and hot humid climate areas, and has strong economy and practicability. The traditional vapor compression air conditioner has the advantages of high heat transfer efficiency, compact structure, mature technology and convenient use; the disadvantage is that it consumes a lot of power, and it needs to be supercooled when dealing with latent heat load, which greatly increases energy consumption. The liquid dehumidification air-conditioning device can independently dehumidify, separate the dehumidification and cooling process, so that the cold source with a higher temperature can process the air, and cool the processed air to the air conditioner through water cooling, air conditioning exhaust cooling, isenthalpy humidification and cooling, etc. In the air supply state, the additional compression refrigeration unit is not used for cooling to ensure that the air supply temperature of the air conditioner meets the requirements of the room air conditioner. "Solution dehumidification air-conditioning and heat-humidity independent processing air-conditioning system" published by Li Zhen et al. The device is composed of a liquid dehumidifier, a regenerator and a compression refrigeration device, which realizes the independent treatment of heat and humidity. Foreign K.Gommed and G.Grossman published "A Liquid Desiccant System for Solar Cooling and Dehumi dification" in "Journal of solar energy engineering" 126 (8) in 2004, which also proposed liquid dehumidification for air conditioning systems. But they all need conventional compression refrigeration equipment to further cool the air after the heat and moisture treatment of the dehumidification system.
发明内容Contents of the invention
本发明是要解决现有液体除湿空调存在的上述技术问题，提供一种排风潜能回收液体除湿空调装置。该装置不但可去除空调系统处理空气的潜热负荷并利用空调排风的潜能回收，除去空调系统处理空气的显热部分，达到空调要求的送风状态，避免传统CFC制冷系统带来的臭氧层破坏、温室效应等问题，具有较高的综合能源利用效率。The present invention aims to solve the above-mentioned technical problems existing in the existing liquid dehumidification air conditioner, and provides a liquid dehumidification air conditioner with exhaust potential recovery. This device can not only remove the latent heat load of the air-conditioning system, but also use the potential recovery of the air-conditioning exhaust, remove the sensible heat of the air-conditioning system, achieve the air supply state required by the air conditioner, and avoid the destruction of the ozone layer caused by the traditional CFC refrigeration system. Greenhouse effect and other issues, with high comprehensive energy utilization efficiency.
为实现上述目的，本发明采用的技术方案如下：To achieve the above object, the technical scheme adopted in the present invention is as follows:
一种排风潜能回收液体除湿空调系统，包括水循环子系统，溶液循环子系统，空气循环子系统。A liquid dehumidification air-conditioning system with exhaust potential recovery, including a water circulation subsystem, a solution circulation subsystem, and an air circulation subsystem.
空气循环处理子系统包括：除湿塔、表冷器、送风加湿器、排风加湿器、空气溶液换热器、再生塔；The air circulation treatment subsystem includes: dehumidification tower, surface cooler, supply air humidifier, exhaust air humidifier, air solution heat exchanger, regeneration tower;
其中，除湿塔进风口与室外连接，出风口与表冷器进风口连接；送风加湿器进风口与表冷器连接，出风口与空调房间进风口相连；排风加湿器进风口与空调房间排风口相连，出风口与空气溶液换热器连接；再生塔进风口与空气溶液换热器出风口连接，出风口与室外相通；Among them, the air inlet of the dehumidification tower is connected to the outdoor, and the air outlet is connected to the air inlet of the surface cooler; the air inlet of the supply air humidifier is connected to the surface cooler, and the air outlet is connected to the air inlet of the air-conditioned room; the air inlet of the exhaust humidifier is connected to the air-conditioned room The exhaust port is connected, and the air outlet is connected to the air solution heat exchanger; the air inlet of the regeneration tower is connected to the air outlet of the air solution heat exchanger, and the air outlet is connected to the outside;
水循环子系统包括：冷水箱、送风加湿器、排风加湿器、表冷器；The water circulation subsystem includes: cold water tank, supply air humidifier, exhaust air humidifier, surface cooler;
其中，冷水箱出水口分别与送风加湿器、排风加湿器入水口连接；送风加湿器、排风加湿器出水口与表冷器的进水口相连；表冷器的出水口与冷水箱的进水口相连；Among them, the water outlet of the cold water tank is connected to the water inlet of the air supply humidifier and the exhaust air humidifier respectively; the water outlets of the air supply humidifier and the exhaust air humidifier are connected to the water inlet of the surface cooler; connected to the water inlet;
溶液循环子系统包括：溶液箱、溶液冷却塔、溶液加热器、空气溶液换热器、再生塔、除湿塔；The solution circulation subsystem includes: solution tank, solution cooling tower, solution heater, air solution heat exchanger, regeneration tower, dehumidification tower;
其中，空气溶液换热器的溶液出口与除湿塔溶液进口连接，另一端与溶液冷却塔连接；溶液冷却塔的溶液进口与溶液箱连接，溶液箱的溶液进口与除湿塔的溶液出口连接，形成溶液除湿回路；溶液加热器的溶液进口和与溶液箱的另一溶液出口连接，出口与再生塔溶液入口连接，再生塔的溶液出口与溶液加热器连接，形成一个溶液再生回路。Wherein, the solution outlet of the air solution heat exchanger is connected with the solution inlet of the dehumidification tower, and the other end is connected with the solution cooling tower; the solution inlet of the solution cooling tower is connected with the solution tank, and the solution inlet of the solution tank is connected with the solution outlet of the dehumidification tower, forming Solution dehumidification circuit; the solution inlet of the solution heater is connected to another solution outlet of the solution tank, the outlet is connected to the solution inlet of the regeneration tower, and the solution outlet of the regeneration tower is connected to the solution heater to form a solution regeneration circuit.
送风加湿器和排风加湿器均包括：喷淋器、蜂窝状湿膜材料，喷淋器位于蜂窝状湿膜材料上方。Both the supply air humidifier and the exhaust air humidifier include: a sprayer and a honeycomb wet film material, and the sprayer is located above the honeycomb wet film material.
溶液冷却塔一端和溶液箱连接，另一端和空气溶液换热器连接，溶液冷却塔为闭式空气冷却塔。One end of the solution cooling tower is connected to the solution tank, and the other end is connected to the air solution heat exchanger. The solution cooling tower is a closed air cooling tower.
溶液加热器的热源是75℃左右的太阳能或低温余热提供的热水。The heat source of the solution heater is hot water provided by solar energy or low-temperature waste heat at about 75°C.
溶液再生循环子系统所用溶液为盐水。The solution used in the solution regeneration circulation subsystem is brine.
本发明充分发挥了液体除湿空调热湿负荷单独处理的优点，利用盐水(如LiCl溶液等)除湿塔处理潜热负荷，以房间排风经过直接蒸发冷却后产生的冷水处理吸湿后空气的显热负荷，而且排风空气加湿后温度降低，被用来冷却除湿塔的进口溶液温度，增强除湿溶液的吸湿效果，进一步降低除湿塔的出口空气温度和含湿量，为空调送风空气等焓加湿后达到空调房间所要求的温度提供保证。充分利用了空调排风的潜能，降低了送风温度和通风量，充分满足除湿和降温两个方面的要求，且泵和风机的耗电量大为减小，热源可用温度为75℃左右的废热或太阳能对盐水溶液再生，具有良好的节能效果。在室外空气干球温度34℃、湿球温度28℃的条件下，送风空气可以达到干球温度19℃、相对湿度90％，满足空调的送风要求。加湿器和表冷器的引入，也避免了传统间接蒸发冷却器中空气—空气换热器传热效率低、体积过大的缺点，对处理空气的降温发挥了重要作用，它们和除湿塔一起，改变了空气处理后送风的温湿度，使其能够达到空调送风的要求。使用的除湿盐水对空气有杀菌、除尘的作用，对空气品质要求高的场合(如医院等)特别适用。The present invention fully utilizes the advantages of separate treatment of heat and humidity loads of liquid dehumidification air conditioners, utilizes a salt water (such as LiCl solution, etc.) dehumidification tower to process latent heat loads, and uses room exhaust air to produce cold water after direct evaporative cooling to treat sensible heat loads of moisture-absorbed air , and the temperature of the exhaust air decreases after humidification, which is used to cool the temperature of the inlet solution of the dehumidification tower, enhance the moisture absorption effect of the dehumidification solution, further reduce the outlet air temperature and moisture content of the dehumidification tower, and humidify the air supply air of the air conditioner after equal enthalpy Provides assurance that the temperature required for air-conditioned rooms is achieved. Make full use of the exhaust potential of the air conditioner, reduce the air supply temperature and ventilation volume, fully meet the requirements of dehumidification and cooling, and the power consumption of pumps and fans is greatly reduced, and the available temperature of the heat source is about 75 ℃ Waste heat or solar energy regenerates the brine solution, which has a good energy-saving effect. Under the conditions of outdoor air dry bulb temperature 34°C and wet bulb temperature 28°C, the supply air can reach a dry bulb temperature of 19°C and a relative humidity of 90%, meeting the air supply requirements of the air conditioner. The introduction of humidifiers and surface coolers also avoids the shortcomings of low heat transfer efficiency and large volume of air-air heat exchangers in traditional indirect evaporative coolers, and plays an important role in cooling the treated air. Together with the dehumidification tower , Change the temperature and humidity of the air supply after air treatment, so that it can meet the requirements of air conditioning air supply. The dehumidified salt water used has the effect of sterilizing and dedusting the air, and is especially suitable for occasions with high air quality requirements (such as hospitals, etc.).
本发明将通过具体实施和附图对系统进一步说明。The present invention will further illustrate the system through specific implementation and accompanying drawings.
附图说明Description of drawings
图1是本发明的系统结构图。Fig. 1 is a system structure diagram of the present invention.
具体实施方式 Detailed ways
如图1所示，一种排风潜能回收液体除湿空调系统由空气循环子系统，水循环子系统和溶液循环子系统构成。As shown in Figure 1, a liquid dehumidification air conditioning system with exhaust potential recovery consists of an air circulation subsystem, a water circulation subsystem and a solution circulation subsystem.
空气循环处理子系统包括：除湿塔1、表冷器2、送风加湿器3、排风加湿器5、空气溶液换热器6、再生塔7；The air circulation treatment subsystem includes: dehumidification tower 1, surface cooler 2, supply air humidifier 3, exhaust air humidifier 5, air solution heat exchanger 6, regeneration tower 7;
其连接关系为：除湿塔1进风口和室外连接，出风口和表冷器2进风口连接；送风加湿器3进风口和表冷器2连接，出风口和空调房间进风口相连；排风加湿器5进风口和空调房间排风口相连，出风口和空气溶液换热器6连接；再生塔7进风口和空气溶液换热器6出风口连接，出风口和室外相通；The connection relationship is: the air inlet of the dehumidification tower 1 is connected to the outdoor, the air outlet is connected to the air inlet of the surface cooler 2; the air inlet of the humidifier 3 is connected to the surface cooler 2, and the air outlet is connected to the air inlet of the air-conditioning room; The air inlet of the humidifier 5 is connected to the air outlet of the air-conditioned room, and the air outlet is connected to the air solution heat exchanger 6; the air inlet of the regeneration tower 7 is connected to the air outlet of the air solution heat exchanger 6, and the air outlet is connected to the outside;
从室外经过过滤处理的新风作为空调送风，经过除湿塔1除湿，然后经过表冷器2降温和送风加湿器3等焓加湿降温，然后送入房间4；房间4排风经过排风加湿器5加湿，湿度升高、温度下降，降温后的排风经过空气溶液冷却器6对溶液进一步降温冷却，然后排风再作为再生空气进入再生塔7，最后湿热的空气排放到大气中。The fresh air filtered from the outside is used as the air supply of the air conditioner, dehumidified by the dehumidification tower 1, then cooled by the surface cooler 2 and humidified and cooled by the air supply humidifier 3, and then sent to room 4; the exhaust air of room 4 is humidified by the exhaust air The device 5 humidifies, the humidity rises, and the temperature drops. The exhaust air after cooling passes through the air solution cooler 6 to further cool down the solution, and then the exhaust air enters the regeneration tower 7 as regeneration air, and finally the hot and humid air is discharged into the atmosphere.
水循环子系统包括：冷水箱11、送风加湿器3、排风加湿器5、表冷器2；The water circulation subsystem includes: cold water tank 11, supply air humidifier 3, exhaust air humidifier 5, surface cooler 2;
其连接关系为：冷水箱11出水口分别和送风加湿器3、排风加湿器5入水口连接；送风加湿器3、排风加湿器5出水口和表冷器2的进水口相连；表冷器2的出水口和冷水箱11的进水口相连；The connection relationship is as follows: the water outlet of the cold water tank 11 is respectively connected to the water inlet of the air supply humidifier 3 and the exhaust air humidifier 5; the water outlet of the air supply humidifier 3 and the exhaust air humidifier 5 are connected to the water inlet of the surface cooler 2; The water outlet of the surface cooler 2 is connected with the water inlet of the cold water tank 11;
冷水箱的水分别进入送风加湿器和排风加湿器，加湿后水的水温降低，利用加湿后的低温冷却水和除湿塔出来的送风在表冷器内换热，空气等湿降温；表冷器中温度升高的冷却水流回冷水箱，再进入送风加湿器和排风加湿器加湿降温，如此循环。由于加湿空气，冷水箱需要进行少量的补水。The water in the cold water tank enters the supply air humidifier and the exhaust air humidifier respectively. After humidification, the water temperature of the water decreases, and the humidified low-temperature cooling water and the supply air from the dehumidification tower are used to exchange heat in the surface cooler, and the air is cooled by humidity; The cooling water whose temperature rises in the surface cooler flows back to the cold water tank, and then enters the supply air humidifier and the exhaust air humidifier for humidification and cooling, and so on. The cold water tank requires a small amount of rehydration due to humidifying the air.
溶液循环子系统包括：溶液箱9、溶液冷却塔10、溶液加热器8、空气溶液换热器6、再生塔7、除湿塔1；The solution circulation subsystem includes: a solution tank 9, a solution cooling tower 10, a solution heater 8, an air solution heat exchanger 6, a regeneration tower 7, and a dehumidification tower 1;
其连接关系为：空气溶液换热器6的溶液出口和除湿塔1溶液进口连接，另一端和溶液冷却塔10连接；溶液冷却塔10的溶液进口和溶液箱9连接，溶液箱9的溶液进口和除湿塔1的溶液出口连接，形成溶液除湿回路；溶液加热器8的溶液进口和溶液箱9的另一溶液出口连接，出口和再生塔7溶液入口连接，再生塔7的溶液出口和溶液加热器8连接，形成一个溶液再生回路。The connection relationship is: the solution outlet of the air solution heat exchanger 6 is connected to the solution inlet of the dehumidification tower 1, and the other end is connected to the solution cooling tower 10; the solution inlet of the solution cooling tower 10 is connected to the solution tank 9, and the solution inlet of the solution tank 9 It is connected with the solution outlet of the dehumidification tower 1 to form a solution dehumidification circuit; the solution inlet of the solution heater 8 is connected with another solution outlet of the solution tank 9, the outlet is connected with the solution inlet of the regeneration tower 7, and the solution outlet of the regeneration tower 7 is connected with the solution heating Device 8 is connected to form a solution regeneration loop.
溶液冷却塔10一端和溶液箱9相连，另一端和空气溶液换热器6相连，空气溶液换热器6另一端和除湿塔1相连，除湿塔1另一端和溶液箱9相连，形成一个除湿回路。浓溶液进入除湿塔1对空气除湿后变成稀溶液，进入溶液箱9。溶液加热器8一端和溶液箱9相连接，另一端和再生塔7连接，溶液箱9和再生塔7相连接，形成一个再生回路。低温的稀溶液经过溶液加热器后温度升高，通过连接管进入再生塔7，在塔7内和再生空气间传热传质，溶液降温去湿变成浓溶液进入溶液箱9。One end of the solution cooling tower 10 is connected to the solution tank 9, the other end is connected to the air solution heat exchanger 6, the other end of the air solution heat exchanger 6 is connected to the dehumidification tower 1, and the other end of the dehumidification tower 1 is connected to the solution tank 9 to form a dehumidification system. circuit. The concentrated solution enters the dehumidification tower 1 to become a dilute solution after dehumidifying the air, and then enters the solution tank 9. One end of the solution heater 8 is connected to the solution tank 9, the other end is connected to the regeneration tower 7, and the solution tank 9 is connected to the regeneration tower 7 to form a regeneration loop. The temperature of the low-temperature dilute solution rises after passing through the solution heater, and enters the regeneration tower 7 through the connecting pipe, and transfers heat and mass between the tower 7 and the regeneration air.
处理空气在除湿塔1去除潜热，然后送入表冷器2。送风加湿器3和排风加湿器5在加湿空气的同时，喷淋水自身得到冷却，降温后的冷却水进入表冷器2冷却除湿塔1出来的送风，去除处理空气的显热。喷淋器、蜂窝状湿膜材料，喷淋器位于蜂窝状湿膜材料上方。The process air removes latent heat in the dehumidification tower 1, and then sends it to the surface cooler 2. The air supply humidifier 3 and the exhaust air humidifier 5 humidify the air while the spray water itself is cooled, and the cooled cooling water enters the surface cooler 2 to cool the air supply from the dehumidification tower 1 to remove the sensible heat of the treated air. Sprayer, honeycomb wet film material, the sprinkler is located above the honeycomb wet film material.
经排风加湿器加湿后的排风，温度降低，可对进入除湿塔1的溶液进一步降温，提高溶液吸湿能力。溶液加热器8的热源是75℃左右的太阳能或低温余热提供的热水。The temperature of the exhaust air humidified by the exhaust air humidifier is lowered, which can further cool down the solution entering the dehumidification tower 1 and improve the moisture absorption capacity of the solution. The heat source of the solution heater 8 is hot water provided by solar energy or low-temperature waste heat at about 75°C.
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