CN102147136A - Phase change cold accumulating independent dehumidification floor cold supply system - Google Patents
Phase change cold accumulating independent dehumidification floor cold supply system Download PDFInfo
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Abstract
The invention discloses a phase change cold accumulating independent dehumidification floor cold supply system in the technical field of building environments and equipment engineering. The system comprises two compressors, two condensers, two evaporators, a phase change cold accumulating device, a floor radiation coil pipe, two air blowers, a heat exchanger, an air supply diffuser and an exhaust port. Independent control of temperature and humidity of the cold supply system is realized, the operation is controllable and flexible, and the energy efficiency ratio of a refrigerating unit is improved; effective combination of a phase change cold accumulating technology and a floor radiation cold supply technology is realized, power supply tension is relieved, and the utilization efficiency of electrical energy is improved; reclamation of condensation heat is realized, thermal pollution is relieved, consumption of the electrical energy is reduced, and the working conditions of the condensers are improved; and the purposes of energy conservation and environmental friendliness are finally implemented.
Description
Technical field
What the present invention relates to is a kind of cold supply system of Building Environment and Equipment Engineering technical field, specifically is a kind of floor cold supply system of phase change cold-storage type independent humidity control.
Background technology
The floor radiant cooling technology grows up on the floor heating technical foundation gradually, and its feasibility is more and more authenticated.Have energy-conservation, comfortableness strong, shift the peak value power consumption, be convenient to advantages such as single household control and heat metering.Yet the current floor cold supply system also exist a lot of problems, mainly concentrate on: 1. energy consumption problem: current floor cold supply system and VMC adopt air as Cooling and Heat Source more, adopt the cryogenic freezing water of the temperature of the same race that same refrigeration unit produces to carry out radiation cooling and fresh air dehumidification, make unit eer lower, utilize status thermal source ability, energy utilization rate is low, and operating cost is higher.2. the heating problems again of new wind: new wind wind pushing temperature through dehumidifying after is low excessively, directly sends into indoor meeting and causes the human body discomfort, adopts the heater new wind of heat more at present usually, is cost to consume unnecessary electric energy.
In recent years, along with the high speed development of whole world industry and the change of power structure, refrigeration air-conditioner power consumption constantly increases, and air conditioning energy consumption has accounted for about 15% of national power consumption.China's power supply shortage because air conditioning electricity is concentrated, has increased the weight of the peak power load, and summer is during peak of power consumption, idle call electric weight even reach 40% of cities and towns total electricity consumption.According to the electric power expert introduction, in peak times of power consumption in summer, the power consumption of air-conditioning accounts for 65% of the total electricity consumption of family.Air-conditioning not only power consumption is huge, and its peak of power consumption often with city peak of power consumption overlaid, thereby the imbalance of having aggravated the peak valley power supply makes that the contradiction of peak phase electricity shortage is severe more.At present, still do not have a kind of floor cold supply system can accomplish efficiently to utilize self-energy, improve the unit operation operating mode, reach bigger thermal comfort performance with still less power consumption, this has limited floor air-conditioning applying in the family to a certain extent.Present phase change cold-storage technology is mainly used in the air-conditioning system that conventional electric power drives.The phase transformation that phase change cold-storage typically refers to by phase-change material stores refrigeration plant made cold when the electricity price low ebb, the air-conditioning peak load period part or all of cold is discharged cooling, thereby reach the purpose that reduces the refrigeration installed capacity and save the operation electricity charge.The phase change cold-storage process is similar to constant temperature process, and latent heat of phase change is much bigger than sensible heat, and the volume of cold-storage apparatus is little, is easy to control.
Find through literature search prior art, Chinese patent application number is 200810023234.2, denomination of invention is: based on the handpiece Water Chilling Units and the air-treatment method thereof of the wet independent process of heat, a kind of air-treatment method based on floor radiant cooling and the dehumidifying of accessory fan coil pipe is disclosed, its concrete grammar is that the compressor of handpiece Water Chilling Units has the double suction atmospheric pressure, handpiece Water Chilling Units has two evaporimeters, produce the different temperatures chilled water respectively, first evaporimeter is produced the high temperature chilled water, supply with the flooring radiation coil pipe, be used to bear indoor main refrigeration duty; Second evaporimeter is produced cryogenic freezing water, supplies with the accessory fan coil pipe, is used to bear indoor humidity load and fraction refrigeration duty.This patent mainly is the improvement at the hot wet process of air in floor radiant cooling room, by humidity load in the accessory fan coil pipe decontamination chamber, make the dew-point temperature of room air be lower than floor surface temperature, guarantee that " dewfall " problem does not appear in the floor radiant cooling process.But this method can not solve the energy consumption problem of floor radiant cooling system, still the excess energy that needs to dissipate is the air-supply heating, and because the chilled water of floor coil pipe and fan coil is from same compressor assembly, so still hot wet process can not be separated fully the demand that can't satisfy user's separate refrigeration or dehumidify separately.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of floor cold supply system of phase change cold-storage type independent humidity control be provided, achieve the independent control of cold supply system humiture, operate controlled flexibly, the Energy Efficiency Ratio of raising refrigeration unit; Realize phase change cold-storage technology and the effective combination of floor radiant cooling technology, alleviate power shortage, improve the service efficiency of electric energy; Realize the recovery of condensation heat, alleviate the thermal pollution phenomenon, reduce power consumption, improve the operating mode of condenser; The final purpose that realizes energy-conserving and environment-protective.
The present invention is achieved by the following technical solutions, the present invention includes: two compressors, two condensers, two evaporimeters, phase change cold-storage device, flooring radiation coil pipe, two blower fans, heat exchanger, air-supply air diffuser and exhaust outlets, wherein:
The first input end of output termination first condenser of first compressor, the input of the first output termination first throttle valve of first condenser, the first input end of output termination first evaporimeter of first throttle valve, the input of the first output termination, first compressor of first evaporimeter, the input of the second output termination, first blower fan of first condenser, the first input end of the output termination heat exchanger of first blower fan, second input of the first output termination condenser of heat exchanger, exhaust outlet connects the input of second blower fan, second input of output termination first evaporimeter of second blower fan, second input of the second output termination heat exchanger of first evaporimeter, the second output termination air diffuser of heat exchanger, the input of output termination second condenser of second compressor, the input of output termination second choke valve of second condenser, the first input end of output termination second evaporimeter of second choke valve, the input of the first output termination, second compressor of second evaporimeter, the output of the second input end grounding plate radiant coil of second evaporimeter, the input of the second output termination, first water pump of second evaporimeter, the input of the first output termination, first stop valve of first water pump, the input of the output head grounding plate radiant coil of first stop valve, the input of the second output termination, second stop valve of first water pump, the input of output termination second water pump of second stop valve, the input of the output termination phase change cold-storage device of second water pump, the output of the output head grounding plate radiant coil of phase change cold-storage device.
The working medium that the first input end of described first condenser and first output are carried is cold-producing medium commonly used (as R290), and flow through successively first condenser, first throttle valve, first evaporimeter, the formed closed-loop path of first compressor of cold-producing medium realized first kind of refrigeration cycle;
The air (be about 35 ℃) of the working medium that second input of described first condenser is imported for not heating, the working medium that its second output is exported is the air (being about 45 ℃) after heating.
The working medium that the first input end of described second condenser and first output are carried and working medium realize the approach of kind of refrigeration cycle and first condenser is identical and the refrigerant flow of second condenser greater than first condenser.Title is second kind of refrigeration cycle by the kind of refrigeration cycle that this process realizes.
This device is worked in the following manner: first kind of refrigeration cycle is by first compressor, first condenser, the first throttle valve and first evaporimeter are formed, the operation principle of operation principle and steam compression type refrigeration circulation is in full accord: the beginning of circulation, cold-producing medium is compressed into the gas of HTHP in first compressor, first input end by first condenser enters, the condensation heat release becomes normal temperature high voltage liquid in first condenser tubes, be delivered to the first throttle valve through first output, through the step-down of first throttle valve, become the biphase gas and liquid flow of low-temp low-pressure, first input end from first evaporimeter enters in the evaporimeter again, in pipeline, be vaporized into low-temperature low-pressure refrigerant gas, gas flows back to refrigerant gas and the output that first compressor is compressed into HTHP once again, so move in circles, realized the first kind of refrigeration cycle process, the mobile pressure effect of taking out by first compressor of whole process cold-producing medium provides power.At first evaporimeter, refrigerants vaporize heat absorption produces cold, and this part cold is carried through the wall heat exchange through the air-supply of its second input, output pipeline, the air-supply dehumidifying that is cooled, and the water capacity reduction is sent into indoorly, has realized the processing to indoor humidity load.Indoor return air is sucked airduct from exhaust outlet, in addition airduct is introduced in one new wind air port, certain from the pipeline from outdoor, in the air channel return air with enter evaporimeter after new wind mixes, dehumidifying is cooled in evaporimeter, evaporimeter air-supply after the dehumidifying enters heat exchanger, in heat exchanger with condenser air-supply carrying out heat exchange through condensation heat heating, after the evaporimeter air-supply is warming up to suitable wind pushing temperature (21 ℃), send into indoorly through air diffuser, the temperature of condenser air-supply is transferred back condenser after reducing (approximately to 35 ℃).Second kind of refrigeration cycle is made up of second compressor, second condenser, second choke valve and second evaporimeter, and the endless form of cold-producing medium and phase-state change and first kind of refrigeration cycle are identical between the four big parts, and only refrigerant flow is higher than first kind of refrigeration cycle.In second evaporimeter, the refrigerants vaporize heat absorption produces cold, this part cold is entrained through heat exchange by the chilled water in its second input, the output pipeline, the temperature of chilled water is reduced to 16～18 ℃ by 23～26 ℃ after the heat exchange, send into indoorly as the carrier of cold with the chilled water after the cooling, so realized to indoor cooling.The chilled water that general relatively floor cold supply system is produced, 16～18 ℃ chilled water temperature is higher, so second kind of refrigeration cycle of the present invention can realize the high temperature refrigeration.Open first stop valve, close second stop valve, the chilled water that makes second evaporimeter produce is transported to indoor through the flooring radiation coil pipe, with the human body radiation heat exchange; Open second stop valve, close first stop valve, the chilled water that makes second evaporimeter produce enters the phase change cold-storage device, this moment, the flow direction of chilled water was: chilled water flows to the phase change cold-storage device by second stop valve, chilled water temperature behind the phase-change material released cold quantity is sent back to evaporimeter after raising, phase-change material stores cold with the form of phase transformation, and discharging cold course is the phase-change material released cold quantity, and cold is transported to indoor through the circulation of floor coil pipe water.The flow direction of discharging cold course chilled water is opposite with process of cool: chilled water flows to second stop valve by the phase change cold-storage device.
The present invention has realized combining of independent new wind and floor cooling technology, the refrigeration duty in room summer is effectively separated with humidity load, the refrigerating capacity that second kind of refrigeration cycle is produced passes to chilled water through second evaporimeter and sends into the room, only bear the refrigeration duty in room, and the whole humidity load in room is handled by the cooling and dehumidifying to new wind by the first kind of refrigeration cycle place, first evaporimeter.Such improvement has realized the independence control to temperature and humidity on the one hand, concerning the user, operate more controlled flexible, promptly need not to regulate transition season that temperature only need change humidity or when the room needs new wind, first compressor that the user only need open first kind of refrigeration cycle with cut out the pump mutually, realized saving to electric energy; On the other hand, after the unit separation, the chilled water temperature that the second kind of refrigeration cycle unit is produced is about 16～18 ℃, and this makes the evaporator evaporation temperature improve greatly, thereby improves the operational energy efficiency ratio of the second kind of refrigeration cycle unit, has improved the service efficiency of electric energy; Dehumidifying by first evaporimeter comes humidity load in the decontamination chamber, make the dew-point temperature of room air be lower than floor surface temperature, in the coil pipe of floor, pass to 16～18 ℃ high temperature chilled water, " dewfall " problem does not appear in the basic floor radiant cooling process that guarantees, the present invention adopts phase-change material for cold storage, can produce chilled water summer at night, phase-change material for cold storage stores cold by process of cool, by day, phase-change material for cold storage carries out the endothermic process released cold quantity, cold is sent into indoor by the closed circuit of chilled water.Night with respect to daytime electricity price lower, and night, condensation temperature was low, the refrigeration unit operating condition is better relative daytime, Energy Efficiency Ratio is higher, making full use of low electricity price and high energy efficiency this moment freezes than these two favorable factors and stores, help alleviating power shortage, and improved the service efficiency of electric energy; The present invention reclaims condensation heat, second output at first condenser is provided with a blower fan, introduce heat exchanger by will the be condensed condenser air-supply of heat heating of airduct, in heat exchanger, carry out full heat exchange, waste heat is reclaimed, can alleviate the thermal pollution phenomenon with new wind, full heat exchange with air replaces traditional electric heater to heat air-supply, reduce unnecessary power consumption, reduce the operating temperature of condenser simultaneously, played the effect that improves condensing condition.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, the present embodiment device comprises: first compressor 1, second compressor 2, first condenser 3, second condenser 4, first evaporimeter 5, second evaporimeter 6, phase change cold-storage device 7, flooring radiation coil pipe 8, first blower fan 9, second blower fan 10, heat exchanger 11, air diffuser 12, exhaust outlet 13, first water pump 14 and second water pump 15.Wherein: the first input end 16 of output termination first condenser 3 of first compressor 1, first output 17 of first condenser 3 connects the input of first throttle valve 18, the first input end 19 of output termination first evaporimeter 5 of first throttle valve 18, the input of first output, 20 terminations, first compressor 1 of first evaporimeter 5, second output 21 of first condenser 3 connects the input of first blower fan 9, the first input end 22 of the output termination heat exchanger 11 of first blower fan 9, first output 23 of heat exchanger 11 connects second input 24 of first condenser 3, exhaust outlet 13 connects the input of second blower fan 10, second input 25 of output termination first evaporimeter 5 of second blower fan 10, second output 26 of first evaporimeter 5 connects second input 27 of heat exchange 11 devices, second output 28 of heat exchanger 11 connects air diffuser 12, the input of output termination second condenser 4 of second compressor 2, the input of output termination second choke valve 29 of second condenser 4, the first input end 30 of output termination second evaporimeter 6 of second choke valve 29, first output 31 of second evaporimeter 6 connects the input of second compressor 2, the output of second input, the 32 earth plate radiant coil 8 of second evaporimeter 6, second output 33 of second evaporimeter 6 connects the input of first water pump 14, first output 34 of first water pump 14 connects the input of first stop valve 35, the input of the output head grounding plate radiant coil 8 of first stop valve 35, second output 36 of first water pump 14 connects the input of second stop valve 37, the input of output termination second water pump 15 of second stop valve 37, the input of the output termination phase change cold-storage device 7 of second water pump 15, the output of the output head grounding plate radiant coil 8 of phase change cold-storage device 7.
This device is worked in the following manner: first kind of refrigeration cycle is made up of first compressor 1, first condenser 3, first throttle valve 18 and first evaporimeter 5, and the operation principle of operation principle and steam compression type refrigeration circulation is in full accord.The beginning of circulation, cold-producing medium is compressed into the gas of HTHP in first compressor 1,3 first input ends by first condenser enter, the condensation heat release becomes normal temperature high voltage liquid in first condenser, 3 pipelines, be delivered to 18 step-downs of first throttle valve through first output, become the biphase gas and liquid flow of low-temp low-pressure, first input end from first evaporimeter 5 enters again, in pipeline, be vaporized into low-temperature low-pressure refrigerant gas, gas flows back to refrigerant gas and the output that first compressor 1 is compressed into HTHP once again, so move in circles, realized the first kind of refrigeration cycle process.At first evaporimeter 5, the refrigerants vaporize heat absorption produces cold, and this part cold is carried through the wall heat exchange by the air-supply in its second input, the output pipeline, the dehumidifying that is cooled of blowing, and the water capacity reduction is sent into indoor, has realized the processing to indoor humidity load.Indoor return air is inhaled into airduct from exhaust outlet 13, in addition airduct is introduced in one new wind air port, certain from the pipeline from outdoor, in the air channel with after new wind mixes, enter first evaporimeter 5, dehumidifying is cooled in first evaporimeter 5, evaporimeter air-supply after the dehumidifying enters heat exchanger 11, in heat exchanger 11 with condenser air-supply carrying out heat exchange through condensation heat heating, evaporimeter air-supply is warming up to suitable wind pushing temperature (21 ℃) after air diffuser 12 is sent into indoorly with suitable wind speed, is transferred back first condenser 3 after the temperature of condenser air-supply reduces.Second kind of refrigeration cycle is made up of second compressor 2, second condenser 4, second choke valve 29 and second evaporimeter 6, the endless form of cold-producing medium and phase-state change and first kind of refrigeration cycle are identical between the four big parts, and only refrigerant flow is higher than first kind of refrigeration cycle.In second evaporimeter 6, the refrigerants vaporize heat absorption produces cold, this part cold is entrained through heat exchange by the chilled water in its second input, the output pipeline, the temperature of chilled water is reduced to 16～18 ℃ by 23～26 ℃ after the heat exchange, send into indoorly as the carrier of cold with the chilled water after the cooling, so realized to indoor cooling.Open first stop valve 36, close second stop valve 38, the chilled water that makes second evaporimeter 6 produce is transported to indoor through flooring radiation coil pipe 8, with the human body radiation heat exchange; Open second stop valve 38, close first stop valve 36, the chilled water that makes second evaporimeter 6 produce enters phase change cold-storage device 7, chilled water is sent back to second evaporimeter 6 after temperature raises behind the phase-change material released cold quantity, phase-change material stores cold with the form of phase transformation, discharging cold course is the phase-change material released cold quantity, and cold is transported to indoor through the circulation of floor coil pipe 8 water.
General floor cold supply system is only produced cooling water by a wind-cooled cold-water unit at present.In summer, unit provides 7 ℃ cold water to send into air-conditioned room, and it provides fresh air dehumidification required low-temperature cold water on the one hand, provides the room refrigeration required cryogenic energy on the one hand, is typical humiture one treatment system.7 ℃ of cold water that unit provides because of the reason of human comfort and indoor dewfall can not directly be sent into indoor ground coil pipe, need be elevated to 16～18 ℃ with the backwater mixing temperature and just can send into indoorly, and hot and cold water mixes and to have caused a part of available energy loss; Air-supply is dehumidified at low temperatures, but the thermal stratification characteristic of cold wind of directly sending into and workspace may cause that human body is uncomfortable, therefore also need electric heater to the further heating-up temperature of air be elevated to just can send into more than 20 ℃ indoor.From the summer operation process of general floor radiant cooling system as can be seen, unit has spent the cryogenic freezing water that big electric energy obtains, and the refrigeration unit evaporating temperature is low, and coefficient of refrigerating performance only is 3～4.The high-quality energy of producing but can not directly utilize, through with just can send into mixing of backwater indoorly, so comprised the irreversible loss of energy in heat transfer process again, energy loss is bigger.In addition, air-supply also is the no small energy consumption in a place with the hot again heat that adds of electric heater.
The present invention is remarkable with respect to floor radiant cooling energy saving of system superiority in the past, is mainly reflected in:
1, independence control theory in greenhouse is combined with the floor radiant cooling system.With the humidity in room with temperature is given first kind of refrigeration cycle respectively and second kind of refrigeration cycle is independently controlled, make the second kind of refrigeration cycle evaporating temperature be improved on the one hand, effectively improve unit coefficient of refrigerating performance (as with R290 as cold-producing medium, with 18 ℃ is evaporating temperature, with 50 ℃ is the cold energy temperature, the COP that calculates the second kind of refrigeration cycle unit can reach 5.24, and the general relatively COP of floor radiant cooling system is 3～4 much higher); Avoid hot and cold water to mix the available energy that causes on the other hand and lost, thereby improved energy utilization rate greatly.
2, to the concentrated recovery of condenser heat and the heating again that is used for blowing.The heat that general floor radiant cooling system refrigeration unit condenser produces all spills into external environment, causes thermal pollution; With electric heater is air-supply heat again, has additionally increased expending of electric energy.The present invention is improved original system, and condensation heat is reclaimed in order to air-supply heating again, has substituted the discharging of low-phase energy and the unnecessary consumption of the high-order energy with the recycling of low-grade energy, has solved above-mentioned two problems simultaneously, avoids thermal pollution, reduces energy consumption.
3, utilize phase-change material for cold storage to store cold, effectively utilize low price electric energy at night, improve the economy of system.Can effectively improve simultaneously the evaporating temperature and the COP value of refrigeration unit, thereby improve the energy utilization efficiency of system.
Claims (4)
1. the floor cold supply system of a phase change cold-storage type independent humidity control comprises: two compressors, two condensers, two evaporimeters, phase change cold-storage device, flooring radiation coil pipe, two blower fans, heat exchanger, air-supply air diffuser and exhaust outlets is characterized in that:
The first input end of output termination first condenser of first compressor, the input of the first output termination first throttle valve of first condenser, the first input end of output termination first evaporimeter of first throttle valve, the input of the first output termination, first compressor of first evaporimeter, the input of the second output termination, first blower fan of first condenser, the first input end of the output termination heat exchanger of first blower fan, second input of the first output termination condenser of heat exchanger, exhaust outlet connects the input of second blower fan, second input of output termination first evaporimeter of second blower fan, second input of the second output termination heat exchanger of first evaporimeter, the second output termination air diffuser of heat exchanger, the input of output termination second condenser of second compressor, the input of output termination second choke valve of second condenser, the first input end of output termination second evaporimeter of second choke valve, the input of the first output termination, second compressor of second evaporimeter, the output of the second input end grounding plate radiant coil of second evaporimeter, the input of the second output termination, first water pump of second evaporimeter, the input of the first output termination, first stop valve of first water pump, the input of the output head grounding plate radiant coil of first stop valve, the input of the second output termination, second stop valve of first water pump, the input of output termination second water pump of second stop valve, the input of the output termination phase change cold-storage device of second water pump, the output of the output head grounding plate radiant coil of phase change cold-storage device.
2. the floor cold supply system of phase change cold-storage type independent humidity control according to claim 1, it is characterized in that, the working medium that the first input end of described first condenser and first output are carried is cold-producing medium commonly used, and flow through successively first condenser, first throttle valve, first evaporimeter, the formed closed-loop path of first compressor of cold-producing medium realized first kind of refrigeration cycle.
3. the floor cold supply system of phase change cold-storage type independent humidity control according to claim 1 is characterized in that, the air of the working medium that second input of described first condenser is imported for not heating, and the working medium that its second output is exported is the air after heating.
4. the floor cold supply system of phase change cold-storage type independent humidity control according to claim 1, it is characterized in that, the working medium that the first input end of described second condenser and first output are carried and working medium realize the approach of kind of refrigeration cycle and first condenser is identical and the refrigerant flow of second condenser greater than first condenser.Title is second kind of refrigeration cycle by the kind of refrigeration cycle that this process realizes.
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| CN115654647A (en) * | 2022-10-26 | 2023-01-31 | 珠海格力电器股份有限公司 | Air conditioning system, control method and device thereof, storage medium and electronic equipment |
| CN115654647B (en) * | 2022-10-26 | 2024-05-03 | 珠海格力电器股份有限公司 | Air conditioning system, control method and device thereof, storage medium and electronic equipment |
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Application publication date: 20110810 |