CN103629769A - Integration device of solar central air conditioning system and heat exchange method - Google Patents

Integration device of solar central air conditioning system and heat exchange method Download PDF

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CN103629769A
CN103629769A CN201310659208.XA CN201310659208A CN103629769A CN 103629769 A CN103629769 A CN 103629769A CN 201310659208 A CN201310659208 A CN 201310659208A CN 103629769 A CN103629769 A CN 103629769A
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water
solar
solar energy
pump
central air
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CN103629769B (en
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沈天昱
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沈天昱
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Abstract

The invention relates to a solar utilization technology and aims at providing an integration device of a solar central air conditioning system and a heat exchange method. The integration device comprises a solar vacuum tube heat collection device and a lithium bromide absorption refrigeration unit which form a hot water loop by virtue of a pipeline, wherein a fan coil and the lithium bromide absorption refrigeration unit form a chilled water loop by virtue of a pipeline; a water storage tank and the fan coil form a water cooling loop by virtue of a pipeline. The integration device is characterized by further comprising a solar water heater, wherein the solar vacuum tube heat collection device, the solar water heater and the lithium bromide absorption refrigeration unit are sequentially connected by virtue of pipelines.The integration device has the advantages that the solar water heater is integrated on the solar central air conditioning system, so that hot water generated by the solar vacuum tube heat collection device is reheated so as to efficiently meet the refrigeration temperature of the lithium bromide absorption refrigeration unit and improve the solar energy utilization efficiency of the whole system.

Description

Solar energy central air-conditioning system integrating device and heat-exchange method
Technical field
The present invention relates to solar utilization technique, particularly utilize solar energy central air-conditioning system integrating device and heat-exchange method.
Background technology
In recent years; the fossil energy worsening shortages such as coal, oil, natural gas, the problems such as energy crisis and environmental pollution day by day highlight, and have become the cardinal task that threatens human survival; the exploitation of new forms of energy are seemed to particularly important, particularly the exploitation to solar energy.Solar energy has the unrivaled advantage of other energy as a kind of reproducible clean energy resource.China's solar energy resources is very abundant, and an overwhelming majority area year irradiation is greater than 5 * 10 6kJ/m 2, year sunshine time is more than 2000h.Solar energy is inexhaustible, all can develop everywhere, without exploitation and transportation, does not pollute the environment and destroys the ecological balance, meets the requirement of " building a resource-conserving and environment-friendly society " that country advocates, has good effects of energy saving and emission reduction.Therefore to the exploitation of solar energy, will create good social benefit, environmental benefit and economic benefit.
The aircondition refrigeration modes of existing solar energy mainly contains photoelectricity refrigeration and with two kinds of the absorption refrigerations of auxiliary fuel.Wherein, the solar airconditioning of absorption refrigeration is comprised of vacuum tube collector, lithium-bromide absorption-type refrigerating machine, circulating pump, cooling tower, air-cooled coil pipe, auxiliary fuel or gas fired-boiler and automatic control system.Lithium-bromide absorption-type refrigerating machine is as standard device, and it is mainly comprised of high pressure generator, low pressure generator, evaporimeter, absorber, cooling tower, cool-heat-exchanger, concentrator, generator pump.The cold-producing medium of lithium-bromide absorption-type refrigerating machine group is nontoxic, and atmosphere is not had to destruction, and effects of energy conservation and environmental protection is remarkable.But, because vacuum tube solar heating element heat production coolant-temperature gage does not reach the temperature requirement that refrigeration machine drives, refrigeration machine can not normally be moved continuously, cause the problem of whole system coefficient of performance step-down not to be well solved.
Given this, by the solar water stove focusing at solar energy central air-conditioning system integration of compact concavees lens, the hot water that solar energy vacuum tube heat collector is produced heats again, the hot water operating temperature that reaches energy high efficiency drive lithium-bromide absorption-type refrigerating machine unit, is improved whole solar energy central Performance for Air Conditioning Systems coefficient.Meanwhile, by large-scale tank, store the chilled water produced daytime for evening, this water cold-storage method can meet the requirement that central air-conditioning moves continuously.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the problem that existing solar airconditioning is made a low multiple use, and proposes a kind of solar energy central air-conditioning system integrating device and heat-exchange method.
For solving the problems of the technologies described above, solution of the present invention is:
A kind of solar energy central air-conditioning system integrating device is provided, comprises the solar energy vacuum tube heat collector and the lithium-bromide absorption-type refrigerating machine group that by pipeline, form hot-water return; Fan coil forms chilled water circuit by pipeline and lithium-bromide absorption-type refrigerating machine group, and catch basin forms water cold-storage loop by pipeline and fan coil; It is characterized in that, this device also comprises solar water stove, and solar energy vacuum tube heat collector, solar water stove are connected by pipeline successively with lithium-bromide absorption-type refrigerating machine group.
In the present invention, this device also comprises two water demineralizers, is connected in described hot-water return and chilled water circuit respectively by pipeline.The interior recirculated water moving in device is all the soft water of processing through softening, soft water is less scaling when individual device interior circulates like this, can not reduce collecting efficiency, the operational efficiency of lithium-bromide absorption-type refrigerating machine group and the heat exchange efficiency of fan coil of solar energy vacuum tube heat collector and solar water stove.
In the present invention, described solar water stove is the solar energy equipment that concavees lens focus on.
The present invention also further provides the method for the solar energy central air-conditioning system integrated heat exchange based on aforementioned means, comprising:
(1) hot water flow process
Utilize the heating of solar energy vacuum tube heat collector one-level to produce low-temperature water heating, by warm water in the secondary heating generation of solar water stove, enter lithium-bromide absorption-type refrigerating machine group and drive refrigeration; Through lithium-bromide absorption-type refrigerating machine group, drive the normal-temperature water of cooling to reenter solar energy vacuum tube heat collector by water circulating pump, according to this circulation;
The temperature range of described low-temperature water heating is at 50-65 ℃; Described middle warm water's temperature range is at 65-90 ℃; The temperature range of described normal temperature hot water is at 30-40 ℃;
(2) chilled water flow process
Lithium-bromide absorption-type refrigerating machine group is produced chilled water, by chilled water pump transmission & distribution, enters fan coil, gives air cooling-down in the room that uses air-conditioning, according to this circulation by fan coil; The temperature range of chilled water is at 7-12 ℃;
Meanwhile, with catch basin, store the chilled water produced daytime for evening, by water cold-storage mode, meet the continuous requirement moving of central air-conditioning;
(3) moisturizing and demineralized water flow process
When the soft water of whole system circulation is not enough, former water softens by water demineralizer, then fills in hot-water return and chilled water circuit;
In said process, the Energy Efficiency Ratio (COP) of solar energy central air-conditioning system integrating device realizes by following formula:
COP = Q W 1 + W 2 + W 3 + W 4
In formula: COP-solar energy central air-conditioning system integrating device Energy Efficiency Ratio;
Q-solar energy central air-conditioning system integrating device refrigerating capacity, kW;
W 1-solar energy vacuum tube heat collector pump group power, kW;
W 2-solar water stove pump group power, kW;
W 3-lithium-bromide absorption-type refrigerating machine pump group power, kW;
W 4-fan coil power, kW.
In solar energy central air-conditioning system integrating device Energy Efficiency Ratio formula, refrigerating capacity Q realizes by following formula:
Q=CM(T o-T i
In formula: the specific heat at constant pressure of C-water, kJ/ (kg; ℃)
M-chilled-water flow, kg/s;
T o-chilled water outlet temperature, ℃;
T i-chilled water inlet temperature, ℃.
Pump group power W realizes by following formula:
W=ρgQH
In formula: W-pump group power, kW;
ρ-pump is carried the density of liquid, kg/m 3;
G-acceleration of gravity, m/s 2;
Q-pump is carried the flow of liquid, kg/s;
H-pump dehvery lift, m.
Compared with prior art, advantage of the present invention is:
By at solar energy central air-conditioning system integrated solar water heater, the hot water of solar energy vacuum tube heat collector product is heated again, meet the temperature of high efficiency drive lithium-bromide absorption-type refrigerating machine refrigeration, improve the utilization ratio of whole system solar energy.
Accompanying drawing explanation
Fig. 1 is solar air-conditioner system integrating device flow chart of the present invention;
Reference numeral in figure is: 1 solar energy vacuum tube heat collector; 2 solar water stoves; 3 lithium-bromide absorption-type refrigerating machine groups; 4 fan coils; 5 catch basins; 6 water demineralizers.
The specific embodiment
Solar energy central air-conditioning system integrating device in this embodiment, comprises the solar energy vacuum tube heat collector 1, the solar water stove 2 and lithium-bromide absorption-type refrigerating machine group 3 that by pipeline, are connected and formed with this hot-water return; Fan coil 4 forms chilled water circuit by pipeline and lithium-bromide absorption-type refrigerating machine group 3, and catch basin 5 forms water cold-storage loop by pipeline and fan coil 4.Two water demineralizers 6 are connected in hot-water return and chilled water circuit by pipeline respectively.Certainly, also can adopt a water demineralizer 6 to be connected to respectively in above-mentioned loop by pipeline.
Solar water stove 2 is the solar energy equipments that utilize concavees lens to focus on, and the low-temperature water heating that solar energy vacuum tube heat collector 1 can be produced is heated to the actuation temperature of lithium-bromide absorption-type refrigerating machine group.By at solar energy central air-conditioning system integrated solar water heater 2, the hot water of solar energy vacuum tube heat collector 1 product is heated again, meet the temperature of high efficiency drive lithium-bromide absorption-type refrigerating machine refrigeration 3, improve the utilization ratio of whole system solar energy.
Solar energy central air-conditioning system integrated heat exchange method in the present embodiment, comprises following flow process:
(1) hot water flow process
Utilize solar energy vacuum tube heat collector 1 one-level heating to produce low-temperature water heating, by warm water in the secondary heating generation of solar water stove 2, enter lithium-bromide absorption-type refrigerating machine group 3 and drive refrigeration; Through lithium-bromide absorption-type refrigerating machine group 3, drive the normal-temperature water of cooling to reenter solar energy vacuum tube heat collector 1 by water circulating pump, according to this circulation;
The temperature range of described low-temperature water heating is at 50-65 ℃; Described middle warm water's temperature range is at 65-90 ℃; The temperature range of described normal temperature hot water is at 30-40 ℃;
(2) chilled water flow process
Lithium-bromide absorption-type refrigerating machine group 3 is produced chilled water, by chilled water pump transmission & distribution, enters fan coil 4, gives air cooling-down in the room that uses air-conditioning, according to this circulation by fan coil 4; The temperature range of chilled water is at 7-12 ℃;
Meanwhile, with catch basin 5, store the chilled water produced daytime for evening, by water cold-storage mode, meet the continuous requirement moving of central air-conditioning;
(3) moisturizing and demineralized water flow process
When the soft water of whole system circulation is not enough, former water softens by water demineralizer 6, then fills in hot-water return and chilled water circuit;
In said process, the Energy Efficiency Ratio (COP) of solar energy central air-conditioning system integrating device realizes by following formula:
COP = Q W 1 + W 2 + W 3 + W 4
In formula: COP-solar energy central air-conditioning system integrating device Energy Efficiency Ratio;
Q-solar energy central air-conditioning system integrating device refrigerating capacity, kW;
W 1-solar energy vacuum tube heat collector pump group power, kW;
W 2-solar water stove pump group power, kW;
W 3-lithium-bromide absorption-type refrigerating machine pump group power, kW;
W 4-fan coil power, kW.
In solar energy central air-conditioning system integrating device Energy Efficiency Ratio formula, refrigerating capacity Q realizes by following formula:
Q=CM(T o-T i
In formula: the specific heat at constant pressure of C-water, kJ/ (kg; ℃)
M-chilled-water flow, kg/s;
T o-chilled water outlet temperature, ℃;
T i-chilled water inlet temperature, ℃.
Pump group power W realizes by following formula:
W=ρgQH
In formula: W-pump group power, kW;
ρ-pump is carried the density of liquid, kg/m 3;
G-acceleration of gravity, m/s 2;
Q-pump is carried the flow of liquid, kg/s;
H-pump dehvery lift, m.

Claims (4)

1. a solar energy central air-conditioning system integrating device, comprises the solar energy vacuum tube heat collector and the lithium-bromide absorption-type refrigerating machine group that pipeline, consist of hot-water return; Fan coil forms chilled water circuit by pipeline and lithium-bromide absorption-type refrigerating machine group, and catch basin forms water cold-storage loop by pipeline and fan coil; It is characterized in that, this device also comprises solar water stove, and solar energy vacuum tube heat collector, solar water stove are connected by pipeline successively with lithium-bromide absorption-type refrigerating machine group.
2. device according to claim 1, is characterized in that, this device also comprises two water demineralizers, is connected in described hot-water return and chilled water circuit respectively by pipeline.
3. device according to claim 1, is characterized in that, described solar water stove is the solar energy equipment that concavees lens focus on.
4. the solar energy central air-conditioning system integrated heat exchange method based on device described in claim 1, is characterized in that, comprising:
(1) hot water flow process
Utilize the heating of solar energy vacuum tube heat collector one-level to produce low-temperature water heating, by warm water in the secondary heating generation of solar water stove, enter lithium-bromide absorption-type refrigerating machine group and drive refrigeration; Through lithium-bromide absorption-type refrigerating machine group, drive the normal-temperature water of cooling to reenter solar energy vacuum tube heat collector by water circulating pump, according to this circulation;
The temperature range of described low-temperature water heating is at 50-65 ℃; Described middle warm water's temperature range is at 65-90 ℃; The temperature range of described normal temperature hot water is at 30-40 ℃;
(2) chilled water flow process
Lithium-bromide absorption-type refrigerating machine group is produced chilled water, by chilled water pump transmission & distribution, enters fan coil, gives air cooling-down in the room that uses air-conditioning, according to this circulation by fan coil; The temperature range of chilled water is at 7-12 ℃;
Meanwhile, with catch basin, store the chilled water produced daytime for evening, by water cold-storage mode, meet the continuous requirement moving of central air-conditioning;
(3) moisturizing and demineralized water flow process
When the soft water of whole system circulation is not enough, former water softens by water demineralizer, then fills in hot-water return and chilled water circuit;
In said process, the Energy Efficiency Ratio (COP) of solar energy central air-conditioning system integrating device realizes by following formula:
COP = Q W 1 + W 2 + W 3 + W 4
In formula: COP-solar energy central air-conditioning system integrating device Energy Efficiency Ratio;
Q-solar energy central air-conditioning system integrating device refrigerating capacity, kW;
W 1-solar energy vacuum tube heat collector pump group power, kW;
W 2-solar water stove pump group power, kW;
W 3-lithium-bromide absorption-type refrigerating machine pump group power, kW;
W 4-fan coil power, kW;
In solar energy central air-conditioning system integrating device Energy Efficiency Ratio formula, refrigerating capacity Q realizes by following formula:
Q=CM(T o-T i
In formula: the specific heat at constant pressure of C-water, kJ/ (kg; ℃)
M-chilled-water flow, kg/s;
T o-chilled water outlet temperature, ℃;
T i-chilled water inlet temperature, ℃;
Pump group power W realizes by following formula:
W=ρgQH
In formula: W-pump group power, kW;
ρ-pump is carried the density of liquid, kg/m 3;
G-acceleration of gravity, m/s 2;
Q-pump is carried the flow of liquid, kg/s;
H-pump dehvery lift, m.
CN201310659208.XA 2013-12-06 2013-12-06 Solar energy central air conditioning system integrating device and heat-exchange method Active CN103629769B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105423471A (en) * 2015-12-31 2016-03-23 河南省电力勘测设计院 Comprehensive utilization energy-saving system for natural resources of oil-fired thermal plant in tropical desert region
CN107642854A (en) * 2017-08-11 2018-01-30 广西超星太阳能科技有限公司 A kind of new type solar energy air-conditioning

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CN101324360A (en) * 2007-06-11 2008-12-17 卢剑超 Array type spherical surface focusing solar energy high temperature heat storage lithium bromide absorption type air conditioner
CN101813349A (en) * 2009-02-24 2010-08-25 胡野 Solar air conditioner
CN101988721A (en) * 2009-08-04 2011-03-23 泰安市鸿雁科贸有限公司 Novel two-stage absorption solar air conditioning system
JP2013002763A (en) * 2011-06-20 2013-01-07 Shin Nippon Air Technol Co Ltd Solar heat utilizing air conditioning system
CN102997492A (en) * 2012-12-03 2013-03-27 华中科技大学 Solar hot water and air conditioner integrated heat utilization system
CN103277856A (en) * 2013-05-28 2013-09-04 中国科学院广州能源研究所 Solar seasonal cold and hot combined air conditioning system
CN203258781U (en) * 2013-05-17 2013-10-30 中国航天建设集团有限公司 Solar air conditioning system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101324360A (en) * 2007-06-11 2008-12-17 卢剑超 Array type spherical surface focusing solar energy high temperature heat storage lithium bromide absorption type air conditioner
CN101813349A (en) * 2009-02-24 2010-08-25 胡野 Solar air conditioner
CN101988721A (en) * 2009-08-04 2011-03-23 泰安市鸿雁科贸有限公司 Novel two-stage absorption solar air conditioning system
JP2013002763A (en) * 2011-06-20 2013-01-07 Shin Nippon Air Technol Co Ltd Solar heat utilizing air conditioning system
CN102997492A (en) * 2012-12-03 2013-03-27 华中科技大学 Solar hot water and air conditioner integrated heat utilization system
CN203258781U (en) * 2013-05-17 2013-10-30 中国航天建设集团有限公司 Solar air conditioning system
CN103277856A (en) * 2013-05-28 2013-09-04 中国科学院广州能源研究所 Solar seasonal cold and hot combined air conditioning system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105423471A (en) * 2015-12-31 2016-03-23 河南省电力勘测设计院 Comprehensive utilization energy-saving system for natural resources of oil-fired thermal plant in tropical desert region
CN107642854A (en) * 2017-08-11 2018-01-30 广西超星太阳能科技有限公司 A kind of new type solar energy air-conditioning

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