CN103629769B - Solar energy central air conditioning system integrating device and heat-exchange method - Google Patents

Solar energy central air conditioning system integrating device and heat-exchange method Download PDF

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

The present invention relates to solar utilization technique, it is desirable to provide utilize solar energy central air conditioning system integrating device and heat-exchange method;This invention includes solar energy vacuum tube heat collector and the lithium bromide absorption refrigerating set consisting of hot-water return pipeline;Fan coil constitutes chilled water circuit by pipeline with lithium bromide absorption refrigerating set, and catch basin constitutes water cold storage loop by pipeline with fan coil;It is characterized in that, this device also includes that solar water stove, solar energy vacuum tube heat collector, solar water stove are sequentially connected with by pipeline with lithium bromide absorption refrigerating set;The advantage of this invention is, by at solar energy central air conditioning system integrated solar water heater, the hot water that solar energy vacuum tube heat collector is produced reheats, and meets the temperature of high efficiency drive lithium-bromide absorption-type refrigerating machine refrigeration, improves the utilization ratio of whole system solar energy.

Description

Solar energy central air conditioning system integrating device and heat-exchange method
Technical field
The present invention relates to solar utilization technique, particularly to utilizing solar energy central air conditioning system integrating device and heat exchange side Method.
Background technology
In recent years, the fossil energy worsening shortages such as coal, oil, natural gas, the problem such as energy crisis and environmental pollution is day by day Highlight, it has also become threatening the cardinal task of human survival, the exploitation to new forms of energy are particularly important, the most right The exploitation of 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 the abundantest, and overwhelming majority area year irradiation is more than 5 × 106kJ/m2, year sunshine time exist More than 2000h.Solar energy is inexhaustible, the most all can develop, it is not necessary to exploits and transports, and will not pollute ring Border and destruction ecological balance, meet the requirement of " building a resource-conserving and environment-friendly society " that country advocates, tool There is good effects of energy saving and emission reduction.Therefore the exploitation to solar energy will create good social benefit, Environmental Effect Benefit and economic benefit.
The air-conditioning device refrigeration modes of existing solar energy mainly has photoelectricity refrigeration and the absorption refrigeration two kinds of band auxiliary fuel. Wherein, the solar airconditioning of absorption refrigeration is by 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 composition.Lithium-bromide absorption-type refrigerating machine is as mark Quasi-equipment, it mainly by high tension generator, low pressure generator, vaporizer, absorber, cooling tower, cool-heat-exchanger, Concentrator, generator pump form.The cold-producing medium of lithium bromide absorption refrigerating set is nontoxic, not destroys atmosphere Effect, effects of energy conservation and environmental protection is notable.But, drive owing to vacuum tube solar heating element heat production coolant-temperature gage does not reaches refrigeration machine Dynamic temperature requirement, makes the refrigeration machine can not be the most properly functioning, cause the problem of whole system coefficient of performance step-down To well solving.
In consideration of it, by the solar water stove focused at solar energy central air conditioning system integration of compact concavees lens, the sun The hot water that energy vacuum tube collector produces reheats, and reaches the hot water of energy high efficiency drive lithium-bromide absorption-type refrigerating machine unit Operating temperature, makes whole solar energy central Performance for Air Conditioning Systems coefficient be improved.Meanwhile, stored in vain by large-scale tank It chilled water produced can meet, for evening, this water cold storage method, the requirement that central air-conditioning runs 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 one Solar energy central air conditioning system integrating device and heat-exchange method.
For solving above-mentioned technical problem, the solution of the present invention is:
A kind of solar energy central air conditioning system integrating device is provided, constitutes the solar energy evacuated of hot-water return including by pipeline Pipe heat collector and lithium bromide absorption refrigerating set;Fan coil constitutes cold by pipeline with lithium bromide absorption refrigerating set Freezing water loop, catch basin constitutes water cold storage loop by pipeline with fan coil;It is characterized in that, this device also includes too Sun energy water heater, solar energy vacuum tube heat collector, solar water stove are depended on by pipeline with lithium bromide absorption refrigerating set Secondary connection.
In the present invention, this device also includes two water demineralizers, is connected to described hot-water return and freezing by pipeline respectively In water loop.The interior recirculated water run in a device is all the soft water through sofening treatment, and such soft water is at individual device interior When circulating less scaling, solar energy vacuum tube heat collector and the collecting efficiency of solar water stove, bromination will not be reduced The operational efficiency of lithium-absorbing formula refrigeration unit and the heat exchange efficiency of fan coil.
In the present invention, described solar water stove is the solar energy equipment that concavees lens focus on.
The present invention still further provides solar energy central air conditioning system integrated heat exchange method based on aforementioned means, including:
(1) hot water flow process
Utilize the heating of solar energy vacuum tube heat collector one-level to produce low-temperature water heating, add delivery in hot weather by two grades of solar water stove Warm water in life, enters lithium bromide absorption refrigerating set and drives refrigeration;Cooling is driven through lithium bromide absorption refrigerating set Normal-temperature water reenter solar energy vacuum tube heat collector by water circulating pump, circulate according to this;
The temperature range of described low-temperature water heating is at 50-65 DEG C;The temperature range of described middle warm water is at 65-90 DEG C;Described The temperature range of room temperature hot water is at 30-40 DEG C;
(2) chilled water flow process
Lithium bromide absorption refrigerating set produces chilled water, enters fan coil by chilled water pump transmission & distribution, passes through fan unit The room air cooling using air-conditioning given by pipe, circulates according to this;The temperature range of chilled water is at 7-12 DEG C;
Meanwhile, store the chilled water produced on daytime for evening with catch basin, meet central air-conditioning by water cold storage mode The requirement run continuously;
(3) moisturizing and softening Water flow-path
When the soft water deficiency of whole system circulation, former water is softened by water demineralizer, then fills into hot-water return and cold Freeze in water loop;
In said process, the Energy Efficiency Ratio (COP) of solar energy central air conditioning system integrating device realizes as follows:
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;
W1Solar energy vacuum tube heat collector pump group power, kW;
W2Solar water stove pump group power, kW;
W3Lithium-bromide absorption-type refrigerating machine pump group power, kW;
W4Fan coil power, kW.
In solar energy central air conditioning system integrating device Energy Efficiency Ratio formula, refrigerating capacity Q realizes as follows:
Q=CM(To-Ti)
In formula: the specific heat at constant pressure of C water, kJ/ (kg;℃)
M chilled-water flow, kg/s;
ToChilled water outlet temperature, DEG C;
TiChilled water inlet temperature, DEG C.
Pump group power W realizes as follows:
W=ρgQH
In formula: W pump group power, kW;
The density of ρ transport pump liquid, kg/m3
G acceleration of gravity, m/s2
The flow of Q transport pump liquid, kg/s;
H transport pump lift, m.
Compared with prior art, the advantage of the present invention is:
By at solar energy central air conditioning system integrated solar water heater, the hot water that solar energy vacuum tube heat collector is produced is again Heating, meets the temperature of high efficiency drive lithium-bromide absorption-type refrigerating machine refrigeration, improves the utilization ratio of whole system solar energy.
Accompanying drawing explanation
Fig. 1 is the solar air-conditioner system integrating device flow chart of the present invention;
Reference in figure is: 1 solar energy vacuum tube heat collector;2 solar water stoves;3 lithium bromide absorbing type refrigerations Unit;4 fan coils;5 catch basins;6 water demineralizers.
Detailed description of the invention
Solar energy central air conditioning system integrating device in this embodiment, returns including being connected by pipeline with this and constituted hot water The solar energy vacuum tube heat collector 1 on road, solar water stove 2 and lithium bromide absorption refrigerating set 3;Fan coil 4 Constituting chilled water circuit by pipeline and lithium bromide absorption refrigerating set 3, catch basin 5 is by pipeline and fan coil 4 Constitute water cold storage loop.Two water demineralizers 6 are connected in hot-water return and chilled water circuit by pipeline respectively.Certainly, A water demineralizer 6 can also be used to be respectively connecting in above-mentioned loop by pipeline.
Solar water stove 2 is the solar energy equipment utilizing concavees lens to focus on, and can be produced by solar energy vacuum tube heat collector 1 Low-temperature water heating be heated to the actuation temperature of lithium bromide absorption refrigerating set.By integrated in solar energy central air conditioning system Solar water stove 2, the hot water that solar energy vacuum tube heat collector 1 is produced reheats, meets high efficiency drive lithium bromide absorption The temperature of formula refrigeration machine refrigeration 3, improves the utilization ratio of whole system solar energy.
Solar energy central air conditioning system integrated heat exchange method in the present embodiment, including below scheme:
(1) hot water flow process
Utilize the heating of solar energy vacuum tube heat collector 1 one-level to produce low-temperature water heating, added by two grades of solar water stove 2 Warm water during delivery in hot weather is raw, enters lithium bromide absorption refrigerating set 3 and drives refrigeration;Through lithium bromide absorption refrigerating set 3 The normal-temperature water driving cooling reenters solar energy vacuum tube heat collector 1 by water circulating pump, circulates according to this;
The temperature range of described low-temperature water heating is at 50-65 DEG C;The temperature range of described middle warm water is at 65-90 DEG C;Described The temperature range of room temperature hot water is at 30-40 DEG C;
(2) chilled water flow process
Lithium bromide absorption refrigerating set 3 produces chilled water, enters fan coil 4 by chilled water pump transmission & distribution, passes through wind The room air cooling using air-conditioning given by machine coil pipe 4, circulates according to this;The temperature range of chilled water is at 7-12 DEG C;
Meanwhile, store the chilled water produced daytime with catch basin 5 for evening, meet central hollow by water cold storage mode Adjust the requirement run continuously;
(3) moisturizing and softening Water flow-path
When the soft water deficiency of whole system circulation, former water is softened by water demineralizer 6, then fill into hot-water return and In chilled water circuit;
In said process, the Energy Efficiency Ratio (COP) of solar energy central air conditioning system integrating device realizes as follows:
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;
W1Solar energy vacuum tube heat collector pump group power, kW;
W2Solar water stove pump group power, kW;
W3Lithium-bromide absorption-type refrigerating machine pump group power, kW;
W4Fan coil power, kW.
In solar energy central air conditioning system integrating device Energy Efficiency Ratio formula, refrigerating capacity Q realizes as follows:
Q=CM(To-Ti)
In formula: the specific heat at constant pressure of C water, kJ/ (kg;℃)
M chilled-water flow, kg/s;
ToChilled water outlet temperature, DEG C;
TiChilled water inlet temperature, DEG C.
Pump group power W realizes as follows:
W=ρgQH
In formula: W pump group power, kW;
The density of ρ transport pump liquid, kg/m3
G acceleration of gravity, m/s2
The flow of Q transport pump liquid, kg/s;
H transport pump lift, m.

Claims (1)

1. a solar energy central air conditioning system integrated heat exchange method, it is characterised in that the method is based on solar energy central Air conditioning system integrating device realizes, and this device includes solar energy vacuum tube heat collector and the bromine consisting of hot-water return pipeline Change lithium-absorbing formula refrigeration unit;Fan coil constitutes chilled water circuit by pipeline with lithium bromide absorption refrigerating set, stores Tank constitutes water cold storage loop by pipeline with fan coil;It is characterized in that, this device also includes solar water stove, Solar energy vacuum tube heat collector, solar water stove are sequentially connected with by pipeline with lithium bromide absorption refrigerating set;This dress Put and also include two water demineralizers, be connected in described hot-water return and chilled water circuit by pipeline respectively;The described sun Can water heater be the solar energy equipment that concavees lens focus on;
Described method specifically includes:
(1) hot water flow process
Utilize the heating of solar energy vacuum tube heat collector one-level to produce low-temperature water heating, add delivery in hot weather by two grades of solar water stove Warm water in life, enters lithium bromide absorption refrigerating set and drives refrigeration;Cooling is driven through lithium bromide absorption refrigerating set Normal-temperature water reenter solar energy vacuum tube heat collector by water circulating pump, circulate according to this;
The temperature range of described low-temperature water heating is at 50-65 DEG C;The temperature range of described middle warm water is at 65-90 DEG C;Described The temperature range of room temperature hot water is at 30-40 DEG C;
(2) chilled water flow process
Lithium bromide absorption refrigerating set produces chilled water, enters fan coil by chilled water pump transmission & distribution, passes through fan unit The room air cooling using air-conditioning given by pipe, circulates according to this;The temperature range of chilled water is at 7-12 DEG C;
Meanwhile, store the chilled water produced on daytime for evening with catch basin, meet central air-conditioning by water cold storage mode The requirement run continuously;
(3) moisturizing and softening Water flow-path
When the soft water deficiency of whole system circulation, former water is softened by water demineralizer, then fills into hot-water return and cold Freeze in water loop;
In said process, the Energy Efficiency Ratio (COP) of solar energy central air conditioning system integrating device realizes as follows:
C O P = 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;
W1Solar energy vacuum tube heat collector pump group power, kW;
W2Solar water stove pump group power, kW;
W3Lithium-bromide absorption-type refrigerating machine pump group power, kW;
W4Fan coil power, kW;
In solar energy central air conditioning system integrating device Energy Efficiency Ratio formula, refrigerating capacity Q realizes as follows:
Q=CM (To-Ti)
In formula: the specific heat at constant pressure of C water, kJ/ (kg DEG C);
M chilled-water flow, kg/s;
ToChilled water outlet temperature, DEG C;
TiChilled water inlet temperature, DEG C;
Pump group power W realizes as follows:
W=ρ gQH
In formula: W pump group power, kW;
The density of ρ transport pump liquid, kg/m3
G acceleration of gravity, m/s2
The flow of Q transport pump liquid, kg/s;
H transport pump 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 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

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
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

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