CN202928135U - Wall-mounted flat-plate solar water heater with separated heat pipes - Google Patents

Wall-mounted flat-plate solar water heater with separated heat pipes Download PDF

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Publication number
CN202928135U
CN202928135U CN2012205298189U CN201220529818U CN202928135U CN 202928135 U CN202928135 U CN 202928135U CN 2012205298189 U CN2012205298189 U CN 2012205298189U CN 201220529818 U CN201220529818 U CN 201220529818U CN 202928135 U CN202928135 U CN 202928135U
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CN
China
Prior art keywords
heat
described
evaporimeter
condenser
water heater
Prior art date
Application number
CN2012205298189U
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Chinese (zh)
Inventor
蒋绿林
陈俊华
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常州市康舒环境科技有限公司
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Priority to CN2012205298189U priority Critical patent/CN202928135U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy
    • Y02E10/44Heat exchange systems

Abstract

The utility model discloses a wall-mounted flat-plate solar water heater with separated heat pipes. The wall-mounted flat-plate solar water heater comprises a heat accumulation water tank, a condenser and an evaporator, the evaporator comprises a heat absorbing plate core and the evaporation ends of the separated heat pipes which are integrally molded with the heat absorbing plate core, the condenser comprises condensation sections of the separated heat pipes, the condenser is arranged inside the heat accumulation water tank, the gaseous phase portion of the evaporator is connected with the gaseous phase portion of the condenser through a steam ascending pipe, and the liquid phase portion of the evaporator is connected with the liquid phase portion of the condenser through a condensate descending pipe. By means of the mode, the wall-mounted flat-plate solar water heater with separated heat pipes adopts the technology of the separated heat pipes, guarantees high system thermal efficiency, avoids heat loss when the separated heat pipes do not work, and solves the anti-freezing problem of a flat-plate solar collector and a system pipe.

Description

Separating heat tube wall hanging type flat plate solar water heater

Technical field

The utility model relates to solar energy heat utilization field, particularly relates to a kind of separating heat tube wall hanging type flat plate solar water heater.

Background technology

The unique channel that solar water heater is come into the city is as split-type air conditioner is installed, the Split wall-mounted solar water heater to be installed.Its concrete technology path of implementing is that solar heat-collection plate is arranged on the outer facade (as balcony, metope etc.) of building south orientation, heat storage water tank is arranged on indoor, arranges the thermal-arrest circulation line between collecting plate and heat storage water tank.

Solar heat-collection plate is arranged on facade and must and builds perfect adaptation, namely satisfy the requirement of architecture-integral,, bulk strength large with its distinctive advantage-daylighting area at numerous collecting plate middle plateform formula solar heat-collection plates, bearing operation, anticorrosive, appearance looks elegant and show one's talent.But also because of the popularization of its intrinsic defective effect city Solar Heater Market, these defectives comprise existing flat panel solar heat collecting plate: under low temperature environment, efficient low, antifreeze problem environment temperature collecting plate below 0 ℃ in efficient low and high temperature workspace is difficult to solve.

Antifreeze is the problem that the plate solar collecting plate needs most solution.Solving antifreeze problem the best way in prior art is to adopt anti-icing fluid as heating carrier, but anti-icing fluid can produce the cracking inefficacy through being exposed to the sun of summer high-temperature, once could fully guarantee the normal operation of system so anti-icing fluid must be changed every year (2-3 years at the most).

The utility model content

The technical problem that the utility model mainly solves is to provide a kind of separating heat tube wall hanging type flat plate solar water heater, adopt the separating heat tube technology, can guarantee that system thermal efficiency is high, prevent scattering and disappearing of when separating heat tube is not worked heat energy, solved the antifreeze problem of flat-plate solar collector and system pipeline.

for solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of separating heat tube wall hanging type flat plate solar water heater is provided, comprise: heat storage water tank, condenser and evaporimeter, described evaporimeter comprise heat-absorbing plate core and with the evaporation ends of the integrated separating heat tube of described heat-absorbing plate core, condenser comprises the condensation segment of separating heat tube, described condenser is arranged at heat storage water tank inside, the gas phase part of described evaporimeter connects the gas phase part of condenser by vapor uptake, the liquid phase part of described evaporimeter connects the liquid phase part of condenser by condensate descending.

In preferred embodiment of the utility model, the installation site of described condenser is higher than the installation site of evaporimeter.

In preferred embodiment of the utility model, on described vapor uptake, the steam (vapor) outlet end of evaporimeter is provided with gas-liquid separator.

In preferred embodiment of the utility model, be provided with reservoir on described condensate descending, the bottom position of described reservoir is higher than the apical position of evaporimeter.

In preferred embodiment of the utility model, be provided with temperature-sensing valve on described condensate descending, described temperature-sensing valve is arranged between fluid reservoir and evaporimeter.

In preferred embodiment of the utility model, described evaporimeter also comprises frame, backboard and transparent cover plate, and described frame is arranged on the surrounding of evaporimeter, and described backboard is arranged on the back of heat-absorbing plate core, and described transparent cover plate is arranged on the surface of heat-absorbing plate core.

In preferred embodiment of the utility model, be provided with heat exchanger tube and heat absorbing fins on described heat-absorbing plate core or in heat-absorbing plate core, described heat exchanger tube and heat absorbing fins link into an integrated entity, and evaporation ends and the heat-absorbing plate core of described heat pipe are one-body molded.

The beneficial effects of the utility model are: the utility model separating heat tube wall hanging type flat plate solar water heater adopts the separating heat tube technology, its heat transfer power is the twice of general heat pipe through-put power, 20 times of heat convection, guaranteed that system thermal efficiency is high, prevent scattering and disappearing of when separating heat tube is not worked heat energy, solved the antifreeze problem of flat-plate solar collector and system pipeline.

Description of drawings

Fig. 1 is the structural representation of the utility model separating heat tube wall hanging type flat plate solar water heater one preferred embodiment;

Fig. 2 is the structural representation of the utility model separating heat tube wall hanging type flat plate solar water heater evaporimeter;

In accompanying drawing, the mark of each parts is as follows: 1, heat storage water tank, 2, condenser, 3, gas-liquid separator, 4, vapor uptake, 5, evaporimeter, 6, heat exchanger tube, 7, heat-absorbing plate core, 8, frame, 9, the fluid-tight structure, 10, temperature-sensing valve, 11, condensate descending, 12, reservoir, 21, backboard, 22, transparent cover plate, 23, heat absorbing fins.

The specific embodiment

Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that, protection domain of the present utility model is made more explicit defining.

See also Fig. 1 to Fig. 2, the utility model embodiment comprises:

A kind of separating heat tube wall hanging type flat plate solar water heater has adopted the separating heat tube technology, with evaporation ends one-body molded the made tube wing type evaporimeter of the heat-absorbing plate core 7 in the flat panel solar heat collecting plate with separating heat tube, is arranged on outdoor exterior wall; The form that the condensation segment of separating heat tube has been made condenser 2 is positioned over the inside of heat storage water tank 1, is arranged on balcony or indoor.Wherein the installation site of condenser 2 is higher than the installation site of evaporimeter 5.

The gas phase of evaporimeter 5 partly connects the gas phase part of condenser 2 by vapor uptake 4, the liquid phase part of evaporimeter 5 connects the liquid phase part of condenser 2 by condensate descending 11.

On condensate liquid descends 11 pipes, a fluid reservoir 12, temperature-sensing valve 10 and fluid-tight structure 9 are set.

The bottom position of fluid reservoir 12 is higher than the apical position of evaporimeter 5, the advantage of fluid reservoir 12 is: because filling amount in separating heat tube is more, arranging of fluid reservoir 12 guaranteed along with the space increase of temperature rising expansion of liquids, cut off temperature-sensing valve 10 after heat storage water tank 1 temperature reaches setting value, guarantee the storage of working solution.

Adopted the working forms of full liquid due to evaporimeter 5, when operating temperature raise, the increase of working media specific volume can cause reducing of condenser 2 effective condensation areas, thereby worsens whole condensation process, and the operating efficiency of system is reduced greatly.The impact of adopting fluid reservoir 12 can avoid the working media specific volume to change, thus the assurance system is in efficient running status all the time.

Temperature-sensing valve 10 is arranged between fluid reservoir 12 and evaporimeter 5, and it can guarantee that heat storage water tank 1 water temperature is not too high, prevents from scalding, and can protect the panel solar evaporimeter not move under super-pressure.After the interior hot water temperature of heat storage water tank 1 reaches target temperature, cut off the transmission of heat by closing temperature-sensing valve 10.Closing of temperature-sensing valve 10 can effectively avoid system excess pressure to occur, if do not stop the feed flow to evaporimeter 5, in sun-drenched situation, can make the whole system hypertonia.

Arranging of fluid-tight structure 9 ensured that working media flows according to set direction all the time.

Steam outlet at evaporimeter 5 is installed a gas-liquid separator 3, has avoided gas-liquid delivery in vapor uptake 4, has improved heat exchange efficiency.

Described evaporimeter 5 comprises heat exchanger tube 6, heat-absorbing plate core 7, frame 8, backboard 21 and transparent cover plate 22.As shown in Figure 2, the top of heat-absorbing plate core 7 is equipped with transparent cover plate 22, and the back of heat-absorbing plate core 7 is equipped with backboard 21, is provided with frame 8 in the surrounding of evaporimeter 5.

Be provided with heat exchanger tube 6 and heat absorbing fins 23 on heat-absorbing plate core 7, heat exchanger tube 6 links into an integrated entity with heat absorbing fins 23, and a plurality of heat absorbing fins 23 connect into a whole plate each other.

The frame 8 of 7 of the backboard 21 of described solar energy tube wing type evaporimeter and heat-absorbing plate cores and surrounding is provided with the thermal insulation separation thermosphere, and they adopt the polyurethane integral foaming, have stopped heat bridge, reduce heat waste, have greatly improved the heat collector collecting efficiency.

Magnetron sputtering titanium oxynitrides or electroplating black chromium solar coating for selective absorption are adopted in the surface of described heat absorbing fins 23, and heat absorption rate reaches 95% ± 2%, and emissivity is lower than 8%, stable performance; Described transparent cover plate 22 adopts low iron, woven design, safety glass, and high transmission rate and woven design diffuse reflection make between heat-absorbing plate core and glass inner chamber and form greenhouse effects, and tempering makes intensity higher, not easy damaged.

Described heat exchanger tube 6 is connected in aggregates with heat absorbing fins 23, the mode by welding or expanded joint between them connects, and this heat exchanger tube 6 adopts the metals such as copper, alloy aluminum to make.Composed in parallel the heat-absorbing plate core 7 of evaporimeter 5 by many evaporating heat-exchanging pipes 6, connection is connected respectively at two of the heat exchanger tube 6 of evaporimeter 5 with condensate descending by vapor uptake 4.

In the utility model, the working medium in separating heat tube adopts cold-producing medium (R134a or R22), vacuumizes injection.Be full of cold-producing medium (R134a, R22) in heat exchanger tube, form the evaporimeter 5 of full-liquid type.Have the following advantages:

A, original convective heat transfer liquid mode is changed into heat pipe phase-change heat-exchange mode, greatly reduce heat waste, improved heat transference efficiency, make plate solar collector just can keep high collecting efficiency at low-temperature space;

B, working media are the full-liquid type evaporation at the evaporated form of heat exchanger tube 6: on the one hand, the full-liquid type evaporation has effectively promoted the heat exchange efficiency of separating heat tube evaporation ends, makes the hot efficiency of thermal transfer of separating heat tube obtain great lifting; On the other hand, evaporation evenly fully, has guaranteed that whole heat-absorbing plate core 7 surface temperatures are even, greatly reduces the surface heat migration loss;

C, employing cold-producing medium (R134a, R22) are as work medium for heat pipe, and in the normal working temperature scope, system is in operation under positive pressure all the time, many adverse effects of avoiding conventional heat-tube vacuum operation to bring;

D, in the normal working temperature scope, working media thoroughly solves antifreeze problem without freezing point;

E, due to " thermal diode " effect of Gravity Separation heat pipe, prevented the defeated of heat energy, effectively prevented scattering and disappearing of when separating heat tube is not worked heat energy, realized that separate heat pipe is applied to the efficient and stable operation of solar heating.

Separating heat tube is filled with cold-producing medium at evaporimeter 5 inner flow passages before starting, and at this moment the pressure and temperature of evaporimeter 5 inner refrigerants is saturation pressure and the saturation temperature of cold-producing medium under environment temperature.Along with heat-absorbing plate core 7 absorbs solar radiation energy, heat-absorbing plate core 7 temperature rise, and inner flow passage inner refrigerant start vaporizer, pressure and temperature begin to rise.This moment is due to the effect of fluid-tight structure 9 on condensate descending 11, can only move along the direction towards vapor uptake by thermogenetic refrigerant vapour, form the gas-liquid two-phase motion in evaporimeter 5 inner flow passages, wherein liquid phase constantly is evaporated, and gas phase shared collection area in runner is increasing.

The cold-producing medium of evaporation collects in vapor uptake and then enters gas-liquid separator 3, the liquid of carrying secretly in rising steam accumulates in gas-liquid separator 3 bottoms under Action of Gravity Field, return to condensate descending 11 by the tube connector with condensate descending 11, steam enters the condenser 2 that is arranged in heat storage water tank 1 and heats cold water in heat storage water tank 1 by the condensation heat release by vapor uptake 4, condensate liquid enters condensate descending 11 and replenishes the liquid that is evaporated in evaporimeter 5 under Action of Gravity Field, thereby has formed a heat-pipe working medium circulation.

Along with heat storage water tank 1 inner cold water temperature constantly raises, in system, operating pressure and operating temperature also constantly raise to adapt to dynamics and thermodynamical equilibrium under new operating mode, this is, operating pressure and operating temperature in evaporimeter 5 constantly raise, reach design temperature until be heated cold water temperature in heat storage water tank 1, cut off condensate descending 11 by controlling temperature-sensing valve 10, stop feed flow.In evaporimeter 5, residual working medium can continue evaporation, rises to condenser 2 condensations, forms superheated steam until all dry up.

In evaporimeter 5 inner flow passages, gas-liquid two-phase motion flow pattern depends on affected by hot loading (being the evaporation capacity of cold-producing medium) and runner size and arrangement form, and desirable working condition is just to be evaporated at evaporimeter 5 inner flow passages and vapor uptake 4 interface liquid.Under normal circumstances, the cold-producing medium of evaporimeter 5 inner flow passages has two kinds of working conditions: one, when low heat loads, evaporation capacity is less, also is not evaporated at evaporimeter 5 inner flow passages and vapor uptake 4 channel interface place liquid; Two, when high heat load, evaporation capacity is larger, just is evaporated at evaporimeter 5 inner flow passages and vapor uptake 4 channel interface place liquid, and at this moment the steam in vapor uptake 4 has certain degree of superheat.

The operation principle of the utility model separating heat tube wall hanging type flat plate solar water heater is:

Sunlight shines on heat-absorbing plate core 7 by transparent cover plate 22, on heat absorbing fins 23, solar selectively absorbing coating absorbs solar radiation and is converted into heat energy at this moment, transfer heat to simultaneously the working media of heat exchanger tube 6 inside, make it to become gaseous state by the liquid state heat absorption; Gaseous working medium enters condenser 3 through vapor uptake 4 and gas-liquid separator 3, and the gaseous state heat release is condensed into liquid state, the cold water in working media condensation liberated heat heating heat storage water tank 1; Liquid working media enters evaporimeter 5 through condensate descending 11, fluid reservoir 12, temperature-sensing valve 10 and fluid-tight structure 9 under Action of Gravity Field, thereby the solar energy that again absorbs 7 conversions of self-priming hot plate core enters next heat transmission circulation.

The beneficial effect of the utility model separating heat tube wall hanging type flat plate solar water heater is:

One, the heat-absorbing plate core 7 in the flat panel solar heat collecting plate and the evaporation ends of separating heat tube are made the full liquid evaporimeter of integrally formed tube wing type, the interior working medium of heat exchanger tube 6 is full of evaporimeter 5 inner flow passages in original state, its advantage is that evaporation is evenly abundant, whole heat-absorbing plate core 7 surface temperatures are even, greatly reduce surface heat and migrate loss, the separating heat tube heat transfer power is the twice of general heat pipe through-put power simultaneously, is 20 times of heat convection, and system effectiveness is high;

Two, adopt cold-producing medium (R134a, R22) as the separating heat tube working solution, the freezing point temperature of R134a and R22 is respectively-40 ℃ and-50 ℃, has thoroughly solved the antifreeze problem of flat-plate solar collector and system pipeline;

Three, owing to adopting cold-producing medium (R134a, R22) as the separating heat tube working solution, so in separating heat tube normal working temperature scope, operating pressure always keeps malleation, avoid incoagulable gas (as air) to enter heat pipe, overcome conventional heat pipe and worked under the certain vacuum degree and be difficult for to guarantee the shortcoming of vacuum;

Four, due to " thermal diode " effect of Gravity Separation heat pipe, prevent the defeated of heat energy, effectively prevented scattering and disappearing of when separating heat tube is not worked heat energy.

The above is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.

Claims (7)

1. separating heat tube wall hanging type flat plate solar water heater, it is characterized in that, comprise: heat storage water tank, condenser and evaporimeter, described evaporimeter comprise heat-absorbing plate core and with the evaporation ends of the integrated separating heat tube of described heat-absorbing plate core, condenser comprises the condensation segment of separating heat tube, described condenser is arranged at heat storage water tank inside, the gas phase part of described evaporimeter connects the gas phase part of condenser by vapor uptake, the liquid phase part of described evaporimeter connects the liquid phase part of condenser by condensate descending.
2. separating heat tube wall hanging type flat plate solar water heater according to claim 1, is characterized in that, the installation site of described condenser is higher than the installation site of evaporimeter.
3. separating heat tube wall hanging type flat plate solar water heater according to claim 1, is characterized in that, on described vapor uptake, the steam (vapor) outlet end of evaporimeter is provided with gas-liquid separator.
4. separating heat tube wall hanging type flat plate solar water heater according to claim 1, is characterized in that, be provided with reservoir on described condensate descending, the bottom position of described reservoir is higher than the apical position of evaporimeter.
5. separating heat tube wall hanging type flat plate solar water heater according to claim 1, is characterized in that, be provided with temperature-sensing valve on described condensate descending, described temperature-sensing valve is arranged between fluid reservoir and evaporimeter.
6. separating heat tube wall hanging type flat plate solar water heater according to claim 1, it is characterized in that, described evaporimeter also comprises frame, backboard and transparent cover plate, described frame is arranged on the surrounding of evaporimeter, described backboard is arranged on the back of heat-absorbing plate core, and described transparent cover plate is arranged on the top of heat-absorbing plate core.
7. separating heat tube wall hanging type flat plate solar water heater according to claim 6, it is characterized in that, be provided with heat exchanger tube and heat absorbing fins on described heat-absorbing plate core or in heat-absorbing plate core, described heat exchanger tube and heat absorbing fins link into an integrated entity, evaporation ends and the heat-absorbing plate core of described heat pipe are one-body molded, form the tube wing type evaporimeter.
CN2012205298189U 2012-10-17 2012-10-17 Wall-mounted flat-plate solar water heater with separated heat pipes CN202928135U (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103453577A (en) * 2013-08-15 2013-12-18 常州市康舒环境科技有限公司 Split type flat-plate solar heat pump heating device and control method thereof
CN103486739A (en) * 2013-09-03 2014-01-01 深圳市桑霞太阳能有限公司 Solar heat pump water heater
CN103486760A (en) * 2013-10-21 2014-01-01 中国科学技术大学 Solar heat collection-radiation refrigeration integration device
CN103528204A (en) * 2013-10-24 2014-01-22 镇江新梦溪能源科技有限公司 Vacuum-tube solar thermal collector
CN103528215A (en) * 2013-10-24 2014-01-22 镇江新梦溪能源科技有限公司 Flat-panel solar heat collector
CN103542750A (en) * 2013-10-24 2014-01-29 镇江新梦溪能源科技有限公司 Coiler-type separating-heat-pipe heat exchange system
CN103672834A (en) * 2013-11-12 2014-03-26 焦作力合机械制造有限公司 Flue waste heat recovery device
CN104566616A (en) * 2015-02-04 2015-04-29 东南大学 Indoor heating system based on coupling of separated heat pipe and flat-plate solar heat collector
CN104595967A (en) * 2015-02-13 2015-05-06 东南大学 Heating device of solar water heater with discrete-type heat pipes
CN104776611A (en) * 2015-04-11 2015-07-15 郑州大学 Heat collection evaporator with built-in passage and solar water heater with same
CN104776622A (en) * 2015-04-11 2015-07-15 郑州大学 Heat collection evaporator with external channel and solar water heater provided with heat collection evaporator
CN104792040A (en) * 2015-04-11 2015-07-22 郑州大学 Tubular heat-collection evaporator and solar water heater with same
CN104879933A (en) * 2015-04-11 2015-09-02 郑州大学 Steam box heat-collecting evaporator and solar water heater with heat-collecting evaporator
CN105202781A (en) * 2015-10-15 2015-12-30 南京苏佰能能源科技有限公司 Active heat pipe flat solar water heater
CN105783086A (en) * 2016-04-29 2016-07-20 广东工业大学 Solar heat pump system with micro-channel flat plate loop heat pipe

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103453577A (en) * 2013-08-15 2013-12-18 常州市康舒环境科技有限公司 Split type flat-plate solar heat pump heating device and control method thereof
CN103453577B (en) * 2013-08-15 2019-01-18 常州海卡太阳能热泵有限公司 Split type plate type solar heat pump heat collector and its control method
CN103486739A (en) * 2013-09-03 2014-01-01 深圳市桑霞太阳能有限公司 Solar heat pump water heater
CN103486760A (en) * 2013-10-21 2014-01-01 中国科学技术大学 Solar heat collection-radiation refrigeration integration device
CN103528215A (en) * 2013-10-24 2014-01-22 镇江新梦溪能源科技有限公司 Flat-panel solar heat collector
CN103542750A (en) * 2013-10-24 2014-01-29 镇江新梦溪能源科技有限公司 Coiler-type separating-heat-pipe heat exchange system
CN103528204A (en) * 2013-10-24 2014-01-22 镇江新梦溪能源科技有限公司 Vacuum-tube solar thermal collector
CN103672834A (en) * 2013-11-12 2014-03-26 焦作力合机械制造有限公司 Flue waste heat recovery device
CN103672834B (en) * 2013-11-12 2016-08-17 焦作力合机械制造有限公司 Device for recovering residual heat of flue
CN104566616A (en) * 2015-02-04 2015-04-29 东南大学 Indoor heating system based on coupling of separated heat pipe and flat-plate solar heat collector
CN104595967A (en) * 2015-02-13 2015-05-06 东南大学 Heating device of solar water heater with discrete-type heat pipes
CN104792040A (en) * 2015-04-11 2015-07-22 郑州大学 Tubular heat-collection evaporator and solar water heater with same
CN104879933A (en) * 2015-04-11 2015-09-02 郑州大学 Steam box heat-collecting evaporator and solar water heater with heat-collecting evaporator
CN104776622A (en) * 2015-04-11 2015-07-15 郑州大学 Heat collection evaporator with external channel and solar water heater provided with heat collection evaporator
CN104776611A (en) * 2015-04-11 2015-07-15 郑州大学 Heat collection evaporator with built-in passage and solar water heater with same
CN105202781A (en) * 2015-10-15 2015-12-30 南京苏佰能能源科技有限公司 Active heat pipe flat solar water heater
CN105783086A (en) * 2016-04-29 2016-07-20 广东工业大学 Solar heat pump system with micro-channel flat plate loop heat pipe

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