CN108548350B - Solar refrigeration control system and control method thereof - Google Patents
Solar refrigeration control system and control method thereof Download PDFInfo
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- CN108548350B CN108548350B CN201810304331.2A CN201810304331A CN108548350B CN 108548350 B CN108548350 B CN 108548350B CN 201810304331 A CN201810304331 A CN 201810304331A CN 108548350 B CN108548350 B CN 108548350B
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- control system
- refrigeration
- heat preservation
- temperature sensor
- fan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
- F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
Abstract
The invention discloses a solar refrigeration control system and a control method thereof, and the solar refrigeration control system comprises a solar cell panel, a charge controller, a storage battery pack, an inverter, a control system and a refrigeration system, wherein the output end of the solar cell panel is connected with the input end of the charge controller, the output end of the charge controller is respectively connected with the storage battery pack and the input end of the inverter, the output end of the inverter is connected with the control system, the control system is also connected with the refrigeration system, and the refrigeration system comprises a semiconductor diode refrigeration sheet, mixed cooling solution, a radiating fin, a fan chamber and a heat preservation chamber. The invention adopts solar energy to provide power for the refrigeration system, saves energy, and simultaneously, the refrigeration system adopts the combination of the semiconductor refrigeration piece and the cooling solution, so that the heating part of the semiconductor refrigeration piece is kept at constant temperature, thereby greatly improving the refrigeration efficiency and reducing the utilization rate of energy.
Description
Technical Field
The invention belongs to the technical field of refrigeration, and particularly relates to a solar refrigeration control system and a control method thereof.
Background
The traditional refrigeration equipment adopts a power supply to drive a compressor to work for refrigeration, adopts secondary energy as power, cannot directly utilize solar energy, and adopts coal, oil or natural gas as electric power to be converted through power generation.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the defects in the prior art and provides a solar refrigeration control system and a solar refrigeration control method, wherein solar energy is used as a refrigeration system, and a semiconductor refrigeration sheet is combined with a refrigeration solution in the refrigeration system, so that the refrigeration efficiency is greatly improved.
The technical scheme is as follows: the invention relates to a solar refrigeration control system which comprises a solar cell panel, a charge controller, a storage battery pack, an inverter, a control system and a refrigeration system, wherein the output end of the solar cell panel is connected with the input end of the charge controller;
refrigerating system include semiconductor diode refrigeration piece, mixed cooling solution, radiating fin, fan room and heat preservation room, one side of mixed cooling solution is equipped with the semiconductor diode refrigeration piece, the opposite side of mixed cooling solution is equipped with radiating fin, radiating fin's the outside is equipped with fan room and heat preservation room, the fan is indoor to be equipped with the fan, and the heat preservation room is connected with the heat preservation valve, is equipped with temperature sensor Ti in the semiconductor diode refrigeration piece, and radiating fin department is equipped with temperature sensor Tw, and fan room air outlet department is equipped with temperature sensor TE.
Further, the mixed cooling solution adopts a mixed solution of sodium acetate trihydrate, ammonium acetate and a nucleating agent.
Further, the nucleating agent adopts borax.
Further, the heat preservation chamber is positioned at the upper part of the fan chamber.
The invention also discloses a control method of the solar refrigeration control system, which comprises the following steps:
(1) when the temperature sensor Ti is detected to be higher than 0 ℃, the semiconductor diode refrigerating sheet (1) works, and when the temperature sensor Ti is detected to be lower than-1 ℃, the semiconductor diode refrigerating sheet stops working;
(2) detecting whether the TE of the temperature sensor is less than 30 ℃, and entering the step (3) if not; if the temperature sensor Tw is further detected to be larger than 53 ℃, opening the fan and the heat preservation valve, and if not, entering the step (3);
(3) closing the fan and the heat preservation valve, and ending the process;
(4) the semiconductor diode refrigerating sheet works, whether the temperature sensor Tw is larger than 53 ℃ is detected, if yes, the step (5) is carried out, and if not, the step (6) is carried out;
(5) opening the fan and the heat preservation valve until the temperature sensor Tw is detected to be less than 53 ℃, and entering the step (6);
(6) and closing the heat preservation valve to enter the heat preservation operation.
Has the advantages that: the invention adopts solar energy to provide power for the refrigeration system, saves energy, and simultaneously, the refrigeration system adopts the combination of the semiconductor refrigeration piece and the cooling solution, so that the heating part of the semiconductor refrigeration piece is kept at constant temperature, thereby greatly improving the refrigeration efficiency and reducing the utilization rate of energy. Meanwhile, the mixed cooling concentrated solution is heated and crystallized by utilizing the lower ambient temperature at night, and the refrigerating system is heated at constant temperature by utilizing the hot end of the semiconductor when the temperature is high in the daytime, so that the efficiency of the refrigerating system is higher, and the power consumption is less.
Drawings
FIG. 1 is a schematic view of the overall structure of the solar refrigeration system of the present invention;
FIG. 2 is a schematic diagram of the refrigeration system of the present invention;
FIG. 3 is a graph of the mixed solution step-cooling curve;
FIG. 4 is a DSC thermal analysis chart of the mixed solution.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the following specific examples.
The solar refrigeration control system shown in fig. 1 comprises a solar cell panel, a charge controller, a storage battery pack, an inverter, a control system and a refrigeration system, wherein the output end of the solar cell panel is connected with the input end of the charge controller, the output end of the charge controller is respectively connected with the storage battery pack and the input end of the inverter, the output end of the inverter is connected with the control system, and the control system is further connected with the refrigeration system.
As shown in fig. 2, the refrigerating system includes a semiconductor diode refrigerating sheet 1, a mixed cooling solution 2, a heat dissipation fin 3, a fan chamber 4 and a heat preservation chamber 9, the semiconductor diode refrigerating sheet 1 is arranged on one side of the mixed cooling solution 2, the heat dissipation fin 3 is arranged on the other side of the mixed cooling solution 2, the fan chamber 4 and the heat preservation chamber 9 are arranged on the outer side of the heat dissipation fin 3, and the heat preservation chamber 9 is located on the upper portion of the fan chamber 4. A fan is arranged in the fan chamber 4, the heat preservation chamber 9 is connected with a heat preservation valve 5, a temperature sensor Ti 6 is arranged in the semiconductor diode refrigerating sheet 1, a temperature sensor Tw 7 is arranged at the position of the radiating fin 3, and a temperature sensor TE 8 is arranged at the position of an air outlet of the fan chamber 4.
Preferably, the mixed cooling solution 2 is a mixed solution of sodium acetate trihydrate, ammonium acetate and a nucleating agent, the nucleating agent is borax, and the mixed solution of the sodium acetate trihydrate, the ammonium acetate and the nucleating agent is used, and the specific analysis is as follows:
the phase transition temperature and enthalpy of phase transition of sodium acetate trihydrate and ammonium acetate binary system after the addition of nucleating agent (1.1% borax) were studied.
1. Determination of the step Cooling Curve
As shown in FIG. 3, recording a temperature value every 15s can obtain the phase transition temperature of the system at about 51.1-67 deg.C
2. Differential thermal testing, as shown in FIG. 4.
As can be seen from the above, the maximum working temperature of the semiconductor diode refrigerating plate is about 70 ℃, so the system completely accords with the working conditions of the semiconductor refrigerating plate.
The control method of the solar refrigeration control system comprises the following steps:
(1) when the temperature sensor Ti is detected to be higher than 0 ℃, the semiconductor diode refrigerating sheet (1) works, and when the temperature sensor Ti is detected to be lower than-1 ℃, the semiconductor diode refrigerating sheet stops working;
(2) detecting whether the TE of the temperature sensor is less than 30 ℃, and entering the step (3) if not; if the temperature sensor Tw is further detected to be larger than 53 ℃, opening the fan and the heat preservation valve, and if not, entering the step (3);
(3) closing the fan and the heat preservation valve, and ending the process;
(4) the semiconductor diode refrigerating sheet works, whether the temperature sensor Tw is larger than 53 ℃ is detected, if yes, the step (5) is carried out, and if not, the step (6) is carried out;
(5) opening the fan and the heat preservation valve until the temperature sensor Tw is detected to be less than 53 ℃, and entering the step (6);
(6) and closing the heat preservation valve to enter the heat preservation operation.
The invention adopts solar energy to provide power for the refrigeration system, saves energy, and simultaneously, the refrigeration system adopts the combination of the semiconductor refrigeration piece and the cooling solution, so that the heating part of the semiconductor refrigeration piece is kept at constant temperature, thereby greatly improving the refrigeration efficiency and reducing the utilization rate of energy. Meanwhile, the mixed cooling concentrated solution is heated and crystallized by utilizing the lower ambient temperature at night, and the refrigerating system is heated at constant temperature by utilizing the hot end of the semiconductor when the temperature is high in the daytime, so that the efficiency of the refrigerating system is higher, and the power consumption is less.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A control method of a solar refrigeration control system is characterized by comprising the following steps: the solar refrigeration control system comprises a solar panel, a charge controller, a storage battery pack, an inverter, a control system and a refrigeration system, wherein the output end of the solar panel is connected with the input end of the charge controller, the output end of the charge controller is respectively connected with the storage battery pack and the input end of the inverter, the output end of the inverter is connected with the control system, and the control system is also connected with the refrigeration system;
the refrigerating system comprises a semiconductor diode refrigerating sheet (1), a mixed cooling solution (2), radiating fins (3), a fan chamber (4) and a heat preservation chamber (9), wherein the semiconductor diode refrigerating sheet (1) is arranged on one side of the mixed cooling solution (2), the radiating fins (3) are arranged on the other side of the mixed cooling solution (2), the fan chamber (4) and the heat preservation chamber (9) are arranged on the outer sides of the radiating fins (3), a fan is arranged in the fan chamber (4), the heat preservation chamber (9) is connected with a heat preservation valve (5), a temperature sensor Ti (6) is arranged in the semiconductor diode refrigerating sheet (1), a temperature sensor Tw (7) is arranged at the radiating fins (3), and a temperature sensor TE (8) is arranged at an air outlet of the fan chamber (4);
the control method of the solar refrigeration control system comprises the following steps:
(1) when the temperature sensor Ti is detected to be higher than 0 ℃, the semiconductor diode refrigerating sheet (1) works, and when the temperature sensor Ti is detected to be lower than-1 ℃, the semiconductor diode refrigerating sheet stops working;
(2) detecting whether the TE of the temperature sensor is less than 30 ℃, and entering the step (3) if not; if the temperature sensor Tw is further detected to be larger than 53 ℃, opening the fan and the heat preservation valve, and if not, entering the step (3);
(3) closing the fan and the heat preservation valve, and ending the process;
(4) the semiconductor diode refrigerating sheet works, whether the temperature sensor Tw is larger than 53 ℃ is detected, if yes, the step (5) is carried out, and if not, the step (6) is carried out;
(5) opening the fan and the heat preservation valve until the temperature sensor Tw is detected to be less than 53 ℃, and entering the step (6);
(6) and closing the heat preservation valve to enter the heat preservation operation.
2. The control method of the solar refrigeration control system according to claim 1, characterized in that: the mixed cooling solution (2) adopts a mixed solution of sodium acetate trihydrate, ammonium acetate and a nucleating agent.
3. The control method of the solar refrigeration control system according to claim 2, characterized in that: the nucleating agent adopts borax.
4. The control method of the solar refrigeration control system according to claim 1, characterized in that: the heat preservation chamber (9) is positioned at the upper part of the fan chamber (4).
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| CN201810304331.2A CN108548350B (en) | 2018-04-08 | 2018-04-08 | Solar refrigeration control system and control method thereof |
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| CN108548350B true CN108548350B (en) | 2020-09-25 |
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| CN101767685A (en) * | 2010-01-21 | 2010-07-07 | 中国人民解放军南京军区南京总医院 | Medical refrigerated transport case |
| CN201865147U (en) * | 2010-07-30 | 2011-06-15 | 深圳安吉尔饮水产业集团有限公司 | Solar water producing machine |
| CA2879504A1 (en) * | 2012-07-18 | 2014-01-23 | University Of Virginia Patent Foundation | Heat transfer device for high heat flux applications and related methods thereof |
| EP2959237A1 (en) * | 2013-02-25 | 2015-12-30 | ZELISSEN, Marcus Jozef Gertrudis | Thermoelectric heat transferring system |
| CN105351899A (en) * | 2015-09-23 | 2016-02-24 | 华南理工大学 | LED heat-dissipating device adopting semiconductor refrigerating plate and phase change materials |
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