WO2015070714A1 - Floating-platform focusing solar energy comprehensive utilization system and method - Google Patents

Abstract

A floating-platform focusing solar energy comprehensive utilization system and method; the system comprises a floating platform (600) and the following assemblies installed on the floating platform (600): a solar energy heat collection system (100) at least for collecting solar energy via a focusing method, and heating a working medium provided by an energy storage system (200); an electricity generating system (300) at least for receiving the hot working medium heated by the solar energy heat collection system (100), and generating electricity; an air conditioning system (400) at least for receiving the second hot working medium outputted by the electricity generating system (300), and for heating and refrigeration; a sea water desalination system (500) at least for receiving the third hot working medium outputted by the air conditioning system (400), and desalinating sea water; a hot water system (700) at least for receiving the fourth hot working medium outputted by the sea water desalination system (500), and providing hot water; and an energy storage system (200) at least for receiving and outputting the hot working medium. The system and method thereof effectively utilize solar energy, has a high solar energy conversion efficiency, low energy consumption, small footprint and multiple functions, and can be used even on uninhabited islands.

Description

 Floating type focusing type solar energy comprehensive utilization system and method Technical field

The invention relates to a solar energy comprehensive utilization system, in particular to a floating focused solar energy comprehensive utilization system and method which have the functions of photothermal power generation, seawater desalination and air conditioning.

Background technique

As a clean energy source, solar energy has the incomparable superiority of fossil energy. Specifically, solar energy is both primary energy and renewable energy. It is rich in resources, can be used free of charge, without transportation, and has no pollution to the environment. It has become the most eye-catching, most developed and widely used. clean energy.

At present, there are two main types of solar energy utilization technologies, one is solar photovoltaic power generation technology, and the other is solar thermal power generation technology. Because of the low efficiency and high cost, and the manufacturing process of silicon wafer is a process of high energy consumption, high water consumption and high pollution, solar photovoltaic power generation technology is not clean energy as a whole, but solar thermal power generation technology is not. This defect. A common solar thermal power generation technology is mainly to use solar energy to convert circulating water into steam to drive turbine generators, so it can also be named solar concentrating thermoelectric technology.

In general, the existing solar thermal power generation technology is mainly applied on land, but it is still less applied to coastal areas or marine areas, and solar energy utilization efficiency is still relatively low.

Moreover, with the rapid development of China's economy and society and the continuous advancement of urbanization, water shortage has become an important factor restricting the sustainable development of China's social economy, especially in coastal areas with large economic aggregates and high population density. The lack of water resources will become a major issue concerning the economic and social development and the living space of future generations. Desalination is an effective means to increase the amount of water resources from the source. Desalination as a strategic choice to solve the problem of lack of fresh water resources is not only a consideration of the level of water quality or technical advantages, but also the inevitable requirement for ensuring national security and sustainable development. It is an inevitable choice for the future survival and development of coastal areas.

By the end of 2010, more than 150 countries and regions around the world have utilized desalination technology, and 1 has been built and under construction desalination plants. More than 50,000, with a total installed capacity of 71.7 million tons / day. Municipal water supply is the main application area of seawater desalination. Among the installed capacity, municipal water supply accounts for the highest proportion. 3.1%. The problem of domestic water consumption of more than 200 million people has been solved; followed by industry and electricity, accounting for 31.4%; the remaining uses account for about 5%.

China has the superior conditions for the development of seawater desalination, including: First, with the implementation of the development plan of a series of coastal areas from north to south approved by the state, the economic and social development of China's coastal areas will enter a new fast during the 12th Five-Year Plan period. During the development period, this provided a solid social and economic foundation for the development of seawater desalination; secondly, the coastline of China’s mainland has a total length of more than 18,000 kilometers, with 1 50 or so coastal cities, more than 6 5 0 5 0 More than 0 square meters of islands, this is a favorable geographical condition for the development of seawater desalination in China. In a country with the world's largest population in the world, the second largest economy in the world, and the shortage of fresh water resources, the situation that seawater desalination core equipment mainly relies on imports must be changed as soon as possible. This is not only a requirement for the development of China's desalination industry, but also a guarantee. National security and the requirements for sustainable socio-economic development.

technical problem

However, it should also be noted that China's desalination of seawater also faces many challenges. Specifically, it has the following aspects: First, the research on key technologies for desalination is not solid, and the development of core equipment is not enough; Second, the lack of large-scale desalination equipment processing and manufacturing And engineering practice of operation and maintenance; third, the integration of key equipment manufacturing processes is not high, the equipment is not enough, and the localization rate is low; Fourth, the seawater desalination standard system, the construction of policies and regulations are relatively lagging behind; the fifth is facing enormous international competitive pressure.

Technical solution

One of the objects of the present invention is to provide a floating-focus solar energy comprehensive utilization system, which has the functions of photothermal power generation, seawater desalination, air conditioning, etc., and can fully utilize solar energy in coastal areas and marine areas, and its structure. It is simple and easy to operate, thereby overcoming the deficiencies in the prior art.

Another object of the present invention is to provide a method for comprehensive utilization of floating-focus solar energy.

In order to achieve the above object, the present invention adopts the following technical solutions:

A floating-focus solar energy comprehensive utilization system, comprising:

At least one floating platform,

At least a solar collector system for collecting solar energy in a focused manner and heating the working medium provided by at least one energy storage system,

a power generation system for receiving at least a thermal medium formed by heating of a solar heat collecting system and generating electricity,

An air conditioning system for receiving at least a secondary thermal medium output by a power generation system and performing indoor heating or cooling of the building,

At least a seawater desalination system for receiving reheating or solar energy output by the air conditioning system and performing seawater desalination,

a hot water system for receiving at least a lower thermal medium output by the seawater desalination system and performing heat exchange;

At least an energy storage system for supplying a hot working medium to a power generation system and receiving a low thermal working fluid output from the hot water system;

Wherein, the solar heat collecting system, the energy storage system, the power generation system, the air conditioning system, the seawater desalination system and the hot water system are all installed on the floating platform.

As one of the more preferred embodiments, the solar energy utilization system includes a plurality of floating platforms arranged in an array.

As one of the more preferable embodiments, the solar heat collecting system, the energy storage system, the power generation system, the air conditioning system, the seawater desalination system, and the hot water system are installed on at least one floating platform.

As one of the more preferred embodiments, the solar heat collecting system, the energy storage system, the power generation system, the air conditioning system, and the seawater desalination system are discretely distributed on more than two floating platforms.

Further, the floating platform is fixedly connected to a fixed pillar formed on the island and the reef.

As one of the more preferred embodiments, the pontoon includes a hollow pontoon body, and the pontoon body cavity is partitioned into a plurality of compartments.

A method for comprehensive utilization of floating-focus solar energy, comprising:

Provide floating platform, and install solar collector system, energy storage system, power generation system, air conditioning system, desalination system and radar system and meteorological equipment to be installed on the floating platform.

The solar collector system collects the solar energy in a focused manner, heats the working fluid in the energy storage system, forms a thermal working medium, and then transports the thermal working medium into the power generation system for power generation, and then sends the secondary thermal working fluid output from the power generation system. Into the air conditioning system, heating or cooling the building interior, and then input the reheating fluid output from the air conditioning system or the electric power input system to the seawater desalination system to desalinate the seawater, and then output the seawater desalination system more The hot working fluid is input into the hot water system; the low thermal working fluid output from the hot water system is again input into the energy storage system, and is again heated by the solar heat collecting system, and continues to circulate.

As one of the more preferable embodiments, the solar energy comprehensive utilization method further comprises: after the hot working fluid outputted by the seawater desalination system flows through the hot water system, and then enters the energy storage system.

As one of the more preferable embodiments, the temperature of the hot working medium is 300 ° C or higher, the temperature of the lower hot working medium is 80 ° C or lower, and the temperature of the low hot working medium is 50 ° C or lower.

Further, the power generation system includes a waste heat generator for generating electricity, and the air conditioning system includes an absorption type lithium bromide central air conditioner, an adsorption type air conditioner, and is not limited thereto.

Beneficial effect

Compared with the prior art, the present invention has at least the following advantages: the floating-focus solar energy comprehensive utilization system realizes effective use of the clean energy of solar energy, and has high solar energy conversion efficiency, low energy consumption and small land occupation, and Both energy storage, power generation, air conditioning, desalination and heating Can produce significant social and economic benefits.

DRAWINGS

Figure 1 is a schematic diagram of a preferred embodiment of the present invention;

2 is a schematic structural view of a seawater desalination system according to a preferred embodiment of the present invention;

3 is a top plan view of a floating platform in accordance with a preferred embodiment of the present invention;

Figure 4 is a cross-sectional view of a floating platform in accordance with a preferred embodiment of the present invention;

Figure 5 is a top plan view of a floating stage array in accordance with a preferred embodiment of the present invention;

6 is a schematic view showing a fixing structure of a floating platform according to a preferred embodiment of the present invention;

The components indicated by the reference numerals in the figures are: solar collector system 100, energy storage system 200, power generation system 300, air conditioning system 400, seawater desalination system 500, floating platform 600, hot water system 700, fixed Pillar 800; Fig. 2 one-effect evaporator 1, two-effect evaporator 2, three-effect evaporator 3, four-effect evaporator 4, starting vacuum system 5, seawater filter 6, condenser 7, steam heat compressor ( TVC) 8, running vacuum system 9, integrated dosing device 10, brine pump 11, product water pump 12, one-effect condensate pump 13, concentrated brine heat recovery period 14, one-effect condensate cooler 15, product water cooling Apparatus 16, reducing agent dosing system 17, heating steam desuperheating device 18, a-heated steam, b-condensed water discharge, c-cooled seawater discharge, d-finished water discharge, e-pretreatment system into seawater, f- Concentrated brine discharge, g-cooled seawater discharge.

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the invention

The technical solutions of the present invention are further described below in conjunction with the accompanying drawings and preferred embodiments.

Referring to FIG. 1 , FIG. 3 and FIG. 4 , as a preferred embodiment of the present invention, the floating-focus solar energy comprehensive utilization system may include at least one floating platform 600 , a plurality of solar heat collecting systems 100 , a power generation system 300 , and an air conditioning system . 400, seawater desalination system 500, hot water system 700 and energy storage system 200, wherein the solar heat collection system, energy storage system, power generation system, air conditioning system, seawater desalination system, hot water system are installed on the floating platform on.

The working process may be: collecting the solar energy in a focused manner by the solar heat collecting system, heating the working medium in the energy storage system to form a thermal working medium, and then transferring the thermal working medium into the power generation system for power generation; The secondary thermal working fluid outputted by the system is sent to the air conditioning system for heating or cooling in the building room; then the reheating fluid output from the air conditioning system is input into the seawater desalination system for desalination; the thermal output of the desalination system is further heated. The hot water input system; the low thermal working fluid output from the hot water system is again input into the energy storage system, and is again heated by the solar collector system and continues to circulate.

Further, referring to Fig. 6, the aforementioned floating platform can be fixed by a fixed pillar formed on an island reef.

Therefore, when the floating-focus solar integrated utilization system is applied, it is only necessary to install a focusing solar collector system, a desalination device, and the like on a floating platform, and is equipped with an air conditioner or the like. The pontoon is pulled to a predetermined sea area by a tugboat or the like, and is fixedly connected to a fixed pillar formed on the reef or a fixed pillar deep into the seabed.

Referring to FIG. 3 and FIG. 4 again, as one of the more preferred embodiments, the floating platform includes a hollow floating platform body, and the floating body body cavity is divided into a plurality of compartments.

Further, part of the cabin of the floating platform is filled with seawater for use as a sedimentation tank, and some of the tanks are used as a freshwater pool and a salt pool. Other cabins can be fitted with portholes, air conditioning and other living facilities for use by staff.

As one of the corresponding specific embodiments, the specific operation of the solar energy comprehensive utilization system by using the floating platform of the structure may be: constructing a production base on the mainland beach, and having a dock. After going to the sea, a number of solar collectors can be installed on one or more floating platforms to form a solar collector system, which is called “solar collector pontoon” and is numbered; The desalination equipment can be installed on one or several floating platforms, which is called “water desalination equipment floating platform”. Among them, some "solar collectors floating platform" upper compartment air conditioning system, etc., can be used as personnel living quarters, storage collateral, It can store essential food and vegetable or storage missiles and other military supplies, and use these floating platforms to form various offshore factories and sea villas. Serve the needs of island reefs and islands. Of course, solar collector systems, energy storage systems, power generation systems, air conditioning systems, and desalination systems can also be installed on the same floating platform, and they can be layered or divided into different compartments. Then, use a tugboat to drag the pontoon to a fixed location on the desired island or island reef. The pontoon is filled with seawater to make the pontoon sink to the pillars on the reef, so that the pontoon can be firmly fixed. In particular, multiple pontoons can be connected to each other to form a large piece (1000m3). / Solar solar desalination needs to occupy an area of about 20 acres) into an offshore platform (see Figure 5), its stability and self-sustainability. Among them, the bottom compartment of some floating platforms can be used as a seawater sedimentation tank, and the upper compartment can be used as a freshwater pool, a concentrated salt water tank, a living compartment, a storage compartment, and the like.

As one of the more specific embodiments, the positions of the components in the floating-focus solar integrated utilization system may be:

1. Install the solar collector system on the "deck" of the floating platform and connect it to the "floating platform".

2. The energy storage system can be installed in the upper compartment of several "solar heat collecting floating platforms".

3. The power generation equipment is also installed in the cabins of several other “solar heat collecting floating platforms”.

4. Install desalination equipment in the cabin of the dedicated floating platform, and install a solar collector system on the deck.

5. The bottom tank of the general floating platform can be used as a seawater sedimentation tank, and the upper tank is used as a freshwater pool, a concentrated salt water tank, a living compartment, a storage compartment, and the like.

In a more specific embodiment, the working process of the floating-focus solar integrated utilization system can be:

The focusing type heat collecting system (ie, the solar heat collecting system) heats the high temperature heat conducting medium (ie, the working medium is heated to above 300 ° C), and the high temperature heat conducting medium is sent to the energy storage system for storage; the high temperature heat conducting medium is sent by the high temperature pump The waste heat generator (ie, power generation system) generates electricity; the waste heat medium and the electricity generated by the waste heat generator, the seawater desalination equipment acts as an energy source to desalinate seawater, and the distilled seawater desalination uses vacuum distillation at 70 ° C (even lower temperature) When the seawater is evaporated, it can solve the problem of scaling. The membrane type directly uses solar energy to make the seawater desalination; at the same time, it is sent to an air conditioning system (such as an adsorption or absorption air conditioner) to provide a comfortable living environment or a suitable storage environment (constant temperature warehouse); waste heat discharged The medium (more hot working medium) supplies hot water to the people through the hot water system, and the low-heat working medium from the hot water system is heated into the solar heat collecting system. Complete the closed loop.

For the aforementioned seawater desalination system; as one of the specific application examples, it is a low-temperature distillation seawater desalination system, which can adopt the structural design shown in Fig. 2, which mainly adopts a membrane type or low-temperature seawater desalination process, and the main equipment of low-temperature seawater desalination may include One-effect evaporator 1, two-effect evaporator 2, three-effect evaporator 3, four-effect evaporator 4, starting vacuum system 5, seawater filter 6, condenser 7, steam heat compressor (TVC) 8, operation Vacuum system 9, integrated dosing device 10, brine pump 11, product water pump 12, one-effect condensate pump 13, concentrated brine heat recovery period 14, one-effect condensate cooler 15, product water cooler 16, reducing agent The dosing system 17, the heating steam desuperheating device 18, and the like. The working principle is known to those skilled in the art according to the prior art, and has the characteristics of technical reliability, simple maintenance, and the like, and details are not described herein again.

In addition, the aforementioned solar heat collecting system is a novel focusing type heat collecting system, and the automatic tracking system is controlled by a single chip microcomputer, and adopts automatic tracking rotation synchronized with the earth operation. The aforementioned energy storage system can employ techniques commonly used for thermal storage. The aforementioned power generation system can use waste heat power generation and an organic Rankine power generation system. The aforementioned air conditioning system can use lithium bromide absorption type central air conditioning or adsorption air conditioning technology. The aforementioned heating system can use water heaters and central heating (hot water or heat medium) technology.

In particular, the present invention can realize large-scale implementation of a membrane type or low-temperature multi-effect distillation seawater desalination project, and has achieved a membrane-type or low-temperature multi-effect distillation seawater desalination of 50,000-100,000 tons/day, thereby It has produced significant social and economic benefits.

It should be noted that the above embodiments are only for illustrating the present invention. In addition to the contents, there are other embodiments of the present invention. However, any technical solution formed by equivalent replacement or equivalent deformation is within the scope of the present invention.

Industrial applicability

Sequence table free content

Claims (9)

1. A floating-focus solar energy comprehensive utilization system, comprising:

   At least one floating platform

   At least a solar collector system for collecting solar energy in a focused manner and heating the working medium provided by at least one energy storage system;

   a power generation system for receiving at least a thermal medium formed by heating of a solar heat collecting system and generating electricity;

   An air conditioning system for receiving at least a secondary thermal medium output by the power generation system and performing indoor heating or cooling of the building;

   a seawater desalination system for receiving at least a reheating or solar energy output by the air conditioning system and performing seawater desalination;

   a hot water system for receiving at least a lower thermal medium output by the seawater desalination system and performing heat exchange;

   At least an energy storage system for supplying a hot working medium to a power generation system and receiving a low thermal working fluid output from the hot water system;

   Wherein, the solar heat collecting system, the energy storage system, the power generation system, the air conditioning system, the seawater desalination system and the hot water system are all installed on the floating platform.
2. The floating-focus solar integrated utilization system according to claim 1, characterized in that it comprises a plurality of floating stages arranged in an array.
3. The floating-focus solar energy comprehensive utilization system according to claim 2, wherein the solar collector system, the energy storage system, the power generation system, the air conditioning system, the seawater desalination system, and the heat are installed on at least one of the floating stages. The water system; or the solar heat collecting system, the energy storage system, the power generation system, the air conditioning system, the seawater desalination system, and the hot water system are discretely distributed on more than two floating platforms.
4. The floating-focus solar energy comprehensive utilization system according to claim 1, wherein the floating platform is fixedly coupled to a fixed pillar formed on an island or a reef.
5. The floating-focus solar energy comprehensive utilization system according to any one of claims 1 to 4, wherein the floating platform comprises a hollow floating platform body, and the floating chamber body cavity is divided into a plurality of cabin.
6. A floating-focus solar energy comprehensive utilization method, comprising: providing a floating platform, and installing a solar heat collecting system, an energy storage system, a power generation system, an air conditioning system, and a seawater desalination system on the floating platform; the solar heat collecting system After the solar energy is concentrated in a focused manner, the working medium in the energy storage system is heated to form a thermal working medium, and then the thermal working medium is transported into the power generation system for power generation; and the secondary thermal working fluid output from the power generation system is sent to the air conditioning system. Heating or cooling the building interior; then inputting the reheating fluid output from the air conditioning system into the seawater desalination system for desalination, or directly feeding the solar power into the seawater desalination system for desalination; thereafter, desalinating the seawater The secondary heat input system of the system outputs the hot water system, and the low-heat working fluid output from the hot water system is input into the energy storage system, and is heated again by the solar heat collecting system, and continues to circulate.
7. The method for comprehensive utilization of a floating-focus solar energy system according to claim 6, further comprising: flowing a secondary heat medium outputted by the seawater desalination system through the hot water system, and then entering the energy storage device system.
8. The method for comprehensive utilization of a floating-focus solar energy according to claim 6, wherein the temperature of the hot working medium is above 300 ° C, and the temperature of the hot working medium is below 80 ° C, the low thermal work. The temperature is below 50 °C.
9. The floating-focus solar energy comprehensive utilization method according to claim 6, wherein the power generation system comprises a waste heat generator for generating electricity, and the air conditioning system comprises an absorption type lithium bromide central air conditioner and/or an adsorption type air conditioner.