CN105508158B - Natural gas distributed energy system coupled with solar energy - Google Patents
Natural gas distributed energy system coupled with solar energy Download PDFInfo
- Publication number
- CN105508158B CN105508158B CN201511001532.8A CN201511001532A CN105508158B CN 105508158 B CN105508158 B CN 105508158B CN 201511001532 A CN201511001532 A CN 201511001532A CN 105508158 B CN105508158 B CN 105508158B
- Authority
- CN
- China
- Prior art keywords
- natural gas
- hot water
- waste heat
- utilization device
- heat utilization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 256
- 239000003345 natural gas Substances 0.000 title claims abstract description 128
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 239000002918 waste heat Substances 0.000 claims abstract description 63
- 239000007789 gas Substances 0.000 claims abstract description 50
- 238000002485 combustion reaction Methods 0.000 claims abstract description 23
- 238000005338 heat storage Methods 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 20
- 238000000034 method Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 7
- 238000010248 power generation Methods 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
一种耦合太阳能的天然气分布式能源系统，包括：燃气轮机发电机组、余热利用装置、太阳能集热系统等，其中，天然气顺次经过两级天然气加热器后进入燃烧室；空气经过压气机后进入燃烧室，空气与天然气在燃烧室内燃烧后进入燃气透平；燃气透平排气进入余热利用装置，余热利用装置的排气进入大气；太阳能集热系统产生的热水作为第一级天然气加热器的热源，余热利用装置产生的热水作为第二级天然气加热器的热源；天然气优先在第一级加热器中加热至额定温度，不足部分在第二级加热器中加热；热水用户的热水需求优先由余热利用装置满足，不足部分由太阳能集热系统提供；蒸汽用户的蒸汽需求由余热利用装置产生并满足。
A natural gas distributed energy system coupled with solar energy, including: a gas turbine generator set, a waste heat utilization device, a solar heat collection system, etc., wherein the natural gas enters the combustion chamber after passing through the two-stage natural gas heater; the air enters the combustion chamber after passing through the compressor The air and natural gas enter the gas turbine after combustion in the combustion chamber; the exhaust gas of the gas turbine enters the waste heat utilization device, and the exhaust gas of the waste heat utilization device enters the atmosphere; the hot water generated by the solar heat collection system is used as the first-stage natural gas heater. Heat source, the hot water generated by the waste heat utilization device is used as the heat source of the second-stage natural gas heater; natural gas is preferentially heated to the rated temperature in the first-stage heater, and the insufficient part is heated in the second-stage heater; hot water for hot water users The demand is first met by the waste heat utilization device, and the insufficient part is provided by the solar heat collection system; the steam demand of the steam user is generated and satisfied by the waste heat utilization device.
Description
技术领域：Technical field:
本发明属于能源利用技术领域，具体涉及一种耦合太阳能的天然气分布式能源系统。The invention belongs to the technical field of energy utilization, and in particular relates to a natural gas distributed energy system coupled with solar energy.
背景技术：Background technique:
分布式能源系统是相对于传统集中式供能方式而言的供能系统，分布式能源系统直接面向用户，按用户的需求就地生产并供应能量，是具有多种功能，可满足多重目标的能量转换利用系统。与传统集中式供能方式相比，分布式能源接近用户侧，不需要建设大电网、大热网，避免了能源的远距离输送，可节省建设投资，并减少了线路损失和运行费用。分布式能源可以有分布式光伏、分布式风能、天然气分布式能源系统(也称天然气冷热电三联供系统)等多种形式。天然气分布式能源系统由燃气轮机、余热锅炉、汽轮机、吸收式热泵和制冷机等设备组成，其兼备发电、供热、制冷等多种能源供应功能，可以有效实现能源的梯级利用，达到超过70％的能源综合利用率。相比其他分布式能源系统，天然气分布式能源系统具有能量输出稳定且多样的优势，尤其适合于具有多种能源需求(电力、热水、冷水、蒸汽等)的工业园区和建筑群。The distributed energy system is an energy supply system compared to the traditional centralized energy supply method. The distributed energy system is directly oriented to the user, and produces and supplies energy on the spot according to the user's needs. It has multiple functions and can meet multiple goals. Energy conversion utilization system. Compared with the traditional centralized energy supply method, distributed energy is close to the user side, does not need to build a large power grid or a large heating network, avoids long-distance energy transmission, saves construction investment, and reduces line losses and operating costs. Distributed energy can have various forms such as distributed photovoltaics, distributed wind energy, and natural gas distributed energy systems (also known as natural gas combined cooling, heating, power, and electricity systems). The natural gas distributed energy system is composed of gas turbines, waste heat boilers, steam turbines, absorption heat pumps, and refrigerators. It has multiple energy supply functions such as power generation, heating, and refrigeration, and can effectively realize cascade utilization of energy, reaching more than 70%. comprehensive utilization of energy. Compared with other distributed energy systems, natural gas distributed energy systems have the advantages of stable and diverse energy output, and are especially suitable for industrial parks and buildings with multiple energy needs (electricity, hot water, cold water, steam, etc.).
燃气轮机是天然气分布式能源系统的关键设备，通常为满足燃气轮机对天然气燃料品质的要求，会在天然气外部管网和燃气轮机之间设置调压站和前置预处理模块。调压站主要对进厂的天然气进行粗过滤和调压，前置预处理模块主要包括天然气精过滤和加热单元。天然气温度是燃料品质的关键参数，影响天然气分布式能源系统的安全和高效运行，主要有两方面原因：一是由于焦耳-汤普森效应，天然气会在调压站降压过程中降温，容易产生凝析水或使碳氢化合物液化，会对输送设备造成损伤或使管道外表面结冰，因此燃气轮机厂商均会要求机组的燃料入口温度在一定范围内，而不同机型的具体要求有所不同，例如GE PG6581B机组要求燃料入口温度至少超过天然气露点28℃，但最高温度不超过125℃，GE PG9171E要求燃料入口温度至少超过天然气露点28℃，但最高温度不超过70℃；二是燃气轮机的热效率和燃烧室的动态特性受天然气温度影响很大，因此天然气在进入燃烧室之前必须精确控制温度，例如GE采用DLN2.0+燃烧系统的9F机型(典型如9F.03，9F.05等)，其要求在机组并网之前采用电加热器进行天然气加热，当机组并网后投入天然气性能加热器，最终使天然气温度达到额定运行参数185℃。The gas turbine is the key equipment of the natural gas distributed energy system. Usually, in order to meet the requirements of the gas turbine for the quality of the natural gas fuel, a pressure regulating station and a pre-processing module are installed between the external natural gas pipeline network and the gas turbine. The pressure regulating station mainly performs coarse filtration and pressure regulation on the natural gas entering the plant, and the pre-processing module mainly includes natural gas fine filtration and heating units. The temperature of natural gas is a key parameter of fuel quality, which affects the safe and efficient operation of natural gas distributed energy systems. There are two main reasons. Water separation or liquefaction of hydrocarbons will damage the transportation equipment or freeze the outer surface of the pipeline. Therefore, gas turbine manufacturers require the fuel inlet temperature of the unit to be within a certain range, and the specific requirements of different models are different. For example, the GE PG6581B unit requires the fuel inlet temperature to exceed the natural gas dew point by at least 28°C, but the maximum temperature does not exceed 125°C; GE PG9171E requires the fuel inlet temperature to exceed the natural gas dew point by at least 28°C, but the maximum temperature does not exceed 70°C; the second is the thermal efficiency and The dynamic characteristics of the combustion chamber are greatly affected by the temperature of the natural gas, so the temperature of the natural gas must be precisely controlled before entering the combustion chamber. It requires electric heaters to be used for natural gas heating before the unit is connected to the grid, and a natural gas performance heater is used after the unit is connected to the grid, so that the natural gas temperature reaches the rated operating parameter of 185°C.
现有天然气加热技术主要采用电加热、水浴加热、汽轮机抽汽加热、余热锅炉出口热水加热等方式。这几种加热方式均为高能低用，最终均会消耗高品位的化石能源，降低了天然气分布式能源系统或联合循环发电系统的能源利用率。The existing natural gas heating technology mainly adopts electric heating, water bath heating, steam turbine extraction heating, waste heat boiler outlet hot water heating and other methods. These kinds of heating methods are all high-energy and low-use, and will eventually consume high-grade fossil energy, reducing the energy utilization rate of natural gas distributed energy systems or combined cycle power generation systems.
太阳能是一种清洁、无污染的可再生能源，其开发利用被世界各国公认为能源战略的重要组成部分。太阳能热利用是太阳能利用的主要方式之一。按照工质的温度，太阳能热利用可分为低温、中温、高温三种类型。由于太阳辐射具有分散性强，能流密度低的特点，适合输出得到中低温热源，因此中、低温热利用是目前太阳能低成本、规模化应用最重要的领域。太阳能集热技术是太阳能中、低温热利用技术的一种，主要包括真空管集热和平板集热两种方式，其技术成熟且节能效果显著，现已广泛应用于我国居民热水供应领域。但由于太阳能存在自身连续性差的特点，难以保证可靠的热源输出，若用于区域供热，蓄热系统将十分庞大，且由于所输出的热源品位较低，难以获得低成本的高效利用。Solar energy is a clean, non-polluting renewable energy, and its development and utilization is recognized as an important part of energy strategy by countries all over the world. Solar thermal utilization is one of the main ways of solar energy utilization. According to the temperature of the working medium, solar thermal utilization can be divided into three types: low temperature, medium temperature and high temperature. Since solar radiation has the characteristics of strong dispersion and low energy flux density, it is suitable for output to obtain medium and low temperature heat sources. Therefore, medium and low temperature heat utilization is currently the most important field for low-cost and large-scale application of solar energy. Solar heat collection technology is a kind of medium and low temperature heat utilization technology of solar energy. It mainly includes two methods of vacuum tube heat collection and flat plate heat collection. Its technology is mature and its energy saving effect is remarkable. However, due to the poor continuity of solar energy, it is difficult to ensure a reliable heat source output. If it is used for district heating, the heat storage system will be very large, and because the output heat source is of low grade, it is difficult to obtain low-cost and efficient utilization.
发明内容：Invention content:
本发明的目的在于克服现有技术存在的不足，提供了一种耦合太阳能的天然气分布式能源系统。该系统以能的梯级利用为原则，通过太阳能集热器产生中低温热水，加热燃气轮机所需的天然气，使低品位热能进入高温布雷顿循环，提高了中低温太阳能的应用能级，并与余热利用装置一起满足用户侧终端热负荷需求，达到可再生能源与天然气分布式能源的优势互补，获得稳定的太阳能热利用，降低了化石能源的消耗，提高了分布式能源系统的经济性。The purpose of the present invention is to overcome the deficiencies in the prior art and provide a natural gas distributed energy system coupled with solar energy. Based on the principle of cascade utilization of energy, the system generates medium and low temperature hot water through solar collectors, heats the natural gas required by the gas turbine, and makes low-grade heat energy enter the high-temperature Brayton cycle, which improves the application energy level of medium and low temperature solar energy. The waste heat utilization device meets the heat load demand of the user-side terminal together, achieves the complementary advantages of renewable energy and natural gas distributed energy, obtains stable solar heat utilization, reduces the consumption of fossil energy, and improves the economy of the distributed energy system.
为达到上述目的，本发明采用以下技术方案来实现的：In order to achieve the above object, the present invention adopts the following technical solutions to realize:
一种耦合太阳能的天然气分布式能源系统，包括燃气轮机发电机组、余热利用装置、太阳能集热系统、储热水箱、热水用户、蒸汽用户以及天然气加热器；其中，A natural gas distributed energy system coupled with solar energy, including a gas turbine generator set, a waste heat utilization device, a solar heat collection system, a hot water storage tank, a hot water user, a steam user, and a natural gas heater; wherein,
燃气轮机发电机组上设置有天然气入口、空气入口以及排气口，天然气加热器上设置有天然气出入口，天然气加热器的出口连接至燃气轮机发电机组的天然气入口，燃气轮机发电机组的排气口连接至余热利用装置的排气入口，余热利用装置上设置有排气排空出口；The gas turbine generator set is provided with a natural gas inlet, air inlet and exhaust port, and the natural gas heater is provided with a natural gas inlet and outlet. The outlet of the natural gas heater is connected to the natural gas inlet of the gas turbine generator set, and the exhaust port of the gas turbine generator set is connected to the waste heat utilization The exhaust inlet of the device, and the waste heat utilization device is provided with an exhaust outlet;
太阳能集热系统与储热水箱之间组成热水循环系统，储热水箱与天然气加热器之间、储热水箱与热水用户之间均组成热水循环系统；热水用户与余热利用装置之间组成热水循环系统，余热利用装置与天然气加热器之间组成热水循环系统，且余热利用装置上设置有蒸汽出口，该蒸汽出口连接至蒸汽用户。The hot water circulation system is formed between the solar heat collection system and the hot water storage tank, the hot water circulation system is formed between the hot water storage tank and the natural gas heater, and between the hot water storage tank and the hot water user; the hot water user and the waste heat A hot water circulation system is formed between the utilization devices, and a hot water circulation system is formed between the waste heat utilization device and the natural gas heater, and a steam outlet is provided on the waste heat utilization device, and the steam outlet is connected to the steam user.
本发明进一步的改进在于，燃气轮机发电机组包括依次连接的压气机、燃烧室、燃气透平和发电机，其中，压气机上设置有空气入口，燃烧室上设置有天然气入口，燃气透平上设置有排气口，且燃气透平用于驱动发电机发电。The further improvement of the present invention is that the gas turbine generating set includes a compressor, a combustion chamber, a gas turbine and a generator connected in sequence, wherein, the compressor is provided with an air inlet, the combustion chamber is provided with a natural gas inlet, and the gas turbine is provided with an exhaust gas inlet. The gas port, and the gas turbine is used to drive the generator to generate electricity.
本发明进一步的改进在于，天然气加热器包括依次连接的第一级然气加热器和第二级天然气加热器，储热水箱与第一级然气加热器之间组成热水循环系统，余热利用装置与第二级天然气加热器之间组成热水循环系统。A further improvement of the present invention is that the natural gas heater includes a first-stage natural gas heater and a second-stage natural gas heater connected in sequence, and a hot water circulation system is formed between the hot water storage tank and the first-stage natural gas heater, and the waste heat A hot water circulation system is formed between the utilization device and the second-stage natural gas heater.
本发明进一步的改进在于，余热利用装置为余热锅炉或余热锅炉和汽轮机发电机组的组合。A further improvement of the present invention is that the waste heat utilization device is a waste heat boiler or a combination of a waste heat boiler and a steam turbine generator set.
本发明进一步的改进在于，太阳能集热系统采用真空管或平板型太阳能集热系统。A further improvement of the present invention is that the solar heat collection system adopts a vacuum tube or a flat plate type solar heat collection system.
本发明进一步的改进在于，储热水箱与天然气加热器之间组成的热水循环系统管道上设置有第一阀门，储热水箱与热水用户之间均组成的热水循环系统管道上设置有第二阀门和第三阀门，热水用户与余热利用装置之间组成的热水循环系统管道上设置有第四阀门和第五阀门，余热利用装置与天然气加热器之间组成的热水循环系统管道上设置有第六阀门。The further improvement of the present invention lies in that a first valve is arranged on the hot water circulation system pipeline formed between the hot water storage tank and the natural gas heater, and a first valve is provided on the hot water circulation system pipeline formed between the hot water storage tank and the hot water user. The second valve and the third valve are set, the hot water circulation system pipeline formed between the hot water user and the waste heat utilization device is provided with the fourth valve and the fifth valve, the hot water formed between the waste heat utilization device and the natural gas heater The circulation system pipeline is provided with a sixth valve.
本发明进一步的改进在于，工作时，天然气经过天然气加热器后进入燃烧室；空气经过压气机后进入燃烧室，空气与天然气在燃烧室内燃烧后进入燃气透平；燃气透平排气进入余热利用装置，余热利用装置的排气进入大气；太阳能集热系统产生热水进入储热水箱，热水在储热水箱与天然气加热器之间、储热水箱与热水用户之间、热水用户与余热利用装置之间、余热利用装置与天然气加热器之间循环，且余热利用装置为蒸汽用户提供水蒸汽。The further improvement of the present invention is that when working, the natural gas enters the combustion chamber after passing through the natural gas heater; the air enters the combustion chamber after passing through the compressor, and the air and natural gas enter the gas turbine after being combusted in the combustion chamber; the exhaust gas of the gas turbine enters the waste heat utilization The exhaust of the waste heat utilization device enters the atmosphere; the hot water generated by the solar heat collection system enters the hot water storage tank, and the hot water is between the hot water storage tank and the natural gas heater, between the hot water storage tank and the hot water user, and between the hot water storage tank and the hot water user. There is circulation between the water user and the waste heat utilization device, between the waste heat utilization device and the natural gas heater, and the waste heat utilization device provides steam for the steam user.
相对于现有技术。本发明的有益效果是：compared to existing technologies. The beneficial effects of the present invention are:
本发明采用太阳能、天然气相耦合的分布式供能方式，利用天然气分布式能源输出稳定的特点，使太阳能获得稳定利用，解决了单独太阳能供能系统持续性差，蓄热系统庞大的缺点。The invention adopts a distributed energy supply mode coupled with solar energy and natural gas, utilizes the characteristics of stable output of natural gas distributed energy, enables stable utilization of solar energy, and solves the shortcomings of poor sustainability of a single solar energy supply system and a large heat storage system.
本发明相比单独的天然气分布式能源系统，在获得相同的电、热(冷)输出的情况下，以可再生能源供热(冷)，替代部分化石能源消耗，达到节能减排的有益效果。Compared with a separate natural gas distributed energy system, the present invention uses renewable energy for heating (cold) to replace part of fossil energy consumption under the condition of obtaining the same electricity and heat (cold) output, and achieves the beneficial effect of energy saving and emission reduction .
本发明采用太阳能加热天然气，可以减少天然气加热单元化石能源的消耗，如采用GE PG6581B燃气轮机和双压非再热蒸汽系统的区域型分布式能源系统，原天然气加热单元采用低压省煤器出口热水为热媒将天然气从25℃加热到125℃，当加热单元改由太阳能为热源时，系统发电效率可提高约0.1个百分点，按年利用小时数5000计算，年可节约天然气约7万方。The present invention uses solar energy to heat natural gas, which can reduce the consumption of fossil energy in the natural gas heating unit. For example, a regional distributed energy system adopts GE PG6581B gas turbine and dual-pressure non-reheating steam system. The original natural gas heating unit uses low-pressure economizer to export hot water Natural gas is used as heat medium to heat natural gas from 25°C to 125°C. When the heating unit is replaced by solar energy as the heat source, the power generation efficiency of the system can be increased by about 0.1 percentage points. Calculated based on the annual utilization hours of 5,000, the annual natural gas savings can be about 70,000 cubic meters.
本发明将太阳能集热系统获得的低品位热能优先输入燃气轮机的高温布雷顿循环发电，提高了中、低温太阳能的应用能级，实现了低温热能的跨级利用，提高了分布式能源系统的发电效率，如采用GE PG6581B燃气轮机和双压非再热蒸汽系统的区域型分布式能源系统，可利用太阳能将天然气从25℃加热到125℃，相比天然气温度为25℃的工况，天然气加热后系统发电效率可以提高0.2个百分点。In the invention, the low-grade heat energy obtained by the solar heat collection system is preferentially input into the high-temperature Brayton cycle power generation of the gas turbine, which improves the application energy level of medium and low-temperature solar energy, realizes the cross-level utilization of low-temperature heat energy, and improves the power generation of the distributed energy system Efficiency, such as a regional distributed energy system using a GE PG6581B gas turbine and a dual-pressure non-reheating steam system, can use solar energy to heat natural gas from 25°C to 125°C. The power generation efficiency of the system can be increased by 0.2 percentage points.
综上所述，本发明采用太阳能与天然气相耦合的供能方式，利用天然气分布式能源输出稳定的特点，使太阳能获得稳定利用，解决了单独太阳能供能系统持续性差、蓄热系统庞大的缺点；相比单独的天然气分布式能源系统，在获得相同的电、热(冷)输出的情况下，以可再生能源供热(冷)，替代了部分化石能源消耗；以能的梯级利用为原则，使中、低温太阳能获得跨级利用，通过太阳能加热天然气，降低了天然气加热单元的能耗，提高了分布式能源系统的发电效率；本发明实现了可再生能源与化石能源的优势互补，具有节能与环保的双重效益。To sum up, the present invention adopts the energy supply method of coupling solar energy and natural gas, utilizes the characteristics of stable output of natural gas distributed energy, enables stable utilization of solar energy, and solves the shortcomings of poor sustainability of the single solar energy supply system and large heat storage system ;Compared with a separate natural gas distributed energy system, in the case of obtaining the same electricity and heat (cold) output, renewable energy for heating (cold) replaces part of fossil energy consumption; the principle of energy cascade utilization , so that medium and low-temperature solar energy can be utilized across levels, heating natural gas through solar energy, reducing the energy consumption of the natural gas heating unit, and improving the power generation efficiency of the distributed energy system; the invention realizes the complementary advantages of renewable energy and fossil energy, and has the advantages of Double benefits of energy saving and environmental protection.
附图说明：Description of drawings:
图1是本发明一种耦合太阳能的天然气分布式能源系统的结构框图。Fig. 1 is a structural block diagram of a natural gas distributed energy system coupled with solar energy according to the present invention.
图中：1、压气机；2、燃烧室；3、燃气透平；4、余热利用装置；5、太阳能集热系统；6、储热水箱；7、热水用户；8、蒸汽用户；9、第一级天然气加热器；10、第二级天然气加热器；11、发电机；101～106、第一阀门至第六阀门。In the figure: 1. Compressor; 2. Combustion chamber; 3. Gas turbine; 4. Waste heat utilization device; 5. Solar heat collection system; 6. Hot water storage tank; 7. Hot water user; 8. Steam user; 9. The first-stage natural gas heater; 10. The second-stage natural gas heater; 11. The generator; 101-106. The first valve to the sixth valve.
具体实施方式：Detailed ways:
下面将结合附图及实施例对本发明作详细的介绍：The present invention will be described in detail below in conjunction with accompanying drawing and embodiment:
如图1所示，本发明所述一种耦合太阳能的天然气分布式能源系统，包括：燃气轮机发电机组、余热利用装置4、太阳能集热系统5、储热水箱6、热水用户7、蒸汽用户8、第一级天然气加热器9、第二级天然气加热器10以及阀门101-106，燃气轮机发电机组包括顺次连接的压气机1、燃烧室2、燃气透平3和发电机11；其中，天然气经过第一级天然气加热器9和第二级天然气加热器10后进入燃烧室2；空气经过压气机1后进入燃烧室2，空气与天然气在燃烧室2内燃烧后进入燃气透平3；燃气透平3排气进入余热利用装置4，余热利用装置4的排气进入大气；太阳能集热系统5产生热水进入储热水箱6，储热水箱6与第一级天然气加热器9相连。所述热水用户7至少通过第四阀门104和第五阀门105与余热利用装置4相连；所述热水用户7至少通过第二阀门102和第三阀门103与储热水箱6相连；所述蒸汽用户8与余热利用装置4相连；所述第二级天然气加热器10至少通过第六阀门106与余热利用装置4相连。As shown in Figure 1, a natural gas distributed energy system coupled with solar energy according to the present invention includes: a gas turbine generator set, a waste heat utilization device 4, a solar heat collection system 5, a hot water storage tank 6, a hot water user 7, a steam User 8, first-stage natural gas heater 9, second-stage natural gas heater 10, and valves 101-106, and the gas turbine generator set includes a sequentially connected compressor 1, combustion chamber 2, gas turbine 3, and generator 11; The natural gas enters the combustion chamber 2 after passing through the first-stage natural gas heater 9 and the second-stage natural gas heater 10; the air enters the combustion chamber 2 after passing through the compressor 1, and the air and natural gas enter the gas turbine 3 after being combusted in the combustion chamber 2 The gas turbine 3 exhaust gas enters the waste heat utilization device 4, and the exhaust gas of the waste heat utilization device 4 enters the atmosphere; the hot water generated by the solar heat collection system 5 enters the heat storage tank 6, and the heat storage tank 6 and the first-stage natural gas heater 9 connected. The hot water user 7 is connected to the waste heat utilization device 4 at least through the fourth valve 104 and the fifth valve 105; the hot water user 7 is connected to the hot water storage tank 6 at least through the second valve 102 and the third valve 103; The steam user 8 is connected to the waste heat utilization device 4 ; the second-stage natural gas heater 10 is connected to the waste heat utilization device 4 at least through the sixth valve 106 .
所述余热利用装置4可以单独为余热锅炉或余热锅炉和汽轮机发电机组的组合。The waste heat utilization device 4 may be a waste heat boiler alone or a combination of a waste heat boiler and a steam turbine generator set.
所述第一级天然气加热器9以太阳能集热器产生的热水为热源，所述第二级天然气加热器10以余热利用装置所产生的热水为热源。天然气优先在所述第一级天然气加热器9中加热至额定温度，所述太阳能集热系统5产生的热水不足时，通过调节第六阀门106使天然气在第二级天然气加热器10内加热至额定温度。The first-stage natural gas heater 9 uses hot water generated by a solar collector as a heat source, and the second-stage natural gas heater 10 uses hot water generated by a waste heat utilization device as a heat source. The natural gas is preferentially heated to the rated temperature in the first-stage natural gas heater 9, and when the hot water produced by the solar heat collection system 5 is insufficient, the natural gas is heated in the second-stage natural gas heater 10 by adjusting the sixth valve 106 to rated temperature.
所述太阳能集热系统5采用真空管或平板型太阳能集热方式。The solar heat collection system 5 adopts a vacuum tube or flat plate solar heat collection method.
太阳能具有再生性好但持续性差的特点，天然气具有再生性差但持续性好的特点，本发明实现了可再生能源与化石能源的优势互补，提高了中、低温太阳能的应用能级，使太阳能得到稳定和高效利用，降低了天然气加热单元能耗，提高了天然气分布式能源系统的热效率，具有节能与环保的双重效益。Solar energy has the characteristics of good regeneration but poor sustainability, and natural gas has the characteristics of poor regeneration but good sustainability. The invention realizes the complementary advantages of renewable energy and fossil energy, improves the application energy level of medium and low temperature solar energy, and makes solar energy obtain Stable and efficient utilization reduces the energy consumption of the natural gas heating unit, improves the thermal efficiency of the natural gas distributed energy system, and has the dual benefits of energy saving and environmental protection.
本发明的工作过程如下：Working process of the present invention is as follows:
如图1所示，空气经过压气机1后形成高压空气进入燃烧室2，与天然气燃烧后产生高温高压烟气进入燃气透平3做功，燃气透平3带动发电机11发电。随后，烟气进入余热利用装置4进行余热利用，经降温后排入大气。As shown in Figure 1, the air passes through the compressor 1 to form high-pressure air and enters the combustion chamber 2. After being combusted with natural gas, high-temperature and high-pressure flue gas enters the gas turbine 3 to perform work. The gas turbine 3 drives the generator 11 to generate electricity. Subsequently, the flue gas enters the waste heat utilization device 4 for waste heat utilization, and is discharged into the atmosphere after being cooled.
水在余热利用装置4内吸收烟气余热，产生热水通过第四阀门104和第六阀门106分别供给热水用户7和第二级天然气加热器10，并且产生蒸汽供给蒸汽用户8；热水分别在热水用户7和第二级天然气加热器10内经换热冷却后，返回至余热利用装置4。The water absorbs the waste heat of the flue gas in the waste heat utilization device 4, generates hot water to supply the hot water user 7 and the second-stage natural gas heater 10 through the fourth valve 104 and the sixth valve 106, and generates steam to supply the steam user 8; hot water After heat exchange and cooling in the hot water user 7 and the second-stage natural gas heater 10 , return to the waste heat utilization device 4 .
水在太阳能集热系统5内吸收太阳热能，形成中低温热水进入储热水箱6，储热水箱6内热水达到一定温度后分为两路，一路通过第一阀门101向第一级天然气加热器9提供热源水，另一路通过第二阀门102向热水用户7提供热源水；热水在第一级天然气加热器9和热水用户7内经换热冷却后，返回至储热水箱6。Water absorbs solar heat energy in the solar heat collection system 5 to form medium and low temperature hot water and enters the hot water storage tank 6. After the hot water in the hot water storage tank 6 reaches a certain temperature, it is divided into two paths, and one path passes through the first valve 101 to the first The first-stage natural gas heater 9 provides heat source water, and the other way provides heat source water to the hot water user 7 through the second valve 102; the hot water returns to the heat storage after heat exchange and cooling in the first-stage natural gas heater 9 and the hot water user 7 water tank6.
天然气经过调压站和精过滤器后进入第一级天然气加热器9，在天然气加热器9内吸收太阳能集热系统5所产生中低温热水的热能，经加热后进入第二级天然气加热器10，在天然气加热器10内吸收余热利用装置4所产生的热水热能，被加热至额定温度后进入燃烧室2。The natural gas enters the first-stage natural gas heater 9 after passing through the pressure regulating station and fine filter, absorbs the heat energy of the medium and low-temperature hot water generated by the solar heat collection system 5 in the natural gas heater 9, and enters the second-stage natural gas heater after being heated 10. Absorb the hot water heat energy generated by the waste heat utilization device 4 in the natural gas heater 10, and enter the combustion chamber 2 after being heated to the rated temperature.
天然气加热的用热需求由两路热源保证，一路来自余热利用装置4，另一路来自储热水箱6，通过第一阀门101和第六阀门106的开度分别调节两路热源流量；运行原则为优先开启第一阀门101，以利用储热水箱6内的热源水，不足部分通过开启第六阀门106来满足。The heat demand for natural gas heating is guaranteed by two heat sources, one is from the waste heat utilization device 4, and the other is from the hot water storage tank 6, and the flows of the two heat sources are respectively adjusted by the opening degrees of the first valve 101 and the sixth valve 106; operating principles In order to preferentially open the first valve 101 to utilize the heat source water in the hot water storage tank 6 , the insufficient part is met by opening the sixth valve 106 .
热水用户7的用热需求由两路热源保证，一路来自余热利用装置4，另一路来自储热水箱6，通过第四阀门104和第二阀门102的开度分别调节两路热源流量；运行原则为优先开启第四阀门104，以利用余热利用装置4产生的热水，不足部分通过开启第二阀门102来满足。The heat demand of the hot water user 7 is guaranteed by two heat sources, one is from the waste heat utilization device 4 and the other is from the hot water storage tank 6, and the flow rates of the two heat sources are respectively adjusted by the opening degrees of the fourth valve 104 and the second valve 102; The operating principle is to preferentially open the fourth valve 104 to utilize the hot water generated by the waste heat utilization device 4 , and open the second valve 102 to meet the shortage.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511001532.8A CN105508158B (en) | 2015-12-28 | 2015-12-28 | Natural gas distributed energy system coupled with solar energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511001532.8A CN105508158B (en) | 2015-12-28 | 2015-12-28 | Natural gas distributed energy system coupled with solar energy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105508158A CN105508158A (en) | 2016-04-20 |
| CN105508158B true CN105508158B (en) | 2018-07-24 |
Family
ID=55716387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511001532.8A Active CN105508158B (en) | 2015-12-28 | 2015-12-28 | Natural gas distributed energy system coupled with solar energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105508158B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958414B (en) * | 2021-11-19 | 2024-11-12 | 西安热工研究院有限公司 | Fuel heating system and method for gas turbine combined cycle unit combined with solar energy |
| CN114837818A (en) * | 2022-04-18 | 2022-08-02 | 中国联合重型燃气轮机技术有限公司 | Gas turbine system and power generation system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825018A (en) * | 2008-12-22 | 2010-09-08 | 通用电气公司 | A system and method for heating a fuel using a solar heating system |
| CN102278205A (en) * | 2010-06-13 | 2011-12-14 | 中国科学院工程热物理研究所 | Combined cycle method capable of being used for distributed air and fuel humidified gas turbine |
| CN205243745U (en) * | 2015-12-28 | 2016-05-18 | 华能国际电力股份有限公司 | Natural gas distributed energy system coupled with solar energy |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5460816B1 (en) * | 2012-10-26 | 2014-04-02 | 川崎重工業株式会社 | Photovoltaic gas turbine power generation system with hydrogen generator |
-
2015
- 2015-12-28 CN CN201511001532.8A patent/CN105508158B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825018A (en) * | 2008-12-22 | 2010-09-08 | 通用电气公司 | A system and method for heating a fuel using a solar heating system |
| CN102278205A (en) * | 2010-06-13 | 2011-12-14 | 中国科学院工程热物理研究所 | Combined cycle method capable of being used for distributed air and fuel humidified gas turbine |
| CN205243745U (en) * | 2015-12-28 | 2016-05-18 | 华能国际电力股份有限公司 | Natural gas distributed energy system coupled with solar energy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105508158A (en) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112283068B (en) | A compressed air energy storage device | |
| CN104405599B (en) | Fuel gas-supercritical carbon dioxide united power electricity generation system utilizing solar energy | |
| CN201321918Y (en) | Heat power and cold cogeneration device for waste heat utilization of large-scale marine diesel engine | |
| CN111928219B (en) | A combined cooling, heating and power supply system for distributed gas complementary solar energy utilization | |
| CN109139157B (en) | Solar and geothermal energy coupled power generation system device based on organic Rankine cycle | |
| CN205825455U (en) | A kind of solar energy assisted coal fired unit hybrid power system run under multi-mode | |
| CN105258384B (en) | A kind of thermoelectric cold polygenerations systeme of integrated thermochemical process | |
| CN103727703A (en) | Recycling combined cooling heating and power system | |
| CN112611010B (en) | A kind of regulation method for flexible regulation system of power generation load of multi-heat source cogeneration unit | |
| CN105783330B (en) | A kind of distributed energy resource system of heat engine driving VM circulating heat pumps | |
| CN202215437U (en) | An integrated system of wind power generation and compressed air energy storage | |
| CN110645098A (en) | A regional integrated energy system containing carbon dioxide energy storage and its operation method | |
| CN101285420A (en) | Energy supply system and method integrating gas turbine cycle and heat pump | |
| CN108798898B (en) | System and method for supplying steam and hot water by combining proton exchange membrane fuel cell and gas turbine | |
| CN205243745U (en) | Natural gas distributed energy system coupled with solar energy | |
| CN103629724A (en) | System for greatly reducing district heating temperature by cogeneration | |
| CN101285627A (en) | A composite energy supply system and its latent heat utilization method | |
| CN216518291U (en) | Gas turbine inlet air cooling system based on photovoltaic, waste heat utilization and cold accumulation | |
| CN207348906U (en) | A kind of hydrogen of coupled solar-oxygen combustion association circulating power generation system | |
| CN113237134B (en) | Geothermal energy central heating system based on electric heat pump unit | |
| CN204806735U (en) | Distributed energy system of heat engine drive VM circulation heat pump | |
| CN105508158B (en) | Natural gas distributed energy system coupled with solar energy | |
| CN209877073U (en) | Heating device for comprehensive application of screw expander and heat pump | |
| CN104454409A (en) | Solar-assisted reheat overheating thermal power generation system and emission reduction dilatation method | |
| CN107842400A (en) | A kind of solar energy cooperates with Turbo-generator Set double reheat system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |