1. Photothermal power generation

Solar thermal power generation is a power generation system that uses large-scale array parabolic or dish mirror to reflect sunlight to obtain high-temperature working fluid, which directly or indirectly passes through the thermal cycle. In the United States, Spain and other countries, as well as the Middle East, South Africa, North Africa and other regions, photothermal power generation has a certain scale, and a number of large-scale photothermal power stations have been built or are being built. Solar thermal power generation is becoming a worldwide investment hotspot in the field of renewable energy.

2. Photothermal seawater

Many large-scale seawater desalination stations have been built in the Middle East and North Africa countries to meet the local demand for fresh water, but these seawater desalination stations need to consume a lot of energy, and the use of fossil energy is not only expensive but also pollutes the environment. Solar thermal power generation technology can replace fossil energy and seawater desalination technology effectively combined, such as the use of solar thermal power generation technology to generate steam required by low-temperature multi-effect distillation systems, the steam enters the cryogenic multi-effect distillation system as motive steam to produce fresh water.

3. Photothermal oil recovery

Heavy oil (heavy oil) is a kind of oil, generally refers to the viscosity is greater than 50 mPa · s, or in the oil layer temperature degassed crude oil viscosity is 1000~10000 mPa · s of high viscosity heavy crude oil. Due to the characteristics of high viscosity and high freezing point, heavy oil has not been the focus of oil exploitation for a long time in the past. With the increasing depletion of oil resources, the development of heavy oil has become the focus of future oil exploitation.

Solar concentrating technology can play a great role in heavy oil thermal recovery. The solar concentrator can concentrate the scattered sunlight to one place, and use the concentrated sunlight to heat the water to obtain the hot water or steam required for the thermal recovery of heavy oil.

4. Photothermal Chemical Industry

Chemical industry is closely related to people's daily life, chemical production processes such as water to hydrogen, coal to oil, natural gas reforming, etc., related reactions need to be carried out under high temperature conditions, all need to heat the production of raw materials. Solar concentrating technology can concentrate the scattered sunlight in one place, and use the concentrated sunlight to heat the raw materials in the chemical production process. In the solar reforming gas cycle, solar energy is used as a high-temperature heat source to provide the heat required for methane reforming, and the solar energy can be converted into chemical energy to improve the efficiency of the system with higher quality.

5. Medium temperature heat utilization

In general, the heating temperature between 80 ℃ and 320 ℃ solar thermal utilization is called solar thermal utilization. Solar energy can be widely used in heating, air conditioning, textile, printing and dyeing, papermaking, rubber, seawater desalination and other areas of production and life that require hot oil and hot steam. Taking the textile industry as an example, in the production process of rinsing, treating and drying, it is necessary to use water or steam at a temperature between 80 ℃ and 140 ℃. If the traditional heating method is used, a large amount of coal or natural gas or oil needs to be burned to produce hot water or steam at the required temperature. This requires the consumption of large amounts of non-renewable energy. Compared with traditional energy sources, solar concentrators have the advantages of green, environmental protection and no pollution, and can be used in industrial production that requires hot oil or hot steam.

 

Photothermal power generation:

(1) Tower solar power generation

Principle:

The tower-type solar thermal power generation system uses a central heat collection tower as the bearing foundation of the heat absorber. A certain number of heliostats are arranged around the heat collection tower. The heliostats reflect sunlight to the heat absorber on the top of the heat collection tower to heat the heat transfer fluid to 500-1000 ℃. The high-temperature heat transfer fluid generates high-temperature and high-pressure steam through the steam generation system to drive the steam turbine generator set to generate electricity. Shouhang Energy Saving has the design, procurement, construction and operation capabilities of large-scale tower-type photothermal power stations, and can provide users with complete sets of tower-type solar island and air-cooled island equipment, as well as system integration and EPC general contracting services for tower-type photothermal power stations.

 

 

Project Case:

First voyage energy-saving Dunhuang 10MW molten salt tower solar thermal power generation project

　　

 

Relying on solid research and development results, Shouhang invested in the construction of 10MW molten salt tower solar thermal power station. The project was successfully connected to the grid at the end of December 2016, and all indicators reached the design value. It has accumulated a lot of experience in design, manufacturing, construction, commissioning and operation. It has become the third project in the world and the first in Asia to achieve 24-hour continuous power generation. Inject strong impetus into the development of the photothermal industry!

 

Project Features:

　　

	Covers an area of 120 hectares
	More than 5000 hours of annual power generation
	The mirror area is 176,137 square meters.
	Number of heliostats 1525 surfaces
	Tower height 138 meters
	Heat storage time 15 hours

 

First voyage energy saving Dunhuang 100MW molten salt tower solar thermal power generation project

In 2016, the first voyage energy-saving Dunhuang 100MW molten salt tower solar thermal power generation project was selected as the first batch of national solar thermal power generation demonstration projects. The power station is independently designed, invested and constructed by Shouhang, which has 100% independent intellectual property rights. At the end of December 2018, it was connected to the grid for power generation, becoming China's first 100 trillion-level national solar thermal power demonstration power station, and it is also the world's highest molten salt tower solar thermal power station with the largest concentrating area.

 

Construction process:

2017.6.15 Main powerhouse foundation concrete pouring

2017.11.4 Heat absorption tower top

2018.10.5 Turbine Buckle Cylinder

2018.12.5 Heat absorption tower for the first time

2018.12.19 Thermal system blowpipe completion

2018.12.28 Grid-connected power generation

2019.6.17 Power generation at full load

 

Project Features:

	Covers an area of 800 hectares
	Annual power generation 0.39 billion degrees
	The mirror field covers an area of more than 140 million square meters.
	Number of heliostats 10000 multi-faceted
	Tower height 260 meters
	Heat storage time 11 hours

 

350000 tons of carbon dioxide, 10500 tons of sulfur dioxide and 5000 tons of nitrogen oxides,

Carbon dust emission reduction 100000 tons, steel consumption 45000 tons, standard coal saving 130000 tons,

Glass consumption of more than 100 million square meters, the consumption of power equipment: steam turbines, generators, air cooling island, auxiliary equipment

l Yumen First Flight Energy-saving New Energy 100MW Photothermal Power Generation Demonstration Project

l Dahua Shangyi 50MW Tower Solar Thermal Power Generation Project

　　……

 

trough solar power generation

Principle:

The trough solar thermal power generation system uses the trough parabolic concentrator to focus the sunlight on the collector tube located at the focal line, and heats the heat transfer fluid (such as heat transfer oil) that keeps flowing in the collector tube to about 400 ℃. The high temperature heat transfer fluid generates high temperature and high pressure steam through the steam generation system to drive the steam turbine generator set to generate electricity. Shouhang Energy Saving has the design, procurement, construction and operation capabilities of large-scale trough solar thermal power stations, and can provide users with complete sets of trough solar island and air-cooled island equipment, as well as trough power station system integration and EPC general contracting services.

　　

 

Project Case:

CGNPC Delingha 50MW Trough Power Generation Project

The project is the first commercial 50MW trough power generation project in China, which was connected to the grid on June 30, 2018.

　　

Project Overview
Owner	Zhongguang Nuclear Solar Energy Development Co., Ltd.	Loan Support	Asian Development Bank
Sun Island	maiden voyage photothermal	Location	Delingha
Elevation	3050~3200m	Annual DNI	2157kWh/m2
Number of loops	190	Turbine Capacity	55MW
heat storage capacity	1300MWht	light field heat collection area	621300m2

　　

Yumen Longteng Xinneng East Town Heat Transfer Oil Tank 50MW Photothermal Power Generation Demonstration Project

This project is one of the first national solar thermal power generation demonstration projects, using parabolic trough heat collection technology, the project proposed to build 200 sets of heat collection circuit, equipped with 10-hour heat storage device. The Yumen Longteng Photothermal Power Generation Project relies on the advantages of local abundant solar energy resources, which is of great significance in saving energy, adjusting the resource structure and improving the environment. In June 2018, Shouhang Energy Conservation signed a contract to contract this project.