Solar Heat

LCoE 0.031 $ per kWh

CSP Electric plants

CSP technology of electric power plants can be divided into two groups according to the way in which solar energy is concentrated, ie. whether it is a line or point focus.

Linear systems for concentrating the sun's rays mainly comprise linear parabolas and linear Fresnel concentrators. The characteristic of linear systems is that the process of guiding, ie. tracking the position of the Sun, is done by the device’s rotating around one axis.

Point focus systems can reach much higher temperatures than the linear systems due to higher concentration factor. In order to maintain a high concentration factor, point focus systems follow the position of the Sun by rotating around two axes. Point focus systems include: solar tower, Fresnel ring concentrator, solar dish, beam down tower, fixed focus Fresnel concentrator, solar furnace, Schefflerdish, etc.

With the exception of the technology of solar dish Stirling engine, what is common for all CSP technologies of electric power plants is that electrical energy is produced by means of water steam and a steam turbine. The efficiency of the cycle with the steam turbine with CSP electric plants largely depends on the quality of the produced steam, ie. the higher the temperature, the higher the efficiency (Carnot).

Depending on technical and economic analysis StorE will offer the most optimal solution for a CSP electric plant that will meet your goals.

CSP Industrial plants

CSP industrial plants can be divided into two groups depending on the temperature of application: low-temperature systems (40°C to 80°C) and medium-temperature systems (100°C to 250°C). Low-temperature systems include conventional solar collectors: panel and vacuum, while the medium-temperature systems include focusing devices with low level of concentration.

Based on the large number of studies on needs for heat in the industrial sector, there were identified several branches that have very favorable conditions for the implementation of solar energy.

Industries that consume a lot of heat are the food industry and production of non-metallic minerals.

Typical representatives of the food industry that can exploit the potential of solar energy in large measure are: the dairy industry, processed meat industry and breweries. Because of very high energy consumption and continuous process in food processing, the food industry meets all the necessary prerequisites for the implementation of CSP industrial plants..

StorE CSP industrial plants allow you considerable savings in the consumption of primary energy fuel, as well as quick repayment period of the installed system.

Thermal battery

The growing need for energy leads to optimization of systems and processes that are less energy efficient. This optimization includes the usage of thermal batteries or storages in order to accumulate energy from renewable sources, primarily the Sun and wind, as well as to accumulate waste heat from industrial processes.

The system of accumulation of thermal energy in an industry depends on the very nature of the process. For heating the water in a process, thermal accumulation in the form of sensible heat of water definitely makes sense. If you need to heat the air, accumulation in the form of the the pebble bed can be an appropriate solution, as well as some of the regenerative air heaters with solid matter as storage mass.

The main characteristics of thermal batteries are:

  • Temperature work mode.
  • The heat capacity per unit volume.
  • Type of working fluid to add and extract heat.
  • Construction costs.

StorE thermal batteries are designed and engineered to always provide optimal balanced ratio of the foregoing.

FAQ

Find answers to all your questions about our products, services, integrations, and other frequently asked questions.

How do Storenergy CSP plants produce electricity from the sun?

All CSP technologies work on the same thermodynamic principles. Heat from the sun is concentrated on to the receiver where heat transfer fluid collects the heat and transfers it to the thermal storage and heat engine. Heat engine is usually the steam turbine or ORC turbine which transforms the heat from the sun into usable work (electricity). By adding thermal storage Storenergy CSP can produce electricity even at night.

Land requirements are dependent on the solar resource available on the location and amount of thermal storage designed into the plant. In general terms this is 25.000 sqm per MW.

Storenergy solar concentrators are designed to be stand alone units that can operate independently so they can be used in industry for heat generation in a form of steam and hot air. Modular design of solar concentrators enables thermal power output from 70 kW to 1000 kW which is most often case in industry.

In industrial application Storenergy CSP systems are designed to make savings by reducing the consumption of fossil fuel. Usually it is designed to replace 50% of fossil fuel boiler capacity. If conditions on location are favorable, then even higher percentage of fossil fuel can be considered.

Storenergy CSP systems can be integrated with absorption cooling devices and thus provide the cooling load. By integrating thermal storage, operation of the absorption device can run more smoothly.

By using non-imaging concentrator with Fresnel design of mirrors in a circular form we can achieve desired concentration ratio. For power production we use concentrator with highest ratio and for heat for industry we accommodate design of mirrors and thus concentration ratio, to satisfy the needs of the user.

Storenergy CSP plant for electricity production uses air as a heat transfer fluid. We have decided to use air because of several reasons: free of charge and available on every location, can be heated up to very high temperatures (800 deg C), no need for periodic replacement, very compatible with Storenergy thermal storage.

Storenergy thermal storage is made of refractory so that it can withstand high temperatures > 800 deg C. Heat is stored as a sensible heat inside the storage. Storenergy thermal storage is pressure-less, non-corrosive, non-explosive, non-toxic, with simple regulation, long lifetime and 100% recyclable.

Storenergy CSP systems for heat for industry have expected lifetime of 20 – 25 years. Storenergy CSP systems for electricity production are designed to operate for 35 years.

We in Storenergy team have decided to have a robust and simple system that has: higher operating temperatures than other technologies, less components, simple and low-cost thermal storage, non-corrosive fluids and modular design of concentrators.