A novel compressed air energy storage (CAES) system combined with pre-cooler and using low grade waste heat as heat source

Energy ◽  
2017 ◽  
Vol 131 ◽  
pp. 259-266 ◽  
Author(s):  
Long-Xiang Chen ◽  
Peng Hu ◽  
Chun-Chen Sheng ◽  
Mei-Na Xie
Keyword(s):  
Energy Storage ◽  
Heat Source ◽  
Waste Heat ◽  
Compressed Air ◽  
Low Grade ◽  
Compressed Air Energy Storage

scholarly journals Acid Corrosion in a CAES Recuperator

1986 ◽  
Author(s):  
Holger Lukas ◽  
Bhupen Mehta
Keyword(s):  
Sulfuric Acid ◽  
Energy Storage ◽  
Waste Heat ◽  
Acid Corrosion ◽  
Operating Conditions ◽  
Compressed Air ◽  
Compressed Air Energy Storage ◽  
Deposit Formation ◽  
Practical Solution ◽  
Operating Temperatures

Cold end corrosion and deposit formation due to sulfuric acid is a phenomenon not uncommon in boilers and waste heat boilers. Normally, the operating conditions can be changed to reduce or eliminate the corrosion and deposition problem. In a Compressed Air Energy Storage (CAES) recuperator, changing the operating conditions is not a practical solution. This paper presents the results of three different test periods using various materials at different operating temperatures.

Thermodynamic Analysis of an Advanced Solar-Assisted Compressed Air Energy Storage System

2016 ◽  
Author(s):  
Kent Udell ◽  
Michael Beeman
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
High Efficiency ◽  
Waste Heat ◽  
Storage System ◽  
Energy Storage System ◽  
Compressed Air ◽  
Compressed Air Energy Storage ◽  
Solar Thermal Energy

The performance of CAES is evaluated for various configurations, with and without thermal energy storage. First, a conventional compressed air energy storage process is modeled using a time series iterative forward differencing method to simulate the round trip efficiency, exergy storage, cavern temperatures and pressures, and the gas expander exit temperature of a CAES plant. The computational model was validated experimentally by comparing trended data of the compression cycle of a 280 HP Gardener-Denver tandem horizontal two-stage compressor to computational results. It was found that the process of cooling the compressors resulted in a large exergy loss and the inefficiencies of the expanders lead to higher temperature gas being exhausted back to ambient pressures. Second, Advanced Adiabatic Compressed Air Energy Storage (AACAES) was simulated to study the effectiveness of storing the thermal energy removed from the compressors to be added to the compressed air as it enters the expanders at a later time. Third, the concept of increasing the capacity of the thermal energy storage systems to allow recharge with concentrated solar heat was explored. It was found that the thermal efficiency of converting the solar thermal energy to power would be high (> 60%). Further, the expander exhaust temperature and exergy are high (> 500 K), implying that additional waste heat energy recovery will be possible. Taken together, the results of this study show that an integrated, high efficiency, on-demand, water-free, solar energy delivery system is possible if combined with an AACAES system.

scholarly journals Compressed air energy storage facility with water tank for thermal recovery

2020 ◽  
Vol 180 ◽  
pp. 02002
Author(s):  
Iulian Vlăducă ◽  
Claudia Borzea ◽  
Dan Ionescu ◽  
Alexandra Ţăranu ◽  
Răzvan Ciobanu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electric Power ◽  
Waste Heat ◽  
Thermal Recovery ◽  
Compressed Air ◽  
Small Scale ◽  
Air Cooling ◽  
Water Tank ◽  
Compressed Air Energy Storage ◽  
Twin Screw

The paper presents the prototype of the first Romanian Compressed Air Energy Storage (CAES) installation. The relatively small scale facility consists of a twin-screw compressor, driven by a 110 kW threephase asynchronous motor, which supplies pressurized air into a 50m3 reservoir, of 20 bar maximum pressure. The air from the vessel is released into a twin-screw expander, whose shaft spins a 132 kW electric generator. The demonstrative model makes use of a 5m3 water tank acting as heat transfer unit, for minimising losses and increasing efficiency and the electric power generated. Air compression and decompression induce energy losses, resulting in a low efficiency, mainly caused by air heating during compression, waste heat being released into the atmosphere. A similar problem is air cooling during decompression, lowering the electric power generated. Thus, using a thermal storage unit plays an essential role in the proper functioning of the facility and in generating maximum electric power. Supervisory control and data acquisition is performed from the automation cabinets. During commissioning tests, a constant stable power of around 50 kW with an 80 kW peak was recorded.

Novel Compressed Air Energy Storage (CAES) Systems Applying Air Expanders

1995 ◽  
Author(s):  
Isaac Shnaid ◽  
Dan Weiner ◽  
Shimshon Brokman
Keyword(s):  
Energy Storage ◽  
Gas Turbine ◽  
Waste Heat ◽  
Peak Load ◽  
Electric Energy ◽  
Compressed Air ◽  
Heat Sources ◽  
Compressed Air Energy Storage ◽  
Economic Analyses ◽  
Air Compressors

In Compressed Air Energy Storage (CAES) systems, off-peak electric energy is consumed by air compressors that charge CAES reservoirs. During peak load hours, air released from the CAES reservoir expands, producing electric power. Two novel CAES systems, improving their reliability and efficiency, are introduced. The first system is the CAES Plant Integrated with a Gas Turbine (CAESIGT), in which 40 percent of the power output is produced by a standard gas turbine, and 60 percent by an air expander utilizing compressed air that is preheated by the exhaust gases of the gas turbine. For certain initial parameters of the compressed air, its temperature after expansion becomes lower than the ambient temperature. This cold air can be used as a source for refrigeration of the gas turbine inlet air and for other purposes. In the CAES system of the second type, multistage expansion of compressed air is applied. Reheating air between expander stages is provided either by refrigerated substances, by heat sources from surroundings, or by non fuel heat sources such as the waste heat from industry, solar ponds, etc. Thermodynamic and economic analyses of the novel CAES systems are carried out.

scholarly journals Corrosion of Materials in a Simulated CAES Exhaust Gas Environment

1985 ◽  
Author(s):  
Holger Lukas
Keyword(s):  
Sulfuric Acid ◽  
Energy Storage ◽  
Waste Heat ◽  
Corrosion Testing ◽  
Operating Conditions ◽  
Compressed Air ◽  
Exhaust Gas ◽  
Compressed Air Energy Storage ◽  
Practical Solution ◽  
Preliminary Results

Cold end corrosion due to sulfuric acid is a phenomenum not uncommon in boilers and exhaust gas waste heat boilers. Normally, the operating conditions can be changed to reduce or eliminate the corrosion. In a Compressed Air Energy Storage (CAES) plant, this is not a practical solution. This paper presents the preliminary results of corrosion testing of various materials in a simulated CAES recuperator environment.

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