energy storage

Question 1

Define energy mismatch

Answer 1

demand vs supply profiles

Question 2

What are the impacts of mismatch for energy storage

Answer 2

peak loads, higher cost, and inefficacies

Question 3

solar energy affected by ________ and ________. Wind energy is influenced by wind ______ and ________

Answer 3

clouds and humidity
speed and direction

Question 4

energy storage systems (ESS) help manage __________ renewable sources

Answer 4

intermittent

Question 5

Technologies of energy storage include

Answer 5

batteries, flywheels, thermal systems, and more

Question 6

ESS supports grid _______, reduce emissions, and enhance __________

Answer 6

stability
efficiency

Question 7

Define storage medium

Answer 7

stores energy in chemical, mechanical, or thermal form

Question 8

define power conversion system (PCS)

Answer 8

manages AC/DC energy conversion. This is critical for efficiency and ensuring smooth energy flow

Question 9

Define balance of plant (BOP)

Answer 9

infrastructure like HVAC, enclosures, and controls. BOP customization adapts systems for specific environments

Question 10

what are the components for energy storage

Answer 10

storage medium
power conversion system
balance of plant

Question 11

What are the key processes of energy storage systems

Answer 11

charging period, storing period, discharging period

Question 12

What are the advantages of energy storage systems

Answer 12

• Reduces energy consumption costs
• Improves the efficiencies of the system and system components
• Extends the period of use of energy source
• Decreases the capacity and size of the system’s equipment
• Reduces the initial investment and service costs
• Balances the energy supply and demand
• Provides resilient operation
• Helps increase the generation capacity
• Increases the flexibility of working conditions and hours
• Reduces the fossil-based energy consumption
• Reduces the carbon emission and environmental impacts

Question 13

What is exergy

Answer 13

the maximum amount of work that can be obtained from a system or energy source

Question 14

list the classifications of common energy storage methods

Answer 14

mechanical ES
Chemical ES
magnetic and electromagnetic ES
Thermal ES
Electrochemical ES
Biological ES

Question 15

Mechanical energy storage methods:
Energy stored via ________ and _________ energy. Achieved through linear or _________ velocities or by ___________ gases. Offers higher _______ compared to other methods, making it advantageous.

Answer 15

kinetic and potential
rotational
compressing
capacity

Question 16

What are the 3 classifications of mechanical energy storage methods

Answer 16

pumped-hydro energy storage
flywheels
compressed-air energy storage

Question 17

Flywheel:
Flywheel energy storage is a method of storing energy in the form of ______ energy in a spinning flywheel. They are more compact and have faster responses than _______, but less energy ________.

Answer 17

kinetic
batteries
dense

Question 18

Thermal energy storage methods: TES also called heat storage, involves ________ incoming energy into heat and storing it in a medium. TES is an advanced and mature method for storing energy with unlimited ___________ and ___________

Answer 18

converting
applications and capacities

Question 19

What are the primary categories for thermal energy storage

Answer 19

sensible heat storage
Latent heat storgae

Question 20

Describe sensible heat storage vs latent heat storage

Answer 20

sensible heat storage - heat stored in materials with temperature changes
latent heat storage - heat stored in materials undergoing phase change