Thermal energy storage systems

Question 1

Reduce peak kW costs, capacity costs, and time of day energy costs are all reasons to consider __ __ __.

Answer 1

Reasons to consider thermal energy storage

Question 2

Shifting air condition to off-peak times helps in three main ways

Utilizing Off peak AC systems with thermal energy storage operate typically at __ (stores energy)
* Chilled water or ice is used for storage medium

conventional air conditions with thermal energy will __ or __ cooling loads

Daytime peak elecrical load is ___ or eliminated

Answer 2

night, meet or exceed, reduced

Question 3

__ __ the chiller will offer a partial shift of the load on the chiller to off-peak hours of the day. chiller runs at constant load 24 hours a day
good for new construction

Answer 3

load leveling

Question 4

= total ton*hours

hours available to operate chillers

Answer 4

load leveling the chiller

Question 5

__ __ the chiller is a complete shift of the load on the chiller to off-peak hours. chiller system must be sized to meet peak cooling load in ton*hour

Answer 5

Load Shifting

Question 6

Ice storage is more complex tanks but only requires ___ % the space needed for chilled water tanks

solid ice requires around __ of the space needed for chilled water tanks

Answer 6

20-30%

10%

Question 7

Chilled water systems are operated in a matter to use only sensible heat storage and store __ Btu per pound of water for each Degree of temperature difference between the stored and returned water

Answer 7

One

Question 8

Ice systems are typically operated in a manner to use only latent heat associated with freezing and melting and one pound of ice at 32 Degrees absorbs ___ Btu to become 32 degree water

Answer 8

144