Calculators › Energy storage Required peak thermal storage calculator
Required peak thermal storage
Required storage discharge energy is calculated as (Load_tons − Operating_chiller_tons) × Duration. Use the stated system boundary and matching input units.
Units IP (US) SI (metric)
Storage = ( Load tons − Operating chiller tons ) × Duration \text{Storage} = \left(\text{Load}_{\text{tons}} - \text{Operating chiller tons}\right) \times \text{Duration} Storage = ( Load tons − Operating chiller tons ) × Duration Storage = ( Load kW − Operating chiller kW ) × Duration \text{Storage} = \left(\text{Load}_{\text{kW}} - \text{Operating chiller kW}\right) \times \text{Duration} Storage = ( Load kW − Operating chiller kW ) × Duration
Calculator
Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.
Worked example
Given
Load tons \text{Load}_{\text{tons}} Load tons 400 ton Operating chiller tons \text{Operating chiller tons} Operating chiller tons 250 ton Duration \text{Duration} Duration 4 h Storage = ( 400 − 250 ) × 4 = 600 \text{Storage} = \left(400 - 250\right) \times 4 = 600 Storage = ( 400 − 250 ) × 4 = 600
Given
Load kW \text{Load}_{\text{kW}} Load kW 400 kW cooling Operating chiller kW \text{Operating chiller kW} Operating chiller kW 250 kW cooling Duration \text{Duration} Duration 4 h Storage = ( 400 − 250 ) × 4 = 600 \text{Storage} = \left(400 - 250\right) \times 4 = 600 Storage = ( 400 − 250 ) × 4 = 600
Symbols and units
Symbol Meaning Unit
Storage \text{Storage} Storage required storage discharge energy ton-hour Load tons \text{Load}_{\text{tons}} Load tons constant cooling load during discharge ton Operating chiller tons \text{Operating chiller tons} Operating chiller tons concurrent operating chiller capacity ton Duration \text{Duration} Duration discharge period h
Symbol Meaning Unit
Storage \text{Storage} Storage required storage discharge energy kWh cooling Load kW \text{Load}_{\text{kW}} Load kW constant cooling load during discharge kW cooling Operating chiller kW \text{Operating chiller kW} Operating chiller kW concurrent operating chiller capacity kW cooling Duration \text{Duration} Duration discharge period h
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