chilled water<\/a> flow.<\/p>\nYou can also use the chiller TR calculation formula, Tons = BTU\/hr \/ 12,000, <\/b><\/strong>to convert to Tons of Refrigeration (TR).<\/p>\n<\/span>Apply Safety Factor<\/span><\/h4>\nWhen you complete the above calculation, we always recommend that you oversize the result by 20% to handle peak loads or future expansion.<\/p>\n
<\/span>Calculation Example<\/span><\/h4>\nHere is an example for you to have a better understanding.<\/p>\n
If your chiller has a flow rate of 100 GPM and a temperature drop of 10\u00b0F, then you can calculate as follows:<\/p>\n
\n- Calculate BTU\/hr: 100\u00d7500\u00d710=500,000 BTU\/hr<\/li>\n
- Convert to Tons: 500,000 \/ 12,000=41.67 Tons<\/li>\n
- Apply Safety Factor: 41.67\u00d71.2=50Tons<\/li>\n<\/ol>\n
<\/span>Using kW per Calculation Method<\/span><\/h3>\nIKW (Input Kilowatts per Ton of Refrigeration) is a unit used to measure the specific power consumption of a refrigeration machine. It is expressed as the electrical energy consumption in kilowatts (kW), which is used to generate one ton of cooling capacity (1 TR) of cooling capability.<\/p>\n
Unlike COP or EER, the smaller the value of the IKW, the more energy-efficient your system is.<\/p>\n
<\/span>The Formula of IKW<\/i><\/em><\/span><\/h6>\n\n- <\/b>IKW = Total Input Power (KW) \/ Cooling Capacity (TR)<\/b><\/strong><\/li>\n<\/ul>\n
Example: If a chiller consumes 300 kW of electricity to produce 100 TR of cooling, its IKW is 3.0 (300\/100=3.0).<\/p>\n
<\/span>Convert COP to EER<\/span><\/h3>\nBoth COP and EER can be used to measure efficiency. You can convert between them according to your preference.<\/p>\n
Their relationship:<\/p>\n
\n- <\/b>COP \u2248 EER \u00d7 0.293<\/b><\/strong><\/li>\n
- <\/b>EER \u2248 COP \u00d7 3.412<\/b><\/strong><\/li>\n<\/ul>\n\n
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Chiller Efficiency Tool<\/div>\n
Chiller Efficiency Calculator<\/div>\n
Use this calculator to estimate COP, EER, cooling capacity, IPLV\/NPLV, and kW\/ton from common chiller operating data.<\/p>\n<\/p><\/div>\n
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COP \/ EER<\/span>
\n Cooling Capacity<\/span>
\n kW \/ Ton<\/span>
\n IPLV \/ NPLV<\/span>
\n COP \u21c4 EER<\/span>\n <\/div>\n\n
Calculate COP and EER from cooling output and input power.<\/p>\n