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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Battery Performance The steps to finding battery life and the results for the examples listed below. Step Example 1 Example 2 Example 3 Step 1: Find the appropriate Expected Cycle Life Chart for the system using Figure 2. C30 HP, 13Ahr C30 HP, 13Ahr - Step 2: Find the number of operating hours using transient size and transient interval. 17520 operating hours. 17520 operating hours 43800 non-operating hours (5 years) Step 3: Find the operating temperature of the battery using Figure 3. Temperature increase of 10° C, operating temperature = 22 + 10 = 32°C Temperature increase of 10°C from Figure 3, operating temperature = 29 +10=39°C Temperature = 35°C Step 4: Find the Temperature derating for the battery using Figure 5. Derating of 0.65 Derating of 0.36 Derating of 0.50 Step 5: Find the Number of Derating of 0.98 Starts derating using Figure 6. Step 6: Find the End of life Derating of 1.6 derating factor using Figure 7. Derating of 0.98 Derating of 1.6 - Derating of 1.1 Step 7: Calculate the lifetime of the battery. Expected Cycle Life: 17520 hours Temperature derating: 0.65 Starts Derating: 0.98 End of Life Derating: 1.6 Expected Life = 17520 * 0.65 * 0.98 * 1.6 = 17856 hours. Expected Cycle Life: 17520 hours Temperature derating: 0.65 Starts Derating: 0.98 End of Life Derating: 1.6 Expected Life = 17520 * 0.36*0.98*1.6=9889 hours. Multiply 5 years by both factors: 5years*0.50*1.1= 2.75 years 410044-001 Rev. A (October 2003) Page 6 of 16 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | Technical Reference Battery Performance
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