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Similar to KE House Achieves 38% Solar Self-Sufficiency
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KE House Achieves 38% Solar Self-Sufficiency
- 1. KE House Solar Transformation Project Preamble and Highlights
- 2. KE’s Small Scale Solar/ RE Program: Energy Conservation Department (ECD) • KE’s in-house project manager for solar PV projects design and implementation: – 600 KW of small scale grid tied and off grid projects have been successfully completed. • These projects ensure facility’s compliance with: – Energy conservation and efficiency targets. – Best practices in energy management. • KE’s point of contact for both internal and external stakeholders and the lead department on proposed Net Metering rules. • The department supports and promotes state of the art technologies and solutions for KE’s consumers. • Besides technical consulting services and RE projects, ECD actively conducts awareness programs which include school campaigns and industrial energy efficiency seminars throughout Karachi.
- 3. KE House Load Details • Approximately 800 kW connected load at KE House. • Currently 38% of this load has been switched to in house solar PV generation. Lights 2% HVAC 59% UPS & Misc 26% Office Equipment 11% Elevator 2% KE HOUSE LOAD DISTRIBUTION • Two PV projects have been completed: 25 KW BOC project 267.5 KW Carport project
- 4. Potential for Solar in Karachi Plenty of Sun hours in Karachi • 320 days of 6 hours sunshine is taken as an approximate. • Panels in the duration have shown to perform to 85% of their rated capacity.
- 5. 25 KW Rooftop PV Project – Pilot Phase • In March 2015 management approved installation of 25 KW rooftop solar at KE House. • Top 5 vendors had submitted their proposals which were evaluated on techno-commercial basis. • On the basis of above selection, Orient Energy Systems were selected in April 2015. • In August 2015 First Solar (USA) offered free of cost panels. • After re-evaluation of the proposals, MAQ international and First Solar (USA) were awarded the contract in October 2015.
- 6. Project Overview – 25 KW BOC Rooftop PV • The project at BOC is equipped with 225 thin film (First Solar) solar panels and 3 SMA inverters. The PV system is grid tied and also served as the pilot project for testing of Net Metering. • The 25 KW project has been performing up to expectations and is capable of generating 43,500 KWh/year. System Capacity (KW) Total Annual Saving in Units (KWh) Total Annual Savings (PKR Million @ Rs. 22) Payback time (Years) Carbon Emissions Reduction (ton/year) 25 38,400 0.85 2.7 16,500 The payback of this system is less than 3 years. • The system also consists of a weather station and a data monitoring system that assists tracking the system’s performance.
- 7. Compliance to Network & Reliability Standards: 25 KW Pilot Net Metering Project • Bi-directional meter is installed at the BOC project. • Network behavior monitored through power logger & fault testing conducted: • Under all test conditions inverter desynchronized with utility source -Utility Shutdown -Phase to neutral entangle -Phase to phase entangle -Low voltage -Neutral break/ Voltage fluctuation -Phase missing -100 -50 0 50 100 150 200 250 16-Jul 17-Jul 18-Jul 19-Jul 20-Jul 21-Jul 22-Jul 23-Jul 24-Jul 25-Jul 26-Jul 27-Jul 28-Jul 29-Jul 30-Jul 31-Jul 1-Aug 2-Aug 3-Aug 4-Aug 5-Aug 6-Aug 7-Aug 8-Aug 9-Aug 10-Aug 11-Aug 12-Aug 13-Aug 14-Aug kWh 16- Jul 17- Jul 18- Jul 19- Jul 20- Jul 21- Jul 22- Jul 23- Jul 24- Jul 25- Jul 26- Jul 27- Jul 28- Jul 29- Jul 30- Jul 31- Jul 1- Au g 2- Au g 3- Au g 4- Au g 5- Au g 6- Au g 7- Au g 8- Au g 9- Au g 10- Au g 11- Au g 12- Au g 13- Au g 14- Au g Import 0.60.32111811741571370.50.417117517218816917 7.12011641221861325.56.1130132122991430.40.4 Export -24-86 -1 -1 -1 -1 -2 -62-82 -3 -3 -2 -2 -2 -63-54 -1 -1 -2 -1 -1 -21-36 -2 -1 -4 -6 -3 -74-70 Solar Production kWh 37 89 47 77 69 64 71 70 84 86 92 85 68 93 69 73 42 64 77 39 39 25 40 72 61 8510281 81 74 KE House Electricity Import & Export Desynchronization study conducted / fault tested
- 8. Power Quality Results: 25 KW Pilot Net Metering Project • According to IEE Std. 519-1992 Total Harmonic Distortion limit is 5 % for voltages below 69kV and above 120 V. • Our study ensures that the inverter complies with IEEE 1547 grid interconnection code • Other parameters including voltage range, frequency range and power factor are within acceptable limits as outlined in the interconnection code.
- 9. 267.5 KW Solar Carport Project – Phase II • March 2016, approval for the 267.5 KW solar carport project • Orient Energy Systems and MAQ International shortlisted. MAQ backed off. • Orient Energy Systems given go ahead in May 2016: – Approval from CFT comprising of Business Finance, Procurement and ECD.
- 10. Project Overview: 267.5 KW Carport Project System Capacity (KW) Total Annual Saving in Units (KWh) Total Annual Savings (PKR Million @ Rs. 22) Payback time (Years) Emissions Reduction (ton/year) 267.5 304,749 6.7 4.6 131,651 • Equipped with 1070 poly crystalline ReneSola PV panels and 12 SMA inverters, the project is expected to generate more than 300,000 KWh/year translating to more than 6 million PKR annual saving. • Its key features include: – Aesthetic mechanical structure – Tier-1 PV panels, inverters and cluster controllers Equipment Description Solar Panels ReneSola 156 Polycrystalline – 250 W Inverter SMA Sunny Tripower 25000TL Data logger SMA Sunny Cluster Online Monitoring System SMA Civil Structure Hot Dip Galvanized Iron
- 12. Key Results Achieved • With both phases (rooftop + carport) coming online: – KE saves ~ 7.5 million PKR annually in electricity costs. – KE mitigates ~ 150,000 tons of CO2 emissions annually. • KE house is now 38% self sufficient in its electricity usage during office hours. • These milestone energy management projects bring us closer to KE’s sustainable energy consumption goals fulfilling the ISO 50001 targets.