Case Study: Holiday Inn Darling Harbour

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1 Cold solar feed Array Heat Pump Array Solar Collector Array Existing Cooling Load Solar Return Case Study: Holiday Inn Darling Harbour Project Project Description Project Statistics 30 x 500L Storage T-T500AS 30 x 7.2kW Heat Pump T-HP72AB Heat Pump 100 x Solar Collectors T-U1258AB Solar Collector 2.8 Years 673 MWh 38% Tivok Energy replaced an ageing gas system at it s end of life with a hybrid solar thermal system and saved the client $140,000 in CAPEX expenditure, with an annual saving of $69,000. By installing the Tivok system outdoors, Holiday Inn was able to lease out it s indoor plant room space for additional revenue. Solar collectors supply an annual average of 27% of the total hot water demand. Number of rooms 367 Occupancy rate 99% 16 x Gas Storage Gas tariff $20/GJ $12/kWh 30kL/day Client Total Per Room Project Value $240, $ STC Rebate $40, $ Annual Tariff Savings $71, $ Annual $4, $0.00 HOLIDAY INN DH Pre-upgrade Post-upgrade (Gas) (Solar Thermal) Hot water use (L/room/day) Energy use (MJ/room/day) Energy cost ($/room/day $0.60 $0.07 Savings ($/room/day) N/A $0.53 CAPEX 2000kWh 1800kWh 1600kWh 1400kWh 10 Hours 9 Hours 8 Hours 7 Hours Potable water feed Potable water return Saved on CAPEX 27% energy from collectors 1200kWh 1000kWh 800kWh 600kWh 400kWh 6 Hours 5 Hours 4 Hours 3 Hours 2 Hours Daily Heat Pump Energy Daily Collect Heat Pump Runtime Hours 200kWh 1 Hours COOLING Met IHG Revenue from leasing plant room Save $193/room Energy by 74% 0kWh Jan Feb Mar Apr May Jun Combined Monthly Average Jul 0 Hours

2 Case Study: Ibis Budget Hotel Wentworthville Project Project Description Project Statistics 10 x 500L Storage T-T500AS 10 x 7.2kW Heat Pump T-HP72AB Heat Pump 18 x Solar Collectors T-U1258AB Solar Collector 4.8 Years 213 MWh 20% Number of rooms 107 Occupancy rate 90% 2 x Gas Storage Gas tariff $25/GJ Tivok Energy s hybrid solar thermal system was installed to supply hot water to $17/kWh 9.5kL/day the 107 room hotel in Sydney s West. It was set up so that there were the options to use the system to pre-heat water for the existing gas boilers, or to supply the load as a stand alone system, with the incumbent gas system as back-up Client Total Per Room Project Value $86, $ STC Rebate $15, $ Annual Tariff Savings $17, $ $250, $200, $150, $100, Cumulative Cashflow Annual $1, $0.00 $50, $ $50, $100, Year Thermal System Contribution 16,000 Extended Asset Life 22% energy from collectors h 14,000 12,000 10,000 8,000 6,000 4,000 Met Accor Low risk, gas boost for peak demand Save $140/room Energy by 89% 2,000 - JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Solar Collector Energy Output (kwh) Heat Pump Energy Output (kwh)

3 Case Study: Rauxel Cosmetics Project Project Description Project Statistics 4 x 500L Storage T-T500AS 2 x 20kW Heat Pump T-HP200AB Heat Pump 12 x Solar Collectors T-U1258AB Solar Collector 3.5 Years 38 MWh 27% Batches/day 2 Liters/batch 800 Required temp. 70 o C Max allowable temp. drop 3 o C Rauxel Cosmetics requires hot water to heat up batches of cosmetics solutions. $0.28/kWh 1.6kL/day Previously it s water was being heated to 70 o C by an electric boiler before being circulated through a water jacket during the batch process. A Tivok hybrid system was designed as an addition to this system to pre-heat water for the batch process to 60 o C, resulting in more efficient hot water delivery overall. Potable Hot Out Process Feed Solar Feed Client Total Per Batch Project Value $41, $86.25 Annual Tariff Savings $11, $24.38 Annual $1, $0.00 Cumulative Cashflow Analysis $140, $120, $100, $80, $60, $40, $20, $- -$20, $40, $60, Solar Return 1 0 kl FEED TANK Potable water feed 5HP Heat Pump 5HP Heat Pump Extended Asset Life 59% energy from collectors kwh 3,500 3,000 2,500 2,000 1,500 Thermal System Contribution 1, Met Low risk, electrical boost Save $24/batch Energy by 89% - Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Heat Pump Energy Output (kwh) Solar Collector Energy Output (kwh)

4 Case Study: Crows Nest Community Center - North Sydney Council Project Project Description Project Statistics 2 x 420L Storage T-T420AB 4 x 7.2kW Heat Pump T-HP72AB Heat Pump 2.7 Years 32MWh 34% Tivok Energy installed 2 x T-HP72-2-T420A hot water systems to replace the ageing and non functioning gas and electric hybrid hot water system at Crows Nest Community Centre. The system was installed in 3 days and supplies hot water to a meals on wheels kitchen and the whole office building. HW Load Kitchen + 3 storeys office block Occupancy rate 90% 2 x Gas Storage + Local Zip Heaters Gas tariff $25/GJ $10/kWh 2.5kL/day Client Total Project Value $16, STC Rebate $2, Annual Tariff Savings $2, Annual $1, Extended Asset Life STC Rebate Eligible Met NSC Low risk, Electric boost for peak demand Save $2748 Energy by 78%

5 Case Study: Mercantile Backpacker Hotel Project Project Description Project Statistics 1 x 420L Storage T-T420AB 1 x 7.2kW Heat Pump T-HP72AB Heat Pump 3.2 Years 17MWh 20% HW Load Shower block - 8 showers Occupancy rate 90% 2x Dux proflow 4.8kW Electric boilers Tivok Energy installed 1 x T-HP72T420A hot water systems to replace the ageing $0.13/kWh 1.4 kl/day and non functioning electric HWS. The cost of the system was equivalent to a replacement electric boiler, but saves the hotel an estimated $2164. The system supplied hot water to the backpacker shower block on site. Client Total $15, Project Value $9, STC Rebate $ Annual Tariff Savings $2, PV of Cumulative Cash Flows ($) $10, $5, $1- -$5, $10, $15, Year Heat Pump vs Energy Consumption 2, Avoided CAPEX Improved Carbon Footprint Low risk, Electric boost for peak demand Save $2164 STC Rebate Eligible Energy by 71% Energy Consumption (kwh) 2, , , Jan FebM ar Apr MayJ un Jul Aug Sep Oct NovD ec Month

6 Tivok Energy Pty. Ltd. G0.4, 15 Bourke Road Mascot NSW 2015 Australia