Combined Heat and Power - Borehole Thermal Energy Storage (CHP-BTES) Micro-Grid Project

Transcription

1 Combined Heat and Power - Borehole Thermal Energy Storage (CHP-BTES) Micro-Grid Project Bruce McFarlane, Christenson Developments Michael Roppelt, GSS Integrated Energy Canadian National GeoExchange Conference, May 2-3, 2013

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3 Southwoods Sustainable Community Energy System Christenson Developments is redeveloping Southwoods 19-acre townhome rental community increasing densification by building seniors apartment complexes, and relocating townhomes requiring upgrades to the services infrastructure and energy efficiency retrofits to the existing townhomes.

4 Southwoods Sustainable Community Energy System.Why? Increasing densification by relocating affordable rental townhomes to allow for five 4-storey affordable seniors apartment complexes The process will require onsite infrastructure upgrades and energy efficiency retrofits to the existing townhomes. Installation of a cogeneration-btes integrated system to meet electrical, domestic heating, cooling and hot water supply suitable for over 400 residential units. Why?...Cost of Utilities, our site must be affordable. Less stress on surrounding City services.

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6 Sustainable & Resilient Development

7 Sustainability & Resiliency Benefits Security in self owned utility as a capital asset value with 3 rd party Operations & Maintenance Typical savings of 45% - 50%. And payback periods of 3-7 years Distributed electrical smart micro-grid technology with grid feed-in to offset costs Improving life quality and profitability by reduction of utility bills Scalable to development growth or build-out Improved reliability of electrical power supply Maximizing on-site energy utilization efficiency Smart usage of energy hydrocarbons consumption reduction Positive Environmental Impact

8 Integrated Community Energy System with Smart Micro-Grid This includes community scale district energy, utilities services and buildings designed to integrate the new Innovative technologies to improve energy efficiency and reduce GHG emissions. Technologies include: Natural gas CHP Cogeneration with Borehole Thermal Energy Storage Low temperature distribution network using heat pumps. Distributed electrical smart micro-grid technology. Treated storm water and grey water reuse.

9 Combined Heat and Power Borehole Thermal Energy Storage Technology (CHP-BTES)

10 CHP + BTES Integrated Energy Natural Gas Cogeneration & Borehole Thermal Energy Storage (BTES) can be used to meet all electrical power, heating and cooling demand loads. Use multiple CHP units and borefields. Install and operate in phases Natural Gas reciprocating powered CHP prepackaged units.

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12 Co-generation products The supply of pre-engineered co-generation products Lower cost Pre-engineered Guaranteed output & performance Compact design Remote communication

13 Electricity vs. Natural Gas demand In an Integrated Community Energy System, natural gas cogeneration (CHP) is used to meet power and heat needs. Matching community's electrical demands with cogeneration power plant electrical output will result in a seasonal and annual thermal imbalance. Borehole Thermal Energy Storage (BTES) controls this imbalance through the storage and transfer of hot or cold thermal energy and delivered to ground source heat pumps or conventional air handlers.

14 Borehole Thermal Energy Storage Value as compared to Natural Gas Price* Price of Natural Gas EFFICIENCY $2.50 $5.00 $7.50 $10.00 $12.50 $15.00 GEOTHERMAL $7, $15, $23, $31, $39, $47, % $9, $19, $29, $38, $48, $58, % $12, $24, $36, $48, $60, $72, % $14, $29, $43, $58, $72, $87, % $17, $34, $51, $68, $85, $102, % $19, $38, $58, $77, $97, $116, $140, $120, $100, $80, $60, $40, $20, $0.00 $2.50 $5.00 $7.50 $10.00 $12.50 $15.00 Underground Energy, LLC The ground heat exchanger (GHX) array for a dynamic geothermal BTES system is designed and operated in such a manner that heat is stored or abstracted seasonally, whereas conventional passive geothermal systems are designed to simply dissipate heat or cold into the subsurface. BTES essentially uses the Earth as a rechargeable thermal battery, as opposed to a radiator. (*Based on 239 kw CHP)

15 Value of the BTES in Fuel Market Changes? GSS Integrated Energy Cost Output Fees Output Cogen - BTES $/ kw $/ hr $/ kw $/ hr $/ hr $/ hr Annual $/ Yr Savings Current Market (Alberta) Value of Electricity (kw) ## $0.09 $21.51 $0.07 $17.21 $0.16 $ ,093,640 $339, Domestic Hot Water (Gj) 0 $5.99 $1.20 $3.77 $0.75 $9.76 $1.95 1,752 $17, BT ES (recovered heat) (Gj) 80% eff 1 $5.99 $6.65 $3.77 $4.19 $9.76 $ ,779 $75, BT ES geothermal (Gj) 0 $5.99 $2.16 $3.77 $1.36 $9.76 $3.52 3,162 $30, HP Eff. (+20%) (kw) 19 $0.09 $1.71 $0.07 $1.37 $0.16 $ ,440 $26, BTES $133, Total $40.67 Retail Value $490, C+F Total Energy Total Value Net Value/ CHP Fuel Consumption (Gj) 3 $5.99 $16.17 $2.03 $5.48 $8.02 $ ,652 $189, Maintenance (kw) ## ,093,640 $37, Cost $227, Savings $262, Gas +50% & Electric -50% Value of Electricity (kw) ## $0.05 $11.95 $0.04 $9.56 $0.09 $ ,093,640 $188, Domestic Hot Water (Gj) 0 $9.00 $1.80 $5.67 $1.13 $14.67 $2.93 1,752 $25, BT ES (recovered heat) (Gj) 80% eff 1 $9.00 $9.99 $5.67 $6.29 $14.67 $ ,779 $114, BT ES geothermal (Gj) 0 $9.00 $3.25 $5.67 $2.05 $14.67 $5.30 3,162 $46, HP Efficiency (+20%) (kw) 19 $0.05 $0.95 $0.04 $0.76 $0.09 $ ,440 $14, BTES $175, Total $24.44 Retail Value $389, CHP Fuel Consumption (Gj) 3 $9.00 $24.30 $5.67 $15.31 $14.67 $ ,652 $346, Maintenance (kw) ## ,093,640 $37, Cost $384, Savings $4,956.67

16 BTES System Design Analogous to a rechargeable battery as it can absorb, store or supply thermal energy on demand. Sequence of vertical boreholes at various depths in a strategic array designed to reduce thermal losses. Smaller borefield required to extract equivalent energy Advanced controls manipulate the transfer of energy to multiple thermal zones to reduce or eliminate short term storage tanks.

17 Phase 1: Preliminary Site Evaluation

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19 Canadian National GeoExchange Conference, May 2-3, 2013 Combined Heat and Power - Borehole Thermal Energy Storage (CHP-BTES) Micro-Grid Project Bruce McFarlane, Christenson Developments Michael Roppelt, GSS Integrated Energy