Jack Mc Gowan, CEMJack Mc Gowan, CEM
Optimize operating cost for cooling Optimize operating cost for cooling Improve Capital ProjectsImprove Capital ProjectsImprove learning environmentsImprove learning environments
GHP Best PracticesGHP Best Practices
Geothermal Geothermal Heating and Heating and
CoolingCoolingLessons Learned from NMLessons Learned from NM
Geothermal Heat PumpGeothermal Heat PumpInstallationsInstallations
HVAC System OptionsHVAC System Options
Geothermal Heat Pump TechnologyGeothermal Heat Pump Technology
Installation OptionsInstallation OptionsMethods to implement best practicesMethods to implement best practices
Success StoriesSuccess Stories
The futureThe future
AgendaAgenda
“Do Nothing” is not an option in most cases
System OptionsBoiler & Chiller with Fan Coils or other unitary
Requires Classroom Ventilation units
Package Roof top Units (DX or Evaporative)
Geothermal Heat Pumps (GHP)Requires Classroom Ventilation units
GHP is a trend and offers Value
Question: How to do it right?
Heating & Cooling OptionsHeating & Cooling Options
Main Components of Fan Coil Systems The Mechanical System
• Boilers, Chillers, Cooling towers use more energy & water. Require specialized service
• Systems require addition mechanical area and must to effectively implemented
• Interior piping is a challenge
• 20 to 25 year equipment life
The Learning Environment
• Less efficient heating and cooling system
• Requires ventilation air for classroom codes
• Cumbersome control process with one thermostat for multiple rooms leads to poor learning environment
Console UnitsFan Coil Units
Piping System
Boiler Chiller
CoolingTower
Cost Estimates
• Higher first cost due to large equipment
• Higher Operating and Maintenance cost
• Not likely to be approved by State
Main Components of Roof top Systems
The Learning Environment
• One unit for two or three classrooms makes for poor learning environment
• Provides ventilation air for classroom codes
• One thermostat for multiple rooms is a comfort problem
Cost Estimates
• Higher first cost due to larger equipment
• Higher Operating and Maintenance cost
• Not likely to be approved by State
The Mechanical System
• Boilers and Cooling towers use more energy & water. Require specialized service
• Systems also require addition mechanical area and must to effectively implemented
• 10 to 15 year equipment life
Benefits of the GHP System
Annual Cost: Energy Maintenance
$200,000
$150,000
$100,000
$ 50,000
$ 25,000
$ 15,000
Geothermal Heat Pump - Energy
Roof top Unit - EnergyFan Coil - Energy
Geothermal Heat Pump - MaintenanceRoof top Unit - Maintenance
Fan Coil - Maintenance
Energy & Maintenance Cost• GHP lower, less volatile energy cost• GHP much lower in maintenance• Qualify learning environment
Life Cycle Cost• GHP 5 to 10 years longer life• Energy and maintenance savings produce cost benefits over time
When the GHP decision is made…When the GHP decision is made… Owner must decide based on needs & benefitsOwner must decide based on needs & benefits
Energy and Environmental CostsEnergy and Environmental Costs
Learning EnvironmentLearning Environment
Consider best practices and enlisting support Consider best practices and enlisting support from GHP expert in design processfrom GHP expert in design process
Consider specifying a specialty contractorConsider specifying a specialty contractorSingle point of accountabilitySingle point of accountability
Proven performanceProven performance
Long term supportLong term support
GHP Installation ProcessGHP Installation Process
GHP System: Main ComponentsThe Earth Heat Exchanger (outside)• The EHX design is a fundamental issue. • Integrated processes critical for efficiency
and reliability of installation in long term:– Design Engineering Assistance– Drilling, Looping, & Grouting – Trenching, Headering & Manifolding– Test, Meter, Verify and Acceptance
• Life expectancy 20 - 25 years• Interior piping may still be a challenge
The Learning Environment• Most efficient heating and cooling system• Decentralized design: each heat pump is
installed close to zone/classroom it serves.• GHP heat pump is easy to service and does
not require specialized training• Lower Energy & Maintenance cost• One unit & thermostat for each classroom• Provides ventilation air for classroom codes
Horizontal Units
Console Units
Vertical Units
350-400 feet deep
Cost Estimates• Higher first cost repaid energy/service cost
GHP Best PracticesGHP Best Practices
Air Loop
Ground Loop
Refrigerant Loop
Domestic Hot Water Loop
ISO 13256-1 IGSHPA
Turnkey responsibility for full scope of workTurnkey responsibility for full scope of workNew Mexico Proven Performance & LicensedNew Mexico Proven Performance & Licensed
Require bidders to demonstrate experienceRequire bidders to demonstrate experience Optimize equipment qualityOptimize equipment quality
All BACnet based controls & other standards throughoutAll BACnet based controls & other standards throughout 5 year Performance Guarantee on full system5 year Performance Guarantee on full system
Air Vents
Shut Off Valves
Pressure/Temp. Ports
Multiple Parallel Header Pipes (3 inch)
Main Supply Header ( 8 inch)
1- inch vertical loops, Heat fusion joined, Flanged connections
Quality in every processQuality in every process
Success StoriesSuccess Stories
Phase 1: 400 Wing & Tiger PitDistrict-wide Energy & Controls
Phase 1: Balance of High School
Yucca Elementary
Heights Elementary… this summer
Commercial Project too…Commercial Project too…El Monte SagradoEl Monte Sagrado
Summit At Cottonwood WSHPSummit At Cottonwood WSHP
Smart SystemsEfficient SystemsDashboards
Energy performanceCarbon footprint
Optimize Maintenance & Performance
Demand ResponseGridWise
Electric System Price signals & interoperability
The FutureThe Future