© PowerWise Systems www.powerwisesystems.com

Evaluating Heat Pump EfficiencyPowerWise Systems is undertaking a state-funded study to evaluate the efficiency of heat pumps. In this presentation, we will explain the monitoring configurations for different heat pumps, how to ensure consistent data streams, how to use wireless communications to simplify installation, and how to calculate energy efficiency ratio and coefficient of performance.

Agenda

• PowerWise Systems Background & Company facts• Prior heat-pump monitoring projects• Monitoring technology• ASHP monitoring • HPWH monitoring• GSHP monitoring• Conclusions & what have we learned• Current GSHP project in New England• Q&A

About PowerWise

• Facts about PowerWise

Company Confidential

About PowerWise

• It started with PowerHouse Dynamics Inc. (PHD)• Founded in 2007 by Carsten Steenberg• eMonitor concept solution invented in 2007/2008 First

generation early 2009 (12 installs in VT VEIC employees) • UI/Dashboard architecture/design, web & marketing

material: Richard Merrill• Dashboard & database architecture: Curtis Meadow

About PowerWise

• PowerHouse Dynamics today.• Only focus on commercial fast-food, restaurant & retail

chains stores• More than 5,000 systems installed, major accounts incl.

Arby’s, Ann Taylor, Chili’s, Dunkin Donuts, Burger King, Wendy’s

About PowerWise

• PowerWise Systems (a DBA Intellergy, Inc)

• Founded Jan 2010 by Carsten Steenberg, Curtis Meadow & Richard Merrill

• Quickly becoming by far the most successful eMonitor/SiteSage reseller for PHD –Still the facts.

• Now a Master Distributor for PHD & handles all residential sales• Led to co-development of new PHD eMonitor Gateway with

direct sensor support.

• PowerWise today• Strong profitable business with a talented and experienced

R&D team and a strong IP with a family of software , hardware modules & patent pending for very fast pattern matching algorithm technology.

About PowerWise

• PowerWise Systems Core Business today • Building Management Segment commercial • Monitoring and Control systems for high performance

homes/buildings. (60% of PH projects using PW technology)• eMonitor/SiteSage Sales: direct & distribution• Solutions based on our own HW & Dashboard modules.• Stand-alone Custom Dashboards for 3rd party data• OEM development• Hybrid offerings of the above solutions

About PowerWise

• Solutions based on our own HW & Dashboard modules

About PowerWise

• inView Navigator• Advanced Modular Dashboard design tools• Custom dashboards made easier & faster

• Customer admin with drag and drop interface for• Adding/editing sensors• Adding/arranging dashboard modules

About PowerWise

• True Custom Dashboard design service

Company Confidential

About PowerWise

• Own Hardware products• inDAC – Sensor Controller Input Analog, Digital, Pulse, 1-Wire, Modbus, Serial • inControl – Output Relays, Variable 4-20mA, Modbus Zigbee Radio• inGate – Powerful Gateway, Modbus Zigbee or Z-Wave Internal memory up to

32GB• inBridge- Wireless Modbus Bridge, including 1-Wire bus, RH & T sensors• inSense RH & T – 1-Wire Sensor• inSense CO2, RH & T– 1-Wire Sensor• inSense VOC, RH & T– 1-Wire Sensor• SensorHub – Provide power to 1-Wire sensors if inDAC not used

Company Confidential

Prior heat pump projects

• Prior heat pump projects • VEIC and (mini-splits)• PowerWise has supplied More than 500

systems for heat pump efficiency monitoring• Early requests were for GSHP – compare

electrical consumption vs savings in oil/gas• Utilities made a case -ASHP vs Oil/Propane

(Emera/Bangor Hydro ME)

• Sophisticated efficiency monitoring project (VEIC VT)

General Heat Pump Monitoring

• HardWare Technology Normally used• SiteSage/eMonitor + inDAC sensor controller +

sensors & meters • inGate gateway, inDAC sensor controller +

sensors & meters (WattNode)

General Heat Pump Monitoring

• Sample Monitoring setup using wireless technology

inView Navigator platform

ASHP –Mini Split

ASHP –Mini Split

• Systems monitored

HPWH –Domestic hot water heat pump

• Systems monitored

HPWH –Domestic hot water heat pump

• Systems monitored

Ground Source Heat-Pump

Conclusions & what have we learned

• COP Coefficient Of Performance• COP = (The change in the heat level of an area) / (The

energy consumed) • Heat-Pumps are expected to have GOP values of 3-4 as

opposed to a COP of 1 for a conventional electrical resistance.

• In general heat-pump are meeting the specs 85-95%• Correct installation is key – we did see a few system that was

not pressurized correctly.• Common sense temperature set points and use • Heat-Pump technology has improved the last 5 years • Still makes sense –even with the low oil/gas prices

Conclusions & what have we learned

• Thermostat like control of ASHP Helps!

Thermostat simulation

IR Remote controlSimulation

Current State Project in New England

• Systems monitored• Ground source heat pumps• Biomass/pellet boilers

• State-funded project• Installations are ongoing

Monitoring Configuration – Core Components

Make It Pretty

• Enclosure for core components. • Hardware powered from equipment for

ease of install. • Reduce chances for equipment to be

disturbed

Monitoring Configuration – GSHP

• Ground Source Thermal Energy Meter (BTU)• Flow, Supply & Return Temperature,

Energy, & Power

• Electrical Consumption Meter• Voltage, Current, Power, & Energy• Back-up Resistance Heat

Monitoring Configuration – GSHP

Ground Source Heat Pump – Basic Dashboard

Ground Source Heat Pump – Basic Dashboard

Installations - What Experience Has Taught Us

• Online survey to gather basic info• Site visits are helpful:

• Locations of equipment• Pipe material and dimensions• Network access• Can we install monitoring equipment?• Participant concerns• Ability to isolate the heat pump, in case other

systems are installed

Installations - What Experience Has Taught Us

• Planning is key• Expect the unexpected• Walk before you run• Make sure installers are well trained

Network Access

• Ethernet is the most reliable• Possible to run Ethernet cable?

• Location of router/modem in relation to monitoring equipment

• Wifi available near monitoring equipment?• Wifi dongles• Does the building owner change passwords

often?

Data Security

• Secure username and password access to online portals

• inGate has SD card to buffer data if network is down – 2 months storage is plenty

Project Status

• Installations ongoing (15 of 50 installs done)• Initial data being collected

Thank You!

Product specs and technical informationwww.powerwisesystems.com

ContactsCarsten SteenbergCarsten@powerwisesystems.com 207-266-3564

Ray Toothaker ray@powerwisesystems.com 207-591-4315

Christian Gilbert Christian@powerwisesystems.com 207-266-4922