DOE Zero Energy Ready Home · 2017-06-03 · 10 0 . 500 . 1,000 . 1,500 . 2,000 . 2,500 . 0% . 100%...

Transcript of DOE Zero Energy Ready Home · 2017-06-03 · 10 0 . 500 . 1,000 . 1,500 . 2,000 . 2,500 . 0% . 100%...

1 | INNOVATION & INTEGRATION: Transforming the Energy Efficiency Market Buildings.Energy.gov

DOE Zero Energy Ready Home Tech Training Webinar Series

Building Energy Optimization Tool (BEopt)

The Home of the Future….Today

Presenter

Presentation Notes

DOE Zero Energy Ready Home is working with our industry partners to bring the home of the future to the market….. TODAY. Our partners – who are builders, energy raters, designers, utilities, manufacturers, and other building industry groups – are successfully applying proven systems to provide unparalleled levels of EFFICIENCY and PERFORMANCE in these homes. We’re running 4 hour training courses for builders and raters around the country….cannot get into all of the technical details in these courses --- which is why we’re running these technical webinars…. Along the way…there are key technical issues in designing and building such outstanding homes. To help support our partners in their efforts, DOE Zero Energy Ready Home is hosting a series of Technical Training webinars throughout 2014 on key topics.

Website • www.buildings.energy.gov/zero/ • Events:

• Upcoming in-person ZERH Trainings • Technical Training webinars • Conference Presentations

• Partner Locator • Program Specifications • Webinar Recordings Building America Solution Center • http://basc.pnnl.gov/

DOE Zero Energy Ready Home Resources

Presenter

Presentation Notes

This information is just a very short overview. The DOE Zero Energy Ready Home website offers many other resources – including an online Partnership Agreement for builders, verifiers, or training partners interesting in working with us.

http://www.buildings.energy.gov/challenge/

http://www.buildings.energy.gov/zero

http://www.buildings.energy.gov/challenge/

http://basc.pnnl.gov/

Thank You

For More Information:

www.buildings.energy.gov/zero

Email:

doechallengehome@newportpartnersllc.com

mailto:doechallengehome@newportpartnersllc.com

NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC.

DOE Zero Energy Ready Home

BEopt Training

Craig Christensen Scott Horowitz

5/15/2014

beopt.nrel.gov

2

Outline

• Background • Design Analysis

o Geometry Screen o Options Screen o Site Screen o Run o Output Screen

• Optimization Analysis o Path to ZNE o Validation o Options Screen o Run o Output Screen

• Library Manager • DView – Hourly Visualization

3

Schedule

BEopt v1.0

BEopt v2.0

2001 2014 2010

BPA (FY13-14) EnergyPlus vs.

SEEM validation

CPUC (FY11-14) Retrofit analysis, utility cost effectiveness tests,

incentives, etc.

ARRA (FY10-11) Updated platform, batch simulations

CEC (FY08-FY09) BEopt w/Micropas

CPUC (FY14-15) Multifamily

BPA (FY14) BEopt follow-on

Partner Contributions

CEC (FY15) CSE tool

CPS Energy (FY12) San Antonio

analysis

Development

Tool Research and Model Dev.

4

What is BEopt? (beopt.nrel.gov)

Features: • Design, parametric, optimization • New construction and retrofit • Detailed cost database • Rapid building drawing tool • Detailed utility rates (tiered, time-of-

use, real-time pricing) • PV compensation (net-metering,

feed-in tariffs) • Utility cost effectiveness tests • PV/efficiency incentives • Demand response • HPXML export • Schedule wizard • Output visualization • Metrics: LCC, NPV, SPP, LCOE, CO2 • Batch simulations • Library manager • …

Heating Cooling Lighting

Appliances Other Efficiency

PV/SHW

Energy Use Utility Bills

Optimal Building Designs

BEopt

EnergyPlus (DOE2)

Plug-and-Play Optimization Software

5

Case Study

Denver Habitat for Humanity Zero Energy Home

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BEopt GUI

Geometry

Site

Options

Input

Output

Run

7

Live Demo

8

Minimum-cashflow designs at various energy-savings levels

The Path to Zero Net Energy

9

0

500

1,000

1,500

2,000

2,500

0% 100% Source Energy Savings (%)

Mor

tgag

e In

cr. +

Util

ity B

ills

($/y

ear)

mortgage

utility bills

cash flow

100% utility bills

energy-related cash flow

energy savings relative to base

Presenter

Presentation Notes

The ‘path to zero net energy’ can be shown conceptually on this type of graph with energy savings on the x-axis and total annual costs (related to energy) on the y-axis. For the base-case building, the annual costs are entirely due to utility bills.

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0

500

1,000

1,500

2,000

2,500

mortgage

utility bills

cash flow

Mor

tgag

e In

cr. +

Util

ity B

ills

($/y

ear)

Mortgage increment to pay for efficiency

Reduced energy costs

Presenter

Presentation Notes

… from the base case, there are some no-cost or low-cost options available for saving energy, so the cash flow curve follows the utility bill cost line. … as the building design is further improved, utility bills are reduced, while there are increased mortgage payments to pay for the EEM’s. Annual costs are at a minimum at Point 2 which, in strictly economic terms, is a global optimum for the homeowner. The slope of the cash flow curve represents the marginal cost of saved energy minus purchased utility energy. So, at point 2, the cost of the last unit of saved energy just equals the cost of buying energy from the utility.

11

0

500

1,000

1,500

2,000

2,500

mortgage

utility bills

cash flow

Mor

tgag

e In

cr. +

Util

ity B

ills

($/y

ear)

PV

$ efficiency > $ PV

Presenter

Presentation Notes

… continuing on, mortgage payments increase more rapidly (due to diminishing returns on EEM’s). At point 3, the net marginal cost of EE (indicated by the slope of the curve) equals the net cost of PV power. Beyond this point, it is more cost-effective to invest in PV than to do more EE. If we continue to add EEMs beyond point 3, the cash flow curve would trend upward with an increasingly steep slope.

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0

500

1,000

1,500

2,000

2,500

mortgage

utility bills

cash flow

Mor

tgag

e In

cr. +

Util

ity B

ills

($/y

ear)

0% energy costs

Presenter

Presentation Notes

With more and more PV, ZNE is eventually achieved. At this point, utility bills are zero (at least in theory, with net metering) and the annual energy-related costs are comprised entirely of mortgage payments for the EE and PV. A potential advantage to the homeowner is that susceptibility to future rate increases and utility price volatility is eliminated.

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0

500

1,000

1,500

2,000

2,500

Mor

tgag

e In

cr. +

Util

ity B

ills

($/y

ear)

Presenter

Presentation Notes

The ‘path to zero net energy’ can be shown conceptually on this type of graph with energy savings on the x-axis and total annual costs (related to energy) on the y-axis. For the base-case building, the annual costs are entirely due to utility bills.

14

Reference Building

PV More Efficient

Building Designs

Zero Net Energy

Validation

15

Parametrics (~750,000 simulations)

Optimization (~750 simulations)

Sequential Search:

Exhaustive Enumeration:

Validation

DOE Zero Energy Ready Home · 2017-06-03 · 10 0 . 500 . 1,000 . 1,500 . 2,000 . 2,500 . 0% . 100%...

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