Center for Energy Research at UNLV. Villa Trieste Homes Building Reduced-Energy Homes in the Southwest U.S. Desert

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Brittany Bell
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1 at UNLV Villa Trieste Hmes Building Reduced-Energy Hmes in the Suthwest U.S. Desert

2 Reduced Peak Energy Hmes (2008 t 2013) UNLV s (CER) received a very large cntract frm the U.S. Department f Energy fr a husing develpment in Las Vegas, Nevada, that can be used t study techniques f reducing peak electrical demand. UNLV s partners in develping these hmes are NV Energy and Pulte Hmes. Knwn as the Villa Trieste cmmunity f hmes, this develpment invlves: Significant energy cnservatin in 185 hmes and Phtvltaic units fr slar energy n the rfs f these hmes. A system that allws the hmewner t select the degree f energy savings desired while wrking in harmny with the utility s need fr peak lad cntrl. Applicatin f peak-shifting strage batteries. The gal is t decrease the peak electrical demand by 65% ver cde-minimum building designs f the same size. These huses have garnered the prestigius LEED Platinum classificatin.

46062 2343 Villa Rma Las NV Vegas Trieste Design Details General Infrmatin Flr areas f these single-family, tw-stry huses range frm 1487 t 1960 square feet.

3 Villa Rma Las NV Vegas Trieste Design Details General Infrmatin Flr areas f these single-family, tw-stry huses range frm 1487 t 1960 square feet. The buildings are extremely energy-cnserving, with a HERS rating f withut the PV system cnsidered, and a HERS rating f including the PV system impact. Standard features A tankless water heater A dashbard that gives the resident energy cnsumptin/generatin infrmatin R-7 exterir drs 92 AFUE furnace 100% CFL lighting 2x4 and 2x6 cnstructin, with 1 inch f EPS and blw-in cellulse (R-13 and R-19 depending upn the stud size) Windws with a 0.34 U factr and a 0.32 SHGC A 15-SEER air cnditiner Unvented (semi-cnditined space) attic Rma mdel, 1487 sqft (Surce: Pulte Hmes)

4 Design Details Slar Energy Each hme has phtvltaic (PV) tiles incrprated in an integrated fashin n its rf. This decreases the HERS rating fr the Rma mdel, fr example, frm 55 t 39. Because f the nature f the develpment plan fr Villa Trieste, all f the huses will have a PV system with a nearly suth expsure, nearly west expsure, r nearly east expsure.

46062 2343 Villa Rma Las NV Vegas Trieste Design Details Energy cnservatin features Abve, the

huse. At right, the difference between batt insulatin, used in traditinal huses, and blwn-in

5 Villa Rma Las NV Vegas Trieste Design Details Energy cnservatin features Abve, the cnditined attic, which allws the HVAC ducts t be in the same temperature as the interir f the huse. At right, the difference between batt insulatin, used in traditinal huses, and blwn-in insulatin, used in Villa Trieste. Bth sides f the stud have the same piping and electrical installatins.

6 Design Details The size f these arrays manufactured by Sun Pwer Crpratin is rated at kw peak utput. They are cnnected t the NV Energy grid in a net metering arrangement. Each kwh sent t the utility is treated as the same ecnmic value as each kwh used frm the utility.

7 Design Details UNLV s Intelligent Server prvides instantaneus Infrmatin n the cst f pwer frm NV Energy t the hmewners. In this way, the hmewners can adjust energy settings n their thermstats and ther cntrls during peak demand hurs in rder t save energy and mney.

2343 Villa 82109 Las NV Vegas Trieste Design Details Cmmunicatin System, Intelligent Agent, and Lad Cntrl An intelligent agent is being develped that is equivalent t a dial that the custmer can set t

8 2343 Villa Las NV Vegas Trieste Design Details Cmmunicatin System, Intelligent Agent, and Lad Cntrl An intelligent agent is being develped that is equivalent t a dial that the custmer can set t any chice frm N mdificatin f energy lads t Full mdificatin f energy lads. Fr a Full mdificatin f energy lads setting, an arrangement will be develped in advance between the utility and custmer, where each event f lad shedding that the utility is allwed wuld have sme type f reimbursement assciated with it. Included in the events might be: Cntrl f the hme thermstat fr predefined perids The ability t turn ff pl pumps, when present Cntrlling plug lads Each f these elements wuld save bth the utility and custmer mney.

Design Details Cmmunicatin System, Intelligent Agent, and Lad Cntrl An internet cmmunicatin system has been develped t allw signals t be relayed frm the utility t the custmer and frm the custmer t

9 Design Details Cmmunicatin System, Intelligent Agent, and Lad Cntrl An internet cmmunicatin system has been develped t allw signals t be relayed frm the utility t the custmer and frm the custmer t the utility. One f the purpses f this cmmunicatin link is t transmit pwer cst infrmatin t the custmer nearly instantaneusly, and t allw the custmer t respnd t this infrmatin. In general, pwer csts increase during peak demand perids; if the custmer knws this infrmatin, then actin culd be taken by the custmer t shed lad. This active participatin in the cst infrmatin exchange greatly cntributes t reduced energy cnsumptin in the hmes. The custmer als can pt t set preferences n the Intelligent Agent t have this activated autmatically.

2343 Villa 82109 Las NV Vegas Trieste Design Details Cmmunicatin System, Intelligent Agent, and Lad Cntrl By perating n a whle cmmunity, the utility strategy will

10 2343 Villa Las NV Vegas Trieste Design Details Cmmunicatin System, Intelligent Agent, and Lad Cntrl By perating n a whle cmmunity, the utility strategy will be such that each hme is affected fr nly shrt perids f time. Staggering the lad cntrl thrughut the cmmunity will result in a net decrease in lad at the substatin.

11 Design Details (Right) Battery strage unit in a hme. At left is an n-demand water heater. Battery Energy Strage System A Battery Energy Strage System (BESS), installed in a selected subset f huses, is being evaluated fr its effectiveness. The final phase f the prject develpment is the installatin and evaluatin f several ladshifting batteries. This system will stre electrical energy frm the grid at night and be ready t shave peak lads during the day. This particular functin is the final chice ptin. If the varius ther aspects related t energy minimizatin and lad cntrl are unable t furnish the required peak reductin, the batteries will be called upn t assist in making this reductin.

12 Testing the System One f the issues in devising strategies fr making huses mre energy cnserving r fr decreasing peak electrical lads is t use a cmputer mdel f the huse perfrmance. This mdel incrprates mathematical descriptins a cmputer cde --hw well the key parts f the building functin, fr instance: If walls impede heat flw r Hw much energy is need fr the air cnditining unit t cl the huse Ambient weather cnditins and human chices fr energy use are impsed n this mdel. This chart cmpares the simulated cmputer results (red) with actual measurements frm a Villa Trieste hme fr a tw-day perid in early summer.

13 Testing the System Additinally, instrumentatin has been temprarily lcated in the huses fr detailed energy flw analyses. This is in additin t the measuring equipment used t furnish data t the dashbard.

14 Related Publicatins S. B. Sadineni, F. Atallah, R. F. Behm, Impact f Rf Integrated PV Orientatin n the Residential Electricity Peak Demand, APPLIED ENERGY, Vl. 92, 2012, pp R. Behm, Minimizing Peak Residential Electrical Demand in Ht Climates, 2 nd Asian-US-Eurpean Thermphysics Cnference Thermal Science fr Sustainable Wrld, January 3-6, 2012, Hng Kng. S. B. Sadineni, F. Atallah, R. F. Behm, Measurements and Simulatins fr Peak Electrical Lad Reductin in Cling Dminated Climate, ENERGY, Vl. 37, 2011, pp R. Behm, An Apprach t Decreasing Peak Electrical Demand in Residences, 2 nd Internatinal Cnference n Advances in Energy Engineering, 2011, Bangkk, Thailand. S. B. Sadineni, T. France, Rbert F. Behm, Ecnmic Feasibility f Energy Efficiency Measures in Residential Buildings, RENEWABLE ENERGY, 2011, Vl. 36, pp S. B. Sadineni, Srikanth Madala, Rbert F. Behm, Passive Building Energy Savings: A Review f Building Envelpe Cmpnents, RENEWABLE AND SUSTAINABLE ENERGY REVIEWS, 2011, Vl. 15, pp Suresh B. Sadineni, Fady Attallah, Rbert F. Behm, Measurements and Simulatins f Electric Demand frm Residential Buildings fr Peak Lad Reductin, ASME 5 th Internatinal Cnference n Energy Sustainability, August 7-10, 2011, Washingtn D.C. T. France, R. Hurt, R. Behm, and S. Sadineni, Hme Energy Cnservatin in the Las Vegas Valley, Prceedings f the ASME Cnference f Energy Sustainability, San Francisc, CA, 2009.

15 Resurces Mre details abut the Villa Trieste hmes can be fund at : Pulte Hmes website NV Energy hme page U.S. Department f Energy Office f Electricity Delivery and Energy Reliability Sun Pwer Crpratin

2343 Villa 82109 Las NV Vegas Trieste Fr Mre Infrmatin 100 Taylr Hall University f Las Vegas, Nevada Bx 454027 Las Vegas, NV 89154-4027 Phne: (702) 895-0429 Fax: (702) 895-1123 Directr: Rbert F.

16 2343 Villa Las NV Vegas Trieste Fr Mre Infrmatin 100 Taylr Hall University f Las Vegas, Nevada Bx Las Vegas, NV Phne: (702) Fax: (702) Directr: Rbert F. Behm, Ph.D., P.E. Phne: (702) bb.behm@unlv.edu C-Directrs: Yahia Baghzuz, Ph.D., P.E. Phne: (702) yahia.baghzuz@unlv.edu Yitung Chen, Ph.D. Phne: (702) yitung.chen@unlv.edu

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LONG ISLAND LONG ISLAND Internatinal Energy & Sustainability Cnference Octber 20, 2017 1 PSEG Lng Island Service Territry PSEG Lng Island perates the Lng Island Pwer Authrity s transmissin and distributin system under a 12-year