Hotels: Water and Energy

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1 Hotels: Water and Energy

2 Agenda 01 Introduction 05 Hotel System Options 02 Company Overview 06 Hotel Energy Conservation 03 Hotel Energy & Water Use 07 Hotel Project Examples 04 Design Philosophy

3 Introduction to Vanderweil Boston, MA New York, NY Princeton, NJ Philadelphia, PA Alexandria, VA Los Angeles, CA Phoenix, AZ Atlanta, GA Orlando, FL Miami, FL Mechanical Electrical Plumbing Fire Protection Power & Utilities Transmission & Distribution Substation Sustainability LEED Services Energy Modeling Commissioning

4 Markets We Serve Government Institutional Academic Commercial Cultural Hospitality & Entertainment Healthcare Industrial Power & Utilities Science & Technology Sports, Venue and Event Transmission & Distribution Envoy Hotel, Boston, MA Marina Bay Sands Hotel & Casino

5

6 Where to start? Where to go next? Reduce the Energy and Water Demand (load) Serve the loads efficiently Recover energy & water Renewable

7 Consider the load: climate, massing, and orientation South Solar Gain BTU/ft Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec BTU/ft East Solar Gain BTU/ft West Solar Gain

8 What s wrapped up in the envelope? 15-20% of the energy!

9 ENERGY where does it go? Envelope performance reflects glazing properties and insulation levels typically found in buildings during the 1970s

10 What s going down the drain?

11 Guestroom Mechanical System Options PTAC / VTAC Variable Refrigerant Flow (VRF) Heat Pumps 2-pipe FCU / Electric Heat 4-pipe chilled water / hot water

12 Ventilation Options Fixed Ventilation / Code Minimum Increased Ventilation: LEED, WELL Variable/Demand Controlled Ventilation

13 Ventilation Options Energy Recovery o Fixed Plates o Run-around Loops o High Pressure Glycol o Energy Wheels

14 Hotel Energy Conservation Measures: Tier 1 o LED lighting upgrades o Low flow plumbing fixtures o Constant airflow regulators / code OA level o Base room control system / HVAC occupancy based o Commissioning

15 Energy Conservation Measures: Tier 1I o Increased room controls lighting, plug control o High efficiency chiller / boiler replacements o Variable speed drives pumps, kitchen hoods, fans

16 Energy Conservation Measures: Tier III o Envelope upgrades o Demand ventilation control o Room HVAC upgrades 2-pipe to 4-pipe o Full room controls w/ plug load controls, blind control, door interface, front desk interface

17 Energy Conservation Measures: Tier III o Building Automation System o Heat recovery o Heat recovery chiller o Fuel Cells, Combined Heat and Power o Renewables

18 Hotel Renovation Projects Courtyard by Marriott Tremont Lighting upgrades Plumbing fixture upgrades Hilton Hotel Boston Multiple bay suites converted to individual guestrooms Lighting Plumbing Outdoor air upgrades

19 Making the Case: Energy + Deferred Issues Mold and mildew = Poor Air Quality Leaking pipes = Excess Water, Excess Energy Malfunctioning Equipment = Excess Energy

20 Pathway to Reduction Glazing replacement Increased insulation in wall/roof assemblies Energy Conservation Measures Advanced lighting systems Smart keycard to enable guest room lighting Dedicated outdoor air system with energy recovery Decoupled ventilation & space conditioning systems Low flow domestic hot water fixtures

21 Energy Conservation Measure Analysis 20% ENERGY COST SAVINGS (%) 18% 16% 14% 12% 10% 8% 0.8% 1.4% 1.9% 1.6% 2.4% 0.3% 0.8% 1.0% 1.2% 3.4% 3.0% % 4% 2% 0% Improve Envelope by 20% Improve Glazing by 20% Reduce Glazing to 40% Reduce Lighting by 20% Reduce Lighting by 30% Reduce Kitched Load Reduce DOAS SP by 25% with FCUs ilo VAV Air Cascade Air Cascade w/ DOAS + FCUs Solar Thermal DHW Remove East Canopy

22 Hotel ECMs: Update Controls

23 Before and After: Energy Upgrades Reflects inclusion of all energy conservation measures

24 Before and AFTER Complete MEP demolition and replacement New fan coil units Room control systems LED lighting Low flow plumbing fixtures Low-e glass upgrade

25 Measurement: The Final Frontier Annual Electrical Usage Peak Off Peak Jan 28-Feb 30-Mar 29-Apr 29-May 28-Jun 28-Jul 27-Aug 26-Sep 26-Oct 25-Nov 25-Dec Energy Usage: Energy Use (BTU) 25,000 20,000 15,000 10,000 5, /23/2012 8/23/2013 8/23/2014 Axis Title $10, $8, $6, $4, $2, $0.00 Usage (Therms) Usage (Cost)

26 Thank you! Questions? Presented by: Julia Rogers, LEED AP BD+C Sustainable Design Practice Leader Paul Van Kauwenberg, PE, LEED AP BD+C Associate Principal

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