Howard Comm Howard Commun unity Co ity College llege Student Serv Student Services Buil ices Building ng Co Colu lumbia, MD mbia, MD Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege Presentation Overview Student Serv Student Services Buil ices Building ng •Building Summary Co Colu lumbia, MD mbia, MD •Existing Mechanical System •Depth Topic: Proposed Geothermal •Breadth Topic: Constructability /Cost •Summary Jason Paul Fair •Acknowledgements Mechanical Option
Howard Comm Howard Commun unity Co ity College llege Owne Owner: r: Howard Community Co Howard Commu nity Colle llege ge Building Summary Student Serv Student Services Buil ices Building ng C M: C M: Riparius Rip rius Const Construction, uction, Inc. Inc. Co Colu lumbia, MD mbia, MD •Project Team Architect: Architect: Design Collective, Design Col ctive, Inc. Inc. ME MEP P Mu Mueller As r Associates ates, Inc , Inc. Structura Structural Smis Smislova, Kehn lova, Kehnemui emui & Associates & Associates Civil Civil Patton tton Harris rris Rust & Rust & Associa Associates es Geo Tech Geo Tech Froeh Froehling ing & R Robertson, bertson, Inc. Inc. Jason Paul Fair Mechanical Option
•101,00 01,000 sqft 0 sqft Howard Comm Howard Commun unity Co ity College llege Building Summary Student Serv Student Services Buil ices Building ng •Mixed Use xed Use Co Colu lumbia, MD mbia, MD •Project Team •Layout Layout •Overview Jason Paul Fair Mechanical Option
Presentation Overview Howard Comm Howard Commun unity Co ity College llege •Chill Chiller / B r / Boil iler pl er plants ants Student Serv Student Services Buil ices Building ng •Building Summary •AHU’s AHU’s ducted to VAV boxes ucted to VAV boxes Colu Co lumbia, MD mbia, MD •Existing Mechanical System Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege •Primary Primary / S / Seconda condary Configuration y Configuration Existing Mechanical Systems Student Serv Student Services Buil ices Building ng Co Colu lumbia, MD mbia, MD •500 ton Chiller & Coo 500 ton Chiller & Coolin ing Tower g Tower •Chilled Water Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege •Primary Primary / S / Seconda condary Configuration y Configuration Existing Mechanical Systems Student Services Buil Student Serv ices Building ng Co Colu lumbia, MD mbia, MD •Two 3100 MBH Dual Fue Two 3100 MBH Dual Fuel Boilers Boilers •Chilled Water •20 200 o F supply F supply 160 160 o F retu F return rn •Heating Water •AHU Heat AHU Heatin ing Co g Coils •VAV Reheat Co VAV Reheat Coil ils •Domestic Hot Wat Domestic Hot Water Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege AIR HANDLING UNITS Total Airflow (cfm) Outside Existing Mechanical Systems Student Serv Student Services Buil ices Building ng Air Desig. Type Location Service Max Min (cfm) •6 AHU’s 6 AHU’s AHU1 Roof Top Roof North 1st, 2nd, 3rd 36,300 13,100 6,300 Colu Co lumbia, MD mbia, MD •Chilled Water AHU2 Roof Top Roof South South wing 2,3 32,300 11,300 10,300 AHU3 Roof Top Roof South South wing 4 11,000 7,100 6,500 •3 roof 3 roof top top AHU4 Indoor MER 105 North wing 1 9,000 2,800 1,900 •Heating Water AHU5 Indoor Basement MER South wing 1 dining 15,000 8,700 7,200 AHU6 Indoor Basement MER South wing 1 kitchen 5,700 5,700 5,700 •3 indoor 3 indoor TOTAL . 109,300 48,700 37,900 •Air Handling Equipment • Prov Provide S ide SA to V to VAV boxes V boxes Jason Paul Fair Mechanical Option
Presentation Overview Howard Comm Howard Commun unity Co ity College llege •Pl Plenum mounted enum mounted Student Serv Student Services Buil ices Building ng •Building Summary Heat Pumps Heat Pumps Co Colu lumbia, MD mbia, MD •Existing Mechanical System •Interconne Interconnected run- cted run- •Depth Topic: Proposed Geothermal around l ound loop oop •Geotherma Geothermal l loop oop connect con ection on Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege •Open Loop Open Loop Mechanical Depth: Geothermal Student Serv Student Services Buil ices Building ng Extraction & Extraction & Co Colu lumbia, MD mbia, MD •Ground Source Heat Exchanger Inject jection We ion Wells lls •Strict EPA Strict EPA Regul Regulations tions •Equipment fou Equipment foulin ing g due to mineral due to mine rals Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege •Cl Closed Loop osed Loop Mechanical Depth: Geothermal Student Serv Student Services Buil ices Building ng Surface Water Surf ace Water Colu Co lumbia, MD mbia, MD •Ground Source Heat Exchanger •Deep water Deep water requ required ired •Fluctuation in water Fluctuation in water temp temp Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege •Cl Closed Loop osed Loop Mechanical Depth: Geothermal Student Services Buil Student Serv ices Building ng Horizontal Horizontal Co Colu lumbia, MD mbia, MD •Ground Source Heat Exchanger •Large Area Large Area •Fluctuation in Fluctuation in su surfa rface tempe e temperature ature Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege •Cl Closed Loop osed Loop Mechanical Depth: Geothermal Student Serv Student Services Buil ices Building ng Vertica Ve rtical Colu Co lumbia, MD mbia, MD •Ground Source Heat Exchanger •Mi Mini nimal ar area •Constant l Constant loop oop tempe temperatu ature •Expensive Drilling Expensive Drilling Costs Costs Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege •Hybrid System Hybrid System Mechanical Depth: Geothermal Student Serv Student Services Buil ices Building ng Colu Co lumbia, MD mbia, MD •Heatin Heating / Coo g / Cooling ing •Basis For Proposed Design load ba load balance nce •Coo Cooling Tower ing Tower meets peak cooling meets peak cooling loads loads •Reduced Drilling Reduced Drilling Jason Paul Fair Costs Costs Mechanical Option
Howard Comm Howard Commun unity Co ity College llege Design Parameters Design Parameters Mechanical Depth: Geothermal Student Serv Student Services Buil ices Building ng Co Colu lumbia, MD mbia, MD •Bal Baltimore, MD imore, MD •Ground Source Heat Exchanger •Summer Design Temp Summer Design Temperatures eratures •Building Modeling •91 91 o F F DB DBT •77 77 o F F WB WBT •Winter Des nter Design Temperature gn Temperature Jason Paul Fair •13 13 o F Mechanical Option
Howard Comm Howard Commun unity Co ity College llege Modeling Results Modeling Resul Mechanical Depth: Geothermal Student Serv Student Services Buil ices Building ng Co Colu lumbia, MD mbia, MD •Original Original Design vs Design vs Pro Proposed Design osed Design •Ground Source Heat Exchanger •Proposed saves 52.5 Proposed saves 52.5 million Btu per llion Btu per year year •Building Modeling •19,212 ,212 kWh pe kWh per year r year •Reduced peak Reduced peak cooling cooling load by14 to ad by14 tons ns Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege Peak Cooling Peak Coo ing Mechanical Depth: Geothermal Student Serv Student Services Buil ices Building ng Colu Co lumbia, MD mbia, MD •138 boreholes 38 boreholes •Ground Source Heat Exchanger •300 ft deep 300 ft deep •Building Modeling •$17.00 17.00/foot /foot •Well Field Sizing •$703,8 703,800.00 00.00 Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege Peak Heating Peak Heating Mechanical Depth: Geothermal Student Serv Student Services Buil ices Building ng Co Colu lumbia, MD mbia, MD •40 40 borehol boreholes •Ground Source Heat Exchanger •300 ft deep 300 ft deep •Building Modeling •$17.00 17.00/foot /foot •Well Field Sizing •$204,0 204,000.00 00.00 •Additional Additional 270 270 Jason Paul Fair tons Cooling tons Coo ing Mechanical Option
Presentation Overview Howard Comm Howard Commun unity Co ity College llege Student Services Buil Student Serv ices Building ng •Building Summary Co Colu lumbia, MD mbia, MD •Existing Mechanical System •Depth Topic: Proposed Geothermal •Breadth Topic: Constructability /Cost Jason Paul Fair Mechanical Option
Howard Comm Howard Commun unity Co ity College llege Drilling Time Drilling T me Breadth Topic Constructability / Cost Student Serv Student Services Buil ices Building ng Colu Co lumbia, MD mbia, MD •700 ft/day 00 ft/day •Scheduling •2 boreho 2 boreholes /day les /day •4 weeks d 4 weeks drill illing ng •1 week pipi week piping ng connect con ections ons Jason Paul Fair Mechanical Option
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