FINAL REPORT Mechanical Systems Re-Design and Breadth Topics Northfield Mental Healthcare Center Northfield, Ohio Ji Won Park Mechanical Option Faculty Consultant: Dr. Stephen Treado Date revised and submitted: April, 3rd, 2013 Final Report Northfield Mental Healthcare Center Dr. Stephen Treado Ji Won Park Mechanical Option Spring 2013 TABLE OF CONTENTS ACKNOWLEDGEMENTS ........................................................................................................................................ 6 EXECUTIVE SUMMARY .......................................................................................................................................... 8 SECTION ONE. PROJECT BACKGROUND .......................................................................................................... 9 1.1 Project Background ................................................................................................................................... 9 1.2 Existing Mechanical System Summary .................................................................................................. 9 1.3 Energy modeling - Input ........................................................................................................................ 12 1.3.1 Design Condition ............................................................................................................................... 13 1.3.2 Model Design ...................................................................................................................................... 13 1.3.3 Lighting and Equipment Electrical Load Assumptions................................................................ 14 1.3.4 Occupancy Assumptions .................................................................................................................. 15 1.3.5 Airflow Assumptions ........................................................................................................................ 16 1.3.6 Construction of Building Envelope ................................................................................................. 16 1.3.7 Designed Temperature Control ....................................................................................................... 17 1.4 Energy Modeling - Output ..................................................................................................................... 18 1.4.1 Cooling, Heating, and Ventilation Load ......................................................................................... 18 1.4.2 Domestic Hot and Cold Water Load ............................................................................................... 19 1.5 Energy Consumption .............................................................................................................................. 20 1.6 Emission ................................................................................................................................................... 23 1.7 LEED Analysis ......................................................................................................................................... 23 1.7.1 Energy and Atmosphere ................................................................................................................... 24 1.7.2 Indoor Environmental Quality ......................................................................................................... 25 1.8 Overall Evaluation Summary ................................................................................................................ 27 SECTION TWO. MECHANICAL DEPTH ............................................................................................................ 29 2.1 Proposed Mechanical Redesign............................................................................................................ 29 1 | P a g e Final Report Northfield Mental Healthcare Center Dr. Stephen Treado Ji Won Park Mechanical Option Spring 2013 2.2 ALTERNATIVE 1: Cogeneration ......................................................................................................... 30 2.2.1 Cogeneration – Background Information .................................................................................. 30 2.2.2 Cogeneration – CHP System Internal Components Selection ................................................. 31 2.2.3 Cogeneration – CHP System Module Selection ........................................................................ 33 2.2.4 Cogeneration – CHP System Simple Payback Calculation ...................................................... 35 2.2.5 Cogeneration – CHP System Energy Saving Analysis ............................................................. 36 2.3 ALTERNATIVE 2: Tri-generation ........................................................................................................ 39 2.3.1 Tri-Generation – Background Information ................................................................................ 39 2.3.2 Tri-Generation – Cooling System Design ................................................................................... 39 2.3.3 Tri-Generation – Absorption Chiller Basic Theory ................................................................... 41 2.3.3 Tri-Generation – CHP System Energy Saving Analysis ........................................................... 42 2.4 Emission .................................................................................................................................................. 45 2.3 Overall Evaluation ................................................................................................................................. 46 SECTION THREE. ACOUSTICAL BREADTH ..................................................................................................... 47 SECTION FOUR. ELECTRICAL DEPTH .............................................................................................................. 52 CONCLUSION .......................................................................................................................................................... 55 BIBLIOGRAPHY ....................................................................................................................................................... 57 APPENDIX ................................................................................................................................................................ 59 Appendix A ........................................................................................................................................................... 59 Appendix B ........................................................................................................................................................... 63 Appendix C ........................................................................................................................................................... 67 Appendix D ........................................................................................................................................................... 69 Appendix E ........................................................................................................................................................... 77 2 | P a g e Final Report Northfield Mental Healthcare Center Dr. Stephen Treado Ji Won Park Mechanical Option Spring 2013 LIST OF FIGURES Figure 1: Ventilation Control by DDC-VAV Terminals ...................................................................................... 10 Figure 2: Existing Heating and Cooling System ................................................................................................... 12 Figure 3: TRACE Energy Model Zoning ............................................................................................................... 14 Figure 4: Electricity Usage Breakdown .................................................................................................................. 22 Figure 5: Natural Gas Usage Breakdown .............................................................................................................. 22 Figure 6: Construction Cost per Square Foot for 4 to 8 Story Hospital ............................................................. 28 Figure 7: CHP VS. SHP ............................................................................................................................................ 30 Figure 8: Internal Structure of Selected CHP Module ......................................................................................... 35 Figure 9: Cogeneration - CHP System Coordination with Existing Heating System. ..................................... 37 Figure 10: Single Stage Absorption Chiller System .............................................................................................. 41 Figure 11: Tri-Generation - CHP System Coordination with Existing Heating System ................................. 43 Figure 12: CHP Module Location ........................................................................................................................... 48 Figure 13: Noise Sources .......................................................................................................................................... 48 Figure 14: Existing Electrical Schematic ................................................................................................................ 52 Figure 15: Existing