Building energy simulation : a workbook using DesignBuilder / Vishal Garg, Jyotirmay Mathur, Surekha Tatali, and Aviruch Bhatia.

Includes bibliographical references and index.

Preface xi Acknowledgements xiii Authors xv Building energy simulation 1 What is needed for energy simulation 2 How simulation software works 3 1. Getting Started with Energy Simulation 1 Tutorial 1.1 Opening and simulating an example file 4 Tutorial 1.2 Creating a single-zone model 16 Tutorial 1.3 Evaluating the impact of building location and orientation 31 Tutorial 1.4 Evaluating the impact of opaque envelope components 41 Tutorial 1.5 Evaluating the impact of WWR and glass type 48 Tutorial 1.6 Evaluating the impact of occupancy density 64 Tutorial 1.7 Evaluating the impact of space activity 67 Tutorial 1.8 Evaluating the impact of lighting and equipment power 75 Tutorial 1.9 Evaluating the impact of daylight controls 78 Tutorial 1.10 Evaluating the impact of setpoint temperature 85 Tutorial 1.11 Evaluating the impact of fresh air supply 88 2. Geometry of Buildings 91 Tutorial 2.1 Defining thermal zoning for a building 92 Tutorial 2.2 Evaluating the effect of a zone multiplier 98 Tutorial 2.3 Evaluating the impact of the aspect ratio 102 Tutorial 2.4 Evaluating the impact of adjacency of the surface 110 3. Material and Construction 115 Tutorial 3.1 Evaluating the effect of lightweight and heavyweight construction 116 Tutorial 3.2 Evaluating the impact of roof insulation 126 Tutorial 3.3 Evaluating the impact of the position of roof insulation 132 Tutorial 3.4 Evaluating the impact of the air gap between roof layers 136 Tutorial 3.5 Evaluating the impact of surface reflectance 140 Tutorial 3.6 Evaluating the impact of roof underdeck radiant barrier 146 Tutorial 3.7 Evaluating the impact of a green roof 150 4. Openings and Shading 155 Tutorial 4.1 Evaluating the impact of window wall ratio and glazing type 156 Tutorial 4.2 Evaluating the impact of overhangs and fins 168 Tutorial 4.3 Evaluating the impact of internal operable shades 178 5. Lighting and Controls 189 Tutorial 5.1 Evaluating the impact of daylighting-based controls 189 Tutorial 5.2 Evaluating the impact of daylight sensor placement 193 6. Heating and Cooling Design 209 Tutorial 6.1 Evaluating the impact of temperature control types 209 Tutorial 6.2 Evaluating the impact of design day selection 222 Tutorial 6.3 Evaluating the impact of the air flow calculation method 229 7. Unitary HVAC Systems 235 Tutorial 7.1 Evaluating the impact of unitary air conditioner COP 235 Tutorial 7.2 Evaluating the impact of the fan efficiency of a unitary air conditioning system 241 Tutorial 7.3 Evaluating the impact of fan pressure rise 247 8. Central HVAC System 253 Tutorial 8.1 Evaluating the impact of air-cooled and water-cooled chillers 253 Tutorial 8.2 Evaluating the impact of variable speed drive (VSD) on a chiller 263 Tutorial 8.3 Evaluating the impact of VSD on a chilled water pump 272 Tutorial 8.4 Evaluating the impact of a cooling tower fan type 276 Tutorial 8.5 Evaluating the impact of condenser water pump with VSD 280 Tutorial 8.6 Evaluating the impact of an air-side economiser 283 Tutorial 8.7 Evaluating the impact of supply air fan operation mode during unoccupied hours 288 Tutorial 8.8 Evaluating the impact of heat recovery between fresh and exhaust air 292 Tutorial 8.9 Evaluating the impact of boiler nominal thermal efficiency 301 9. Simulation Parameters 305 Tutorial 9.1 Evaluating the impact of time steps per hour on run time 306 Tutorial 9.2 Evaluating the impact of the solar distribution algorithm 310 Tutorial 9.3 Evaluating the impact of the solution algorithm 316 Tutorial 9.4 Evaluating the effect of the inside convection algorithm 319 Tutorial 9.5 Evaluating the impact of the shadowing interval 324 10. Natural Ventilation 327 Tutorial 10.1 Evaluating the impact of wind speed on natural ventilation 328 Tutorial 10.2 Evaluating the impact of natural ventilation with constant wind speed and direction 336 Tutorial 10.3 Evaluating the impact of window opening and closing schedule 346 Tutorial 10.4 Evaluating the impact of window opening control based on temperature 349 Tutorial 10.5 Evaluating the impact of window opening area modulation on natural ventilation 360 Tutorial 10.6 Evaluating the impact of mixed mode operation 369 11. Building Energy Code Compliance 381 Tutorial 11.1 Simulating building performance in four orientations 382 Tutorial 11.2 Creating the base case external wall for ASHRAE 90.1-2010 Appendix G 384 Tutorial 11.3 Modelling flush windows for the base case 386 Tutorial 11.4 Selecting HVAC system for the base case 387 Tutorial 11.5 Calculating fan power for the base case 388 Tutorial 11.6 Understanding fan cycling 390 Tutorial 11.7 Specifying room air to supply air temperature difference 390 Tutorial 11.8 Number of chillers in the base case 391 Tutorial 11.9 Defining chilled-water supply temperature reset for the base case 396 Tutorial 11.10 Type and number of boilers for the base case 398 Tutorial 11.11 Defining hot-water supply temperature reset 399 Tutorial 11.12 Hot-water pumps 401 Tutorial 11.13 Defining exhaust air energy recovery parameters 401 Tutorial 11.14 Defining economiser parameters 402 Tutorial 11.15 Finding unmet hours after simulation 403 Tutorial 11.16 Generating the performance rating method compliance report in DesignBuilder 403 Tutorial 11.17 Finding process load for the base case 405 Tutorial 11.18 Getting ASHRAE 62.1 standard summary in DesignBuilder 406 Reference 407 12. Project: Small Office 409 Project goal 409 Overview 409 Climate and location 409 Floor plans 411 Building envelope 413 Internal loads and schedules 414 Mechanical systems 416 13. Project: Single-Family Residence 419 Project goal 419 Overview 419 Climate and location 421 Floor plans 421 Internal loads and schedules 424 Building envelope 431 Mechanical systems 434 IECC 2015 compliance 435 14. Project: Large Office 437 Project goal 437 Overview 437 Climate and location 437 Floor plans 439 Building envelope 441 Internal loads and schedules 441 Mechanical systems 443 Show compliance for ASHRAE 90.1-2010 444 Appendix A: Working of EnergyPlus[™] Simulation 447 Appendix B: Weather Data and Tools 451