Diseno De Sistemas De Agua Helada

Chilled Water Plant Design Guide

energyd e s i g n resources

December 2009

TABLE OF CONTENTS
1. Overview ....................................................................................................................... 1-1 Introduction ................................................................................................................... 1-1 Target Audience............................................................................................................. 1-1 Organization of Material ................................................................................................ 1-2 How to Use the Guide ................................................................................................... 1-3 Chilled Water Plant Loads........................................................................................... 2-1 Understanding Loads and Their Impact on Design ........................................................ 2-1 Peak Loads Overview .............................................................................................. 2-3 Annual Load ProfilesOverview............................................................................... 2-4 Oversizing / Undersizing Considerations ................................................................ 2-4 Determining Peak Loads ................................................................................................ 2-6 Calculations/Simulations ........................................................................................ 2-6 Site Measurements.................................................................................................. 2-7 Rules of Thumb ...................................................................................................... 2-8 Determining Hourly Load Profiles ................................................................................. 2-8 Computer SimulationModels................................................................................. 2-8 Site Measurements ................................................................................................ 2-10 Chilled Water Plant Equipment .................................................................................. 3-1 Introduction................................................................................................................... 3-1 Water Chillers ................................................................................................................ 3-1 Manufacturer Data ................................................................................................. 3-1 Refrigeration Cycle ................................................................................................. 3-2Refrigerants ............................................................................................................. 3-3 Water Chiller Components ............................................................................................ 3-5 Compressors ........................................................................................................... 3-5 Evaporators........................................................................................................... 3-12 Condensers ........................................................................................................... 3-14 Safety Controls, Accessories, and Options ............................................................ 3-15 Performance Characteristics and Efficiency Ratings.............................................. 3-18 Heat Rejection.............................................................................................................. 3-24 Manufacturer Data ............................................................................................... 3-24 Cooling Towers .................................................................................................... 3-24...