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Course Outline
Day 1
Welcome and Introduction
Design Considerations for Energy Efficiency
- Review of systems: single-stage, DX, flooded, overfed, and multi-stage systems
- Energy efficiency considerations for industrial refrigeration systems
Load Calculations and Psychrometrics
- Temperature requirements
- Load types: envelope, product, internal, equipment, infiltration
- Psychrometrics review
- Sensible and latent loads
- Infiltration loads: theory vs. real-world
- Rules-of-thumb
Load Calculation Workshop Load Calculation Workshop (continues) Evaporators
- Types
- Performance characteristics
- Manufacturer's rating methods
- Selection process
- Energy efficiency considerations
- Variable speed drive fans
Assign Homework – Class Design Project
- Preliminary refrigeration system layouts
- Load calculations
- Evaporator selection/layout
Adjourn to Work on Class Project
Day 2
Homework Review Valves and Valve Selection
- Valve types and uses
- Actuating methods (direct-acting, pilot-operated)
- Installation considerations
- Typical valve groups
- Safety considerations
- Energy efficiency considerations
Condensers
- Performance characteristics
- Sizing considerations
- Selection
- Fan alternatives and methods of control
- Energy efficiency considerations
Condenser Selection Workshop
- Types: high-pressure receiver, thermosiphon, low-pressure accumulator, flash intercooler
- Configurations: horizontal or vertical
- Ratings
- Proper practices for system integration
- Knock-out velocity
- Down-comer sizing
- Refrigerant level control (floats, capacitance probes)
Vessel Sizing/Selection Workshop
Assign Homework
- Evaporator valve selection and valve train layout
Adjourn to Work on Class Project
Day 3
Homework Review Liquid Refrigerant Pumps
- Pump types and performance curves
- Net positive suction head: required and available
- Pump selection
- Energy efficiency considerations
Compressors
- Compressor ratings
- Full-load and part-load operation
- Oil cooler heat rejection methods (screw compressors)
- Volume ratio (fixed and variable)
- High stage and booster selection
- Energy efficiency considerations
Compressors (continued)
Class Design Project Assign Homework
- Select compressors
- Select condensers
Adjourn to Work on Class Design Project
Day 4
Homework Review Refrigerant Piping
- Sizing vapor lines (suction, discharge, hot gas)
- Liquid line sizing
- Wet return line sizing
- Piping practices to minimize potential for hydraulic hammer
- Riser pipe sizing practices
- Energy efficiency considerations
Refrigerant Piping Workshop Heat Recovery Opportunities
- Assessing the potential for heat recovery in ammonia systems
- Heat recovery options Design Project
Assign Homework
- Class design project
Adjourn to Work on Class Design Project
Day 5
Homework Review
Finalize Design Project
Design Project Presentations
Question/Answer Session