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| Section | Weight | Objectives |
|---|---|---|
| Measurement and Verification | 5% | - Baseline development and savings calculation - M&V protocols and standards |
| Lighting Systems | 10% | - Design and control strategies - Daylighting integration - Lighting technologies and efficiency |
| Boiler and Steam Systems | 4–6 | - Operation and efficiency - Maintenance and optimization |
| Energy Audits and Instrumentation | 10% | - Audit levels and methodologies - Data collection and analysis - Energy performance indicators - Measurement tools and instrumentation |
| Codes, Standards and Regulations | 5% | - Sustainability policies and frameworks - Energy efficiency codes and standards - Compliance and reporting requirements |
| Building Automation and Controls | 5% | - Automation and optimization - Building management systems - Control systems and strategies |
| Industrial Systems | 6–8 | - Compressed air, pumping, and drying systems - Process energy efficiency |
| HVAC Systems and Building Envelope | 15% | - Thermal envelope performance - Heating, ventilation and air conditioning - Load calculation and system selection |
| Energy Accounting and Economics | 15% | - Life cycle costing and economic analysis - Energy units and conversions - Time value of money, NPV, IRR, payback analysis - Utility rate structures and tariffs |
| Energy Storage Systems | 3–5 | - Integration and benefits - Storage technologies and applications |
| Operations, Maintenance and Commissioning | 5% | - Commissioning and retro-commissioning - Maintenance best practices |
| Electrical Power Systems and Motors | 15% | - Power factor correction and load management - Motor systems, efficiency and controls - Power distribution and quality |
| Energy Savings Performance Contracting | 5% | - Guaranteed savings and risk allocation - Contract structures and financing |
| Distributed Generation and Renewable Energy | 4–6 | - Combined heat and power (CHP) - Solar, wind, biomass, geothermal - Grid integration and economics |
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NEW QUESTION # 134
In a chilled water thermal energy storage system, chilled water is stored at 4°C and used for supply water.
Chilled water return is 14°C. Calculate the storage capacity required to hold 50 GJ of thermal cooling. (The specific heat of water (C) is 4.2 kJ/kg-°C. Assume no system losses.)
Answer: E
Explanation:
1) Define what is being asked (CEM context)
For a chilled-water thermal energy storage (TES) system, AEE CEM guidance states that storage capacity is determined from:
Where:
* = stored thermal energy
* = mass of water
* = specific heat of water
* = temperature difference between supply and return
This equation is explicitly used in CEM thermal energy storage sizing problems (AEE CEM Body of Knowledge - Cooling Systems & Thermal Storage).
2) Given data
* Required cooling storage:
* Chilled water supply temperature = 4°C
* Chilled water return temperature = 14°C
* Temperature difference:
* Specific heat of water:
* Density of water (CEM standard assumption):
3) Solve for required water mass
4) Convert mass to volume
Using water density:
NEW QUESTION # 135
Which is the best application for variable-speed drives?
Answer: D
NEW QUESTION # 136
A cooling tower delivers water to a chilled-water plant at 21°C. The outside ambient air conditions are 19°C dry bulb, 50% relative humidity. Using the psychrometric chart, what is the approach temperature of the cooling tower outlet water temperature to the ambient air wet-bulb temperature?
SELECT THE CORRECT ANSWER
Answer: C
NEW QUESTION # 137
If a boiler cycles on and off too frequently, what control can you adjust to reduce the number of times a boiler cycles on and off?
Answer: B
NEW QUESTION # 138
An air-conditioning system at full load is rated at 70-kW (thermal cooling) and has a coefficient of performance (COP) of 4.1. What is the electrical load at full load?
Answer: C
NEW QUESTION # 139
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