Assessment & Monitoring Methods Flashcards
7 cards from real EMP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Assessment & Monitoring Methods flashcards as text
An energy manager wants to identify thermal losses in a building envelope. Which assessment tool provides the most direct visualization of heat loss patterns?
Answer: Infrared thermography
Infrared thermography captures thermal images that visually reveal areas of abnormal heat loss or gain through walls, roofs, windows, and other building envelope components.
Which metric is used in ASHRAE Level 2 energy audits to express the energy use of a building relative to its size?
Answer: Energy Use Intensity (EUI)
Energy Use Intensity (EUI) expresses annual energy consumption per square foot of building area, enabling benchmarking against similar buildings and tracking performance over time.
In industrial energy monitoring, what does 'specific energy consumption' (SEC) measure?
Answer: Energy consumed per unit of production output
Specific energy consumption expresses how much energy is required to produce one unit of output (e.g., kWh per ton of product), enabling efficiency tracking independent of production volume.
A facility's energy monitoring system flags an anomaly showing a 40% spike in compressed air system energy at 2 AM when production is halted. What does this most likely indicate?
Answer: Compressed air leaks consuming energy during non-production hours
Significant compressed air energy consumption during non-production hours typically indicates air leaks, as compressors must run continuously to maintain pressure in a leaking system.
When performing an M&V (Measurement and Verification) assessment, what is the primary function of the 'Option A' approach under IPMVP?
Answer: Stipulating some parameters while measuring key performance indicators
IPMVP Option A (Retrofit Isolation – Key Parameter Measurement) measures key performance parameters while stipulating other less significant factors, balancing accuracy with cost-effectiveness.
What is the primary advantage of using automated fault detection and diagnostics (AFDD) in building energy management systems?
Answer: It continuously identifies equipment malfunctions and inefficiencies without manual inspection
AFDD analyzes real-time sensor data to automatically detect equipment faults, performance degradation, and operational anomalies, reducing energy waste and downtime without constant human monitoring.
In energy benchmarking, what is the significance of ENERGY STAR's 1-100 score for commercial buildings?
Answer: It indicates a building's energy efficiency relative to similar buildings nationwide, with 100 being most efficient
The ENERGY STAR 1-100 score places a building's energy performance on a national percentile scale; a score of 75 or above qualifies for ENERGY STAR certification.