CIRO Energy Efficiency & System Optimization 2

Question 1

What is heat recovery in industrial refrigeration?

Accepted Answer

Capturing the heat rejected by the refrigeration system and using it for space heating, water heating, or process heating instead of wasting it

Answer

Recovering refrigerant from old systems

Answer

Reheating food products after refrigeration

Answer

Using solar panels on the refrigeration building

Question 2

How do electronically controlled expansion valves improve efficiency compared to mechanical TXVs?

Accepted Answer

They respond faster and more precisely to changing conditions, maintaining optimal superheat and maximizing evaporator efficiency

Answer

They are cheaper to install

Answer

They eliminate the need for refrigerant

Answer

They only work with new refrigerants

Question 3

What role does proper defrost management play in energy efficiency?

Accepted Answer

Optimizing defrost frequency, duration, and method minimizes heat added to the refrigerated space and reduces compressor run time

Answer

Defrost has no impact on energy use

Answer

More frequent defrosts always save energy

Answer

Defrost should be eliminated entirely

Question 4

What is an energy audit for an industrial refrigeration system?

Accepted Answer

A comprehensive assessment of system performance, energy consumption, and opportunities for efficiency improvements

Answer

An audit of the utility company's billing

Answer

A financial review of refrigerant purchases

Answer

A count of the number of lights in the facility

Question 5

How does parallel compression improve system efficiency?

Accepted Answer

By using multiple compressors that can be staged on and off to match actual load, avoiding the inefficiency of running one large compressor at partial capacity

Answer

Running compressors side by side for noise reduction

Answer

Using two compressors when one would suffice

Answer

Parallel compression reduces system capacity

Question 6

What is the payback period for common energy efficiency upgrades in industrial refrigeration?

Accepted Answer

Typically 1-5 years depending on the measure: VFDs, floating head pressure, and heat recovery offer the fastest returns

Answer

Energy upgrades never pay for themselves

Answer

20+ years for all upgrades

Answer

Payback depends only on electricity prices