Certified Energy Auditor Certification Renewable Energy Systems 3

Question 1

What is the Coefficient of Performance (COP) of a ground source heat pump (GSHP) heating system?

Accepted Answer

The ratio of heat output delivered to electrical energy consumed

Answer

COP is the ratio of useful heat output to electrical energy consumed; GSHPs typically achieve heating COPs of 3–5, delivering 3–5 units of heat energy per unit of electricity input.

Question 2

What is Levelized Cost of Energy (LCOE)?

Accepted Answer

Total lifecycle costs of an energy system divided by its total lifetime energy production

Answer

LCOE represents all costs (capital, O&M, financing) over the system's useful life divided by total lifetime energy produced, providing a standardized metric for comparing different generation technologies.

Question 3

Which ASHRAE standard provides guidelines specifically for energy audits of commercial buildings?

Accepted Answer

ASHRAE Standard 211

Answer

ASHRAE Standard 211, 'Standard for Commercial Building Energy Audits,' defines the scope, deliverables, and procedures for Level 1, 2, and 3 energy audits of commercial buildings.

Question 4

When evaluating a small wind turbine for a facility, what is the generally accepted minimum average annual wind speed for a viable installation?

Accepted Answer

5 m/s (11.2 mph)

Answer

An average annual wind speed of approximately 5 m/s (about 11 mph) is the generally accepted minimum threshold for a cost-effective small wind turbine installation.

Question 5

How does high moisture content affect biomass fuel used in an energy system?

Accepted Answer

It reduces the effective heating value and lowers combustion efficiency

Answer

High moisture content in biomass fuel reduces its effective heating value because energy is consumed evaporating the water, which lowers combustion efficiency and increases the volume of fuel needed.

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Renewable Energy Systems 3