Building Energy Efficiency and Sustainability Flashcards

Which ASHRAE Guideline provides standardized high-performance sequences of operation for HVAC systems?

Answer: Guideline 36

Guideline 36 publishes ready-to-use, energy-optimized control sequences such as trim-and-respond resets.

Which ASHRAE standard sets energy requirements specifically for data centers?

Answer: Standard 90.4

Standard 90.4 is the energy standard for data centers, using mechanical and electrical loss components.

A data center uses 1,500 kWh in total while its IT equipment uses 1,000 kWh. What is its Power Usage Effectiveness (PUE)?

Answer: 1.5

PUE equals total facility energy divided by IT energy, so 1,500 / 1,000 = 1.5.

For a natural gas condensing boiler to reach its highest efficiency, the return water temperature should generally be kept below about:

Answer: 130°F

Flue gas water vapor condenses when return water is below about 130°F, which recovers latent heat.

Which ASHRAE standard defines the commissioning process for buildings and systems?

Answer: Standard 202

Standard 202 sets the minimum commissioning process, and Guideline 0 gives supporting detail.

What does a chiller's Integrated Part Load Value (IPLV) represent?

Answer: A weighted average efficiency at 100%, 75%, 50%, and 25% load

IPLV weights efficiency at four part-load points because chillers spend most of their hours below full load.

Which ASHRAE standard has been combined with the International Green Construction Code (IgCC) as its technical content since the 2018 edition?

Answer: Standard 189.1

ASHRAE, ICC, USGBC, and IES combined Standard 189.1 and the IgCC into one document starting in 2018.