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SOLA5057 > Final Exam SOLA5057 > Flashcards

Final Exam SOLA5057 Flashcards

1
Q

Lux

A

Light intensity at a point source (lx = lm/m^2)

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2
Q

Lumens

A

Measure of total visible light output (lm)

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3
Q

Luminous Efficacy

A

Visible light output per unit power (lm/W)

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4
Q

Types of lights

A

LED, Fluorescent, Halogen, Incandescent, CFL

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5
Q

Negative impacts of current transport

A
  • GHG emissions
  • Oil depletion
  • Air pollution
  • Congestion
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6
Q

Ratings

A
  • MEPS (minimum energy performance standard)
  • Star ratings
  • NABERS (national built environment rating system)
  • NatHERS (national home energy rating scheme)
  • LEED (leadership in energy and environmental design)
  • Green Star
  • BASIX (building sustainability index)
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7
Q

Types of A/C systems

A
  • Vapour compression refrigeration
  • Direct evaporative cooling
  • Indirect evaporative cooling
  • Desiccant cooling
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8
Q

Types of electric motors

A
  • DC
  • Synchronous
  • Induction
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9
Q

Motor efficiency measures

A
  • Reassess need
  • Operating time optimisation
  • EMS (Energy Management System)
  • Reducing over sizing
  • VSD (variable speed drive)
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10
Q

Properties of Steam

A
  • Transfers heat at constant temp
  • High energy density per unit volume
  • Temperature is dependant on pressure
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11
Q

Compression

A
  • Adiabatic/Isentropic
  • > no heat energy in or out
  • > PV^k = constant
  • Isothermal
  • > constant temp due to cooling, PV = constant
  • Polytropic
    -> some cooling but not enough for constant temp
    PV^n = constant, n = Cp/Cv
  • Two-stage
  • > Px = sqrt(P1P2)
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12
Q

Work Required for compression

A

Isentropic > Polytropic > Isothermal

Any removal of heat from compression proccess lowers the mechanical work required to compress the air

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13
Q

Furnace Efficiency

A

Optimising combustion

  • too little air -> incomplete compustion
  • > too much air -> heat loss

Other efficiency measures
-> rescheduling, maintenance, insulation, fuel switching, waste heat recovery

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14
Q

3 separate energy audit standards

A
  • Commercial buildings
  • Industrial and related activities
  • Transport related activities
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15
Q

Type 1 Audit

A

Basic Energy Audit

  • All forms of energy that use at least 20% of total energy
  • provide broad overview of energy usage
  • roughly identify opportunities for significant energy and cost savings
  • payback times < 2yrs
  • summary table of savings opportunities
  • identify areas where more detailed audit would be valuable
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16
Q

Type II Audit

A

Detailed Energy Audit

  • Most commonly applicable
  • All forms of usage with at least 10% of total
  • Other energy grouped as “Other”
  • Detailed understanding of energy usage
  • Quantify opportunity for energy and cost savings
  • Payback times less than 4yrs
  • Comprehensive set of recommendations
  • moderate accuracy cost estimates and energy balances
  • Identify where Type III is useful
17
Q

Type III Audit

A

Precision Subsystem Audit

  • highly accurate understanding of the energy usage and savings opportunities of a system
  • Comprehensive understanding of all energy usage
  • precisely quantify cost and energy savings
  • Taking comprehensive measurements
  • Comprehensive set of recommendations
  • Energy balances and costing for improvement
  • Consider non-energy benefits of changes
18
Q

Green Star

  • how’s it rated?
  • 9 categories
A

(0-6 Stars)

  • Management
  • Indoor environment quality
  • Energy
  • Transport
  • Water
  • Materials
  • Land Use and Ecology
  • Emissions at point of use
  • Innovation
19
Q

NABERS

  • name (hows it rated?)
  • rating categories
  • building types
A

National Australian Built Environment Rating System (0-6 Stars)

Energy, Water, Waste

Offices, Hotels, Shopping Centres, Data Centres, Apartment blocks

20
Q

LEED

  • name
  • rating levels
  • ratings for:
  • criteria
A

Leadership in Energy and Environmental Design

platinum, gold, silver, certified, registered

  • Building Design and Development
  • Interior Design
  • Operation and Maintenance
  • Homes and Maintenance
  • Location and Tranpsort
  • Sustainability of site
  • Water Efficiency
  • Energy and Atmosphere
  • Materials and resources
  • Indoor Environmental quality
  • Innovation and regional priorities
21
Q

NatHERS

  • name
  • how’s it rated
  • criteria
A

National Home Energy Rating Scheme

0-10 Stars

Energy required to heat and cool a house

22
Q

BASIX

  • name
  • description
A

Building sustainability index

Targets for water and energy, new homes or major rennovations, targets increase over time

SOLA5057 (3 decks)

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