Sustainable Energy: Engineering Fundamentals and Applications Study Notes

SUSTAINABLE ENERGY: ENGINEERING FUNDAMENTALS AND APPLICATIONS

INTRODUCTION

• Global Population Statistics:

  • 1800: Population was 1 billion.

  • 1927: Doubled to 2 billion in 127 years.

  • 1974: Doubled again to 4 billion in just 47 years.

• Factors Necessitating Understanding of Sustainability:

  • Changes in living standards.

  • Evolving consumption habits.

  • Urbanization.

  • Industrialization growth.

• OECD's Definition of Sustainability:

  • (a) Usage of the biosphere by current generations while ensuring its yield potential for future generations.

  • (b) Non-declining economic growth trends (sustainable development), which can be diminished by natural resource consumption and environmental degradation.

GLOBAL OVERVIEW

• Sustainable Development Goals (SDGs):

  • 17 global goals identified by United Nations General Assembly addressing:

  • Economic instabilities.

  • Recession issues.

  • Human health problems.

  • Poverty.

  • Unequal educational opportunities.

  • Climate change impacts.

  • Access to clean water and energy.

INDICATORS AND MEASUREMENT OF SUSTAINABILITY

Sustainability Indicators

• Example Sources: United Nations, World Bank, Environmental Protection Agency (EPA).

  • Multiple indicator sets used in sustainability assessment.

Measurement Methods

• Significance and Challenges:

  • The concept of sustainability and sustainable development is increasingly recognized.

  • Measurement challenges necessitate the development of reliable quantification methods.

• Four Sets of Indicators for Sustainable Development Measurement:

  1. Ecological Footprinting: Measures required agricultural land area and water needed to sustain population activities.

  2. Capital Approach.

  3. Green National Net Product (GNNP).

  4. Genuine Savings.

Ecological Footprint Calculation

• Total ecological footprint formula: $EFTOT = EFDIR + EFINDIR$ (Equation 2.1)

  • Where:

  • EFDIR: Direct land use for raising crops.

  • EFINDIR: Indirect land uses related to production inputs.

  • Note: EFDIR is calculated as:
    $EFDIR = Q imes YW imes EQF_{crop}$ (Equation 2.2)

  • Where:

  • Q = amount of crop harvested (in tonnes).

  • YW = yield of production (in tonnes).

  • EQF = equivalence factor for land-use conversion.

Indirect Land Use Calculation

• EFINDIR Definition:

  • Takes into account all indirect land uses from inputs in crop production.

  • Expressed as:
    $EFINDIR = ext{sum from i=1 to n}(EF_i)$ (Equation 2.3)

  • Where:

  • $EF_i$: Footprint from each input in crop production.

• Formula Breakdown:

  • Calculated as:
    $EFi = ext{sum from j=1 to 6}(RAi imes YFj imes EQFj)$ (Equation 2.4)

  • Definitions:

  • RA: Area required in hectares (ratio of input quantity to yield).

  • i = input utilized.

  • j = land-use types.

  • $YF_j$: Yield factor per land type.

  • $EQF_j$: Equivalence factor per land type.

Human Development Index (HDI)

• Launched by UNDP in 1990 as a human development measurement index.

• Factors Considered:

  • Health (life expectancy).

  • Education (expected and mean years of schooling).

  • Standard of living (GNI per capita).

• Formula for Dimension Indices:
  $I = \frac{(Actual value - Minimum value)}{(Maximum value - Minimum value)}$ (Equation 2.6)

• HDI Calculation:

  • Geometric mean of the three indices:
    $HDI = 3\sqrt[3]{I<em>{health} \times I</em>{education} \times I_{income}}$ (Equation 2.7)

Example: Green National Net Product (GNNP)

• Scenario for Algeria's Economic Indicators:

  • Depreciation: 10%

  • Resource Stock Changes: 27.1%

  • Environmental Degradation: 4.2%

• GNNP Calculation Based on GNP:

  • Reported GNP: $164.8 billion

  • GNNP Calculation:
    $GNNP = GNP - (0.1 \times GNP + 0.271 \times GNP + 0.042 \times GNP)$
    $GNNP = 0.587 \times GNP$

  • Result:
    $GNNP = 0.587 \times 164.8 \text{ billion} = 96.7 \text{ billion}$

• Important Note:

  • Differentiate between GNP and GDP when sourcing economic data.

SUSTAINABILITY OF ENERGY RESOURCES

Fossil Energy Resources

• Current reserve estimates and their remaining years highlighted.

Non-Fossil Energy Resources

• Importance of alternatives due to fossil fuel depletion and related concerns:

  • Focus on nuclear energy (4.4%), hydroelectric (6.8%), and other renewable sources (4%: solar, wind, geothermal, tidal, biomass).

• Sustainability Characteristics:

  • Nuclear energy: Controversial.

  • Hydropower: Relies on water cycle driven by the sun.

  • Solar energy: Dependent on solar irradiation; wind energy, on atmospheric pressure differences; geothermal, on Earth's thermal energy; tidal, on gravitational forces; biomass, via photosynthesis.

  • These sources are sustainable as they can naturally replenish over time.

SUMMARY

• Chapter Focus:

  • Understanding of sustainability and development.

  • Discussion of Sustainable Development Goals (SDGs).

  • Importance of defining and measuring sustainability indicators.

• Three Pillars of Sustainability:

  • Social, Economic, and Environmental discussed.

• Assessment Approaches:

  • Covered ecological footprinting (EF), green national net product (GNNP), HDI, and SHDI.

• Approach Variability:

  • Due to the intangible nature of sustainability, multiple assessment methods can be utilized. - Reliable results reveal strengths and weaknesses in sustainability indicator areas.