UNIVERSITY OF SOUTH AFRICA (UNISA)
College of Agriculture and Environmental Sciences
⋄
HES4804
ASSIGNMENT 01
Semester 1 – 2026
⋄
Module Code: HES4804
Module Name: Environmental Management
Assignment No.: 01
Due Date: June 2026
Semester: Semester 1, 2026
Submitted in partial fulfilment of the requirements for Environmental Management (HES4804)
at the University of South Africa.
,UNISA | HES4804 Assignment 01 – 2026
Question 1: The Industrial Revolution and Environmental Awareness
The Newcomen atmospheric steam engine, introduced in 1712, was a foundational piece of
technology that powered Britain’s early industrialisation, yet it came with serious environ-
mental costs that would only be understood and addressed over time (National Coal Mining
Museum, 2022). This question explores how an engineer in 1860 Birmingham might have re-
designed that machine with environmental foresight, and how the innovations born out of that
era still show up in South African daily life today.
1.1 Environmental Adaptations to the Newcomen Steam Engine (Birmingham, 1860)
By 1860, Birmingham stood at the heart of British industrial production. Engineers working
there would have had access to James Watt’s improvements and the growing body of knowl-
edge about combustion, thermodynamics, and the visible effects of industrial smoke on air
and water quality. The Newcomen engine itself was known to be extraordinarily wasteful:
its thermal efficiency was roughly 1%, meaning that for every 100 kilograms of coal burned,
only about 1 kilogram of energy did useful mechanical work (Digilander Libero, n.d.). Every
stroke of the engine cooled the entire cylinder with water and then reheated it with steam, a
cycle that wasted enormous quantities of fuel and produced correspondingly large volumes of
combustion gases.
Standing in that 1860 context, an environmentally minded engineer would have proposed
several design changes.
Fuel efficiency through cylinder insulation and a separate condenser. The most sig-
nificant environmental gain comes from reducing coal consumption directly. Watt had already
demonstrated that insulating the main cylinder and adding a separate, permanently cold
condenser could reduce fuel use by up to 75% compared with the original Newcomen design
(National Coal Mining Museum, 2022). A Birmingham engineer in 1860 would have recognised
this as an environmental intervention as much as an economic one: less coal burned means less
sulphur dioxide, less carbon dioxide, and less particulate matter released into the air over the
city.
Smoke filtration and chimney design. The combustion of coal produces not just carbon
dioxide but also sulphur compounds and unburned soot particles. By 1860, early chimney and
flue designs were being experimented with to retain some of this particulate matter before it
Page 1 of 12
,UNISA | HES4804 Assignment 01 – 2026
entered the atmosphere (Engineering and Technology History Wiki, 2019). An environmen-
tally aware engineer would have incorporated a longer flue system or an early form of ash trap
to capture fly ash before it settled on surrounding communities.
Closed-loop water management. The Newcomen engine used cold water to condense
steam in the main cylinder, and that water, now heated, was typically discharged into nearby
streams. This raised water temperatures, reduced dissolved oxygen, and disrupted aquatic life.
A redesign could have routed the discharge water through a cooling pond or cistern, allowing
it to be reused in the next cycle. This closed-loop approach would have reduced both water
consumption and thermal pollution to local waterways (National Museums Scotland, 2024).
Fuel source substitution where possible. Coal was the dominant fuel by 1860, but in
some applications, wood gasification or the use of coal gas were being explored as alterna-
tives that burned more completely and produced less visible smoke. An engineer conscious
of the air quality around Birmingham’s densely populated working-class districts might have
specified a gas burner rather than a raw coal fire for smaller engine installations.
Noise and vibration isolation. While not a chemical environmental concern, the New-
comen engine’s slow, heavy reciprocating motion generated significant ground vibration and
mechanical noise. Mounting the engine on timber or rubberised isolation beds would have
reduced the impact on surrounding structures and on the health of workers operating the
machine continuously.
Implementation Insight
The 1860 context matters here. An engineer in Birmingham at that time would
not have used the language of “carbon footprint” or “environmental impact assessment,”
but the practical effects of industrial smoke were visible every day. Fog mixed with coal
smoke created what would later be called smog, and rivers like the Tame ran visibly
discoloured with industrial waste. Reducing fuel consumption was therefore not just
good economics; it was a direct response to a degraded living environment (Engineering
and Technology History Wiki, 2019).
1.2 A South African Day-to-Day Example of Industrial Revolution Innovation
The Industrial Revolution did not stay in Britain. Its technologies spread along trade and
colonial routes, and South Africa became one of the regions where those innovations took root,
particularly after the discovery of diamonds in Kimberley in 1867 and gold on the Witwater-
Page 2 of 12
, UNISA | HES4804 Assignment 01 – 2026
srand in 1886 (South African History Online, 2019).
A clear and concrete day-to-day example is the use of the coal-fired electricity grid managed
by Eskom, South Africa’s national power utility. Eskom’s origins trace directly to industrialisation-
era thinking: the utility was established in 1923 as ESCOM (the Electricity Supply Commis-
sion) in direct response to the demand for electrical power created by deep-level gold mining
on the Witwatersrand (Sperotto, 2015, as cited in Scielo, 2016). The steam turbine technol-
ogy that generates most of South Africa’s electricity today is a direct descendant of the steam
engine principle: water is heated, steam drives a turbine, and mechanical energy is converted
to electrical energy. Every time a South African switches on a light, charges a phone, or uses
a railway commuter service, they are using an energy system whose fundamental engineering
logic was developed during the Industrial Revolution (UNIDO, n.d.).
The Transnet freight railway network offers an equally tangible example. Railways were cen-
tral to the Industrial Revolution as a means of moving coal and manufactured goods efficiently.
In South Africa, railway lines were extended from the Cape coast into the interior specifically
to service the diamond and gold mines, connecting Kimberley to Cape Town and Johannes-
burg to Durban (Wikipedia: Mineral Revolution, 2026). Today, Transnet’s rail lines carry iron
ore, coal, and containers across South Africa, using the same basic principle of steel wheels on
steel rails that was commercialised in industrial Britain.
Implementation Insight
South African relevance. Both Eskom and Transnet are so embedded in South
African daily life that their Industrial Revolution origins are easy to overlook. Load
shedding aside, the fact that a household in Soweto has grid electricity at all is a con-
sequence of engineering innovations that started with Newcomen’s pump and Watt’s
improvements (South African History Online, 2019).
Page 3 of 12
College of Agriculture and Environmental Sciences
⋄
HES4804
ASSIGNMENT 01
Semester 1 – 2026
⋄
Module Code: HES4804
Module Name: Environmental Management
Assignment No.: 01
Due Date: June 2026
Semester: Semester 1, 2026
Submitted in partial fulfilment of the requirements for Environmental Management (HES4804)
at the University of South Africa.
,UNISA | HES4804 Assignment 01 – 2026
Question 1: The Industrial Revolution and Environmental Awareness
The Newcomen atmospheric steam engine, introduced in 1712, was a foundational piece of
technology that powered Britain’s early industrialisation, yet it came with serious environ-
mental costs that would only be understood and addressed over time (National Coal Mining
Museum, 2022). This question explores how an engineer in 1860 Birmingham might have re-
designed that machine with environmental foresight, and how the innovations born out of that
era still show up in South African daily life today.
1.1 Environmental Adaptations to the Newcomen Steam Engine (Birmingham, 1860)
By 1860, Birmingham stood at the heart of British industrial production. Engineers working
there would have had access to James Watt’s improvements and the growing body of knowl-
edge about combustion, thermodynamics, and the visible effects of industrial smoke on air
and water quality. The Newcomen engine itself was known to be extraordinarily wasteful:
its thermal efficiency was roughly 1%, meaning that for every 100 kilograms of coal burned,
only about 1 kilogram of energy did useful mechanical work (Digilander Libero, n.d.). Every
stroke of the engine cooled the entire cylinder with water and then reheated it with steam, a
cycle that wasted enormous quantities of fuel and produced correspondingly large volumes of
combustion gases.
Standing in that 1860 context, an environmentally minded engineer would have proposed
several design changes.
Fuel efficiency through cylinder insulation and a separate condenser. The most sig-
nificant environmental gain comes from reducing coal consumption directly. Watt had already
demonstrated that insulating the main cylinder and adding a separate, permanently cold
condenser could reduce fuel use by up to 75% compared with the original Newcomen design
(National Coal Mining Museum, 2022). A Birmingham engineer in 1860 would have recognised
this as an environmental intervention as much as an economic one: less coal burned means less
sulphur dioxide, less carbon dioxide, and less particulate matter released into the air over the
city.
Smoke filtration and chimney design. The combustion of coal produces not just carbon
dioxide but also sulphur compounds and unburned soot particles. By 1860, early chimney and
flue designs were being experimented with to retain some of this particulate matter before it
Page 1 of 12
,UNISA | HES4804 Assignment 01 – 2026
entered the atmosphere (Engineering and Technology History Wiki, 2019). An environmen-
tally aware engineer would have incorporated a longer flue system or an early form of ash trap
to capture fly ash before it settled on surrounding communities.
Closed-loop water management. The Newcomen engine used cold water to condense
steam in the main cylinder, and that water, now heated, was typically discharged into nearby
streams. This raised water temperatures, reduced dissolved oxygen, and disrupted aquatic life.
A redesign could have routed the discharge water through a cooling pond or cistern, allowing
it to be reused in the next cycle. This closed-loop approach would have reduced both water
consumption and thermal pollution to local waterways (National Museums Scotland, 2024).
Fuel source substitution where possible. Coal was the dominant fuel by 1860, but in
some applications, wood gasification or the use of coal gas were being explored as alterna-
tives that burned more completely and produced less visible smoke. An engineer conscious
of the air quality around Birmingham’s densely populated working-class districts might have
specified a gas burner rather than a raw coal fire for smaller engine installations.
Noise and vibration isolation. While not a chemical environmental concern, the New-
comen engine’s slow, heavy reciprocating motion generated significant ground vibration and
mechanical noise. Mounting the engine on timber or rubberised isolation beds would have
reduced the impact on surrounding structures and on the health of workers operating the
machine continuously.
Implementation Insight
The 1860 context matters here. An engineer in Birmingham at that time would
not have used the language of “carbon footprint” or “environmental impact assessment,”
but the practical effects of industrial smoke were visible every day. Fog mixed with coal
smoke created what would later be called smog, and rivers like the Tame ran visibly
discoloured with industrial waste. Reducing fuel consumption was therefore not just
good economics; it was a direct response to a degraded living environment (Engineering
and Technology History Wiki, 2019).
1.2 A South African Day-to-Day Example of Industrial Revolution Innovation
The Industrial Revolution did not stay in Britain. Its technologies spread along trade and
colonial routes, and South Africa became one of the regions where those innovations took root,
particularly after the discovery of diamonds in Kimberley in 1867 and gold on the Witwater-
Page 2 of 12
, UNISA | HES4804 Assignment 01 – 2026
srand in 1886 (South African History Online, 2019).
A clear and concrete day-to-day example is the use of the coal-fired electricity grid managed
by Eskom, South Africa’s national power utility. Eskom’s origins trace directly to industrialisation-
era thinking: the utility was established in 1923 as ESCOM (the Electricity Supply Commis-
sion) in direct response to the demand for electrical power created by deep-level gold mining
on the Witwatersrand (Sperotto, 2015, as cited in Scielo, 2016). The steam turbine technol-
ogy that generates most of South Africa’s electricity today is a direct descendant of the steam
engine principle: water is heated, steam drives a turbine, and mechanical energy is converted
to electrical energy. Every time a South African switches on a light, charges a phone, or uses
a railway commuter service, they are using an energy system whose fundamental engineering
logic was developed during the Industrial Revolution (UNIDO, n.d.).
The Transnet freight railway network offers an equally tangible example. Railways were cen-
tral to the Industrial Revolution as a means of moving coal and manufactured goods efficiently.
In South Africa, railway lines were extended from the Cape coast into the interior specifically
to service the diamond and gold mines, connecting Kimberley to Cape Town and Johannes-
burg to Durban (Wikipedia: Mineral Revolution, 2026). Today, Transnet’s rail lines carry iron
ore, coal, and containers across South Africa, using the same basic principle of steel wheels on
steel rails that was commercialised in industrial Britain.
Implementation Insight
South African relevance. Both Eskom and Transnet are so embedded in South
African daily life that their Industrial Revolution origins are easy to overlook. Load
shedding aside, the fact that a household in Soweto has grid electricity at all is a con-
sequence of engineering innovations that started with Newcomen’s pump and Watt’s
improvements (South African History Online, 2019).
Page 3 of 12
