Sustainable Energy and the Environment | COMPLETE QUESTIONS AND
ANSWERS | 100% RATED CORRECT | 2024-2025 LATEST UPDATED
Properties of H2-Diesel fuelling? - (answers)Low NOx, PM, Carbon
Increased thermal efficiency
Can cause knocking
High local in-cyl temps can cause NOx formation
Properties of SI pure H2 engines - (answers)0 carbon emmissions
more energy content
can run ultra lean
higher flame speed-> increased thermal efficiency
你是想要一篇“眼睛容易阅读
highly susceptible to knocking
的”中文文章
NOx formation from in cyl temps
larger volume needed for fuel
Properties of h2- gasoline dual fuelling - (answers)less startup emissions
better efficiency
smooth and quiet
lower emissions
potential for increased NOx
What is syn-gas? - (answers)Gas mixture (h2 and CO/CO2) that provides building block for
many chemicals, can be done through reforming hydrocarbon
, Properties of combined cycle where the exhaust products of the gas power cycle are used to
generate steam for driving a steam turbine - (answers)advantage that the gas and steam turbine
cycles can run independently from each other particularly if the steam generator is equipped with
fuel burner
lower efficiency
Properties of where the exhaust product of the steam boiler is used to drive the gas turbine -
(answers)higher efficiency
needs to both be ran together
What are some typical CHP sectors and their specific applications? - (answers)Industrial:
Chemical, refineries, food and drink
Commercial: swimming pools, hotels, water treatment, universities, hospitals, flats
Domestic: heat networks from power plants for housing
你是想要一篇“眼睛容易阅读
Most common prime mover for industrial CHP units? - (answers)Steam
的”中文文章
What is absorption cooling? - (answers)Liquid chemicals used to drive refrigerant (e.g
water/lithium bromide)
Needs circulating pump - electrical power consumption
What is adsorption cooling? - (answers)Solid chemicals used to drive refrigerant (e.g silica gel)
Needs complex valve system
How do you identify ΔT terms in heat exchangers? - (answers)Across length (x) of HE, each ΔT
will be adjacent temps of hot and cold, at either side of the HE
What is effectiveness? - (answers)Ratio of actual heat transfer to maximum possible heat transfer
ANSWERS | 100% RATED CORRECT | 2024-2025 LATEST UPDATED
Properties of H2-Diesel fuelling? - (answers)Low NOx, PM, Carbon
Increased thermal efficiency
Can cause knocking
High local in-cyl temps can cause NOx formation
Properties of SI pure H2 engines - (answers)0 carbon emmissions
more energy content
can run ultra lean
higher flame speed-> increased thermal efficiency
你是想要一篇“眼睛容易阅读
highly susceptible to knocking
的”中文文章
NOx formation from in cyl temps
larger volume needed for fuel
Properties of h2- gasoline dual fuelling - (answers)less startup emissions
better efficiency
smooth and quiet
lower emissions
potential for increased NOx
What is syn-gas? - (answers)Gas mixture (h2 and CO/CO2) that provides building block for
many chemicals, can be done through reforming hydrocarbon
, Properties of combined cycle where the exhaust products of the gas power cycle are used to
generate steam for driving a steam turbine - (answers)advantage that the gas and steam turbine
cycles can run independently from each other particularly if the steam generator is equipped with
fuel burner
lower efficiency
Properties of where the exhaust product of the steam boiler is used to drive the gas turbine -
(answers)higher efficiency
needs to both be ran together
What are some typical CHP sectors and their specific applications? - (answers)Industrial:
Chemical, refineries, food and drink
Commercial: swimming pools, hotels, water treatment, universities, hospitals, flats
Domestic: heat networks from power plants for housing
你是想要一篇“眼睛容易阅读
Most common prime mover for industrial CHP units? - (answers)Steam
的”中文文章
What is absorption cooling? - (answers)Liquid chemicals used to drive refrigerant (e.g
water/lithium bromide)
Needs circulating pump - electrical power consumption
What is adsorption cooling? - (answers)Solid chemicals used to drive refrigerant (e.g silica gel)
Needs complex valve system
How do you identify ΔT terms in heat exchangers? - (answers)Across length (x) of HE, each ΔT
will be adjacent temps of hot and cold, at either side of the HE
What is effectiveness? - (answers)Ratio of actual heat transfer to maximum possible heat transfer
