renewable energy sources Flashcards
What are renewable energy sources?
Sources of energy that are replenished naturally, such as solar, wind, and biomass
Renewable energy is critical for sustainable development and reducing carbon emissions.
What is water conservation?
The practice of using water efficiently to reduce unnecessary water usage
It includes methods like rainwater harvesting and greywater recycling.
What is a dual low flush WC?
A toilet designed to use less water per flush, with options for different flush volumes
It helps in conserving water in households.
What is rainwater harvesting?
The collection and storage of rainwater for reuse before it reaches the ground
It typically involves systems like collection tanks and filters.
What percentage of all piped rainwater from the built environment is recyclable?
40%
This highlights the potential for water reuse in urban settings.
How much water does an average person use per day?
150 litres
This consumption varies widely depending on lifestyle and location.
What components are involved in simple rainwater harvesting systems?
Collection tank, particulate filters, pump, solenoid
These systems enable replenishment from mains when natural runoff is low.
What is greywater harvesting?
The collection and reuse of wastewater from sinks, baths, and showers
It aims to reduce freshwater consumption by recycling used water.
What is grey water?
Waste runoff water from sinks, baths, and showers
It can be treated and reused for non-potable applications.
What are the main legislative controls for wastewater management?
Waste fitting regulations, building regulations
These regulations ensure safe and efficient water management practices.
What is SUDS?
Sustainable Urban Drainage Systems
They manage surface water runoff and promote environmental sustainability.
What are some techniques used in SUDS?
- Use of porous systems
- Filter drains
- Swales and berms
- Basins and ponds
- Cage tubrosizer
These techniques help to manage stormwater effectively.
What are the added benefits of SUDS?
- Visual amenity
- Reduced construction costs
- Easier compliance with runoff rates
- Avoidance of expensive stormwater connections
SUDS enhance the ecological value of developments.
What is biomass?
Organic material that can be processed to produce solid or liquid energy
It is considered virtually carbon neutral.
What are biofuels?
Diesel or ethanol derived from plant matter or food stocks
They are produced through chemical or biological processes.
What is the lifespan of biomass systems compared to conventional fuels?
Around 25 years
They are cost-effective and will become more advantageous as fossil fuel prices rise.
What is micro-hydro electricity?
A small-scale generation of electricity using flowing water
It is related to hydroelectric power but on a reduced scale.
What are the ecological impacts to consider for micro-hydro systems?
Visual and ecological impacts
These impacts must be evaluated during project planning.
What is the main challenge for wave and tidal energy?
High capital risks and location restrictions
These factors limit the widespread adoption of marine energy technologies.
What factors affect the output of tidal power?
- Wave height
- Tidal range
- Moon phases
- Choice of technology
These elements influence the efficiency and feasibility of tidal energy projects.
