Science

List 3 advantages of solar thermal
it's renewable, its cheaper and it uses a feed in tariff
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List 5 disadvantages of solar thermal
Only available during winter, subject to the climatic changes, dependant on geographical location, energy conversion rates are low, high capital cost
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What are the planning permissions for a ground source heat pump?
there aren't any
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List 6 advantages of ground source heat pumps
quick capital recovery and reduced running costs and renewable and environmentally friendly and inversion cooling for summer cooling and reduced CO2
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List 3 disadvantages of ground source heat pumps
expensive and if it's designed badly it can be a big problem and thorough understanding of the movement of the heating is required for it to be effective
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What are the planning permission requirements for air source heat pumps?
there aren't any
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list 6 advantages of air source heat pumps
it uses between 25% and 33% of the normal electricity required and it can be used to heat up water or air and no need for LPG and can be swiched to cool in summer and can provide water up to 75C and it has few moving parts
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list 6 disadvantages of air source heat pumps
it requires electricity and external space is needed and it's expensive and they can frost up and less efficient when cooler and retrofitting may require considerable work
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How can biomass be considered a sustainable energy source?
Trees need to be planted to replace those used
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it is said that biomass is 'virtually carbon neutral'. describe briefly what this means and why biomass is not carbon neutral
it can't be carbon neutral because it's burning would release carbon
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list the approved documents of the building regulations that are applicable to systems
F L J G and P
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list 6 advantages of biomass
It's a sustainable fuel source, it's virtually carbon neutral, it produces very little smoke, it uses up waste wood, it's less susceptible to price increases and reduces the carbon dioxide output by around 9.5 tonnes per annum
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list 7 disadvantages of biomass
the boiler needs more space, only a small number can be used in a smokeless area, fuel costs can be similar to gas, initial costs are high, fuel needs to be kept dry and it's more labour intensive and you'll need a reliable supply of fuel
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What are the planning requirements for solar photovoltaic systems
you don't need planning permission
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What is the optimum angle and orientation for installing solar photovoltaic systems
the optimum angle is 30' and the orientation is south
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What is the purpose of the inverter in a solar PV system
it changes D.C. to A.C.
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list six advantages of solar PV systems
benefit from the government feed in tariff, the tariff is guaranteed for 20 years, it generates power even on cloudy days, carbon emissions can be reduced to up to 1 ton per annum, it protects against rising energy prices and little maintenance
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list 3 disadvantages of solar PV systems
a large amount of unshaded roof is required, panels degrade overtime and replace the invertor every 10 years (not essential)
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do micro wind systems have planning requirements
it may be permitted development, 5 meters away from neighbors fence
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List the two main types of micro wind turbine arrangement
pole mounted and building mounted
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what is the purpose of an invertor in a micro wind system?
changes D.C. to A.C.
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List 7 advantages of a micro wind system
wind is free, benefit from the governments feed in tariff, feed in tariff is 20 years guranteed, protects against energy prices, it doesn't produce green house gasses, a small plot of land is needed, they can produce their own electrical supply.
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list 4 disadvantages of micro wind systems
the strength of the wind is not constant, it can be noisy, pollution is produced during the manufacturing process and the invertor can be replaced every 10 years (not essential)
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What are the planning requirements for building micro-hydro systems
it requires planning and an abstraction license
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What is the purpose of the "forebay tank" in a micro-hydro system
to slow down the water so the suspended particles can settle out
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list the 6 advantages of micro-hydro systems
efficient energy source, can generate 24 hours a day, reliable electrical source, will get payments for the feed in tariff, hydroelectricity is green and no reservoir is required
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list 5 disadvantages of micro-hydro systems
large intial capital outlay, suitable site characteristics required, energy expansion not possible, low power in the summer months and it has environmental impacts
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what are the planning requirements for micro-CHP system
planning permission is not normally needed
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list 4 technologies that can be used for micro-CHP
stirling engine, rankine engine, internal combustion engines and fuel cells
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list 5 advantages of micro-CHP systems
not alot of waste, saves carbon dioxide, elegible for feed in tariffs, replace boiler with ease, costs are similar to a boiler
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list 5 disadvantages of micro-CHP systems
it's still in the 'early adapters' phase, noise pollution, high payback times, not completely renewable, seasonal variations
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what are the planning requirements for rain water harvesting systems
does not normally need planning permission
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what is the purpose of the calming inlet on a rainwater harvesting systems
huge in-rushes of water
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when a rainwater harvesting or greywater reuse system has a mains water back-up, why is it necessary for there to be an AA air gap at the mains water inlet
this is a requirement of water regulations to provide back flow protection
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list 5 advantages of rain water harvesting systems
it saves money, reduces flooding risks, gains eco-homes rating points for your property, good for your garden, provides drinking water for live stock
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list 5 disadvantages of rain water harvesting systems
vulnerable water quality, unpredictable rainfall, requires seperate pipework to be installed
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list four advantages of greywater reuse
conserves whole some water, indirectly reduces energy consuption, a wide range of system options exist and grey water is free
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list four disadvantages of greywater reuse
payback periods can be long, not always straight forward, there is a risk of contamination, only certain types of outlets and appliances can be supplied using greywater
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what is greywater used for?
Greywater is gently used water from your bathroom sinks, showers, tubs, and washing machines.
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what is the wind speed of turbines?
15mph or 0.04m/s
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what does a rectifier do?
changes A.C. to D.C.
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what does wc stand for?
water closet
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what are the dimentions of a solar panel?
1.5m x 2m
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How much ASHP space is required
5 bedroom max
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how fast are the 1 meters, 2 meters and 3 meters
6.28m/s, 12.6m/s and 18.8m/s
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the generator
750-1500rpm or 12.5rp/s
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Other cards in this set

Card 2

Front

List 5 disadvantages of solar thermal

Back

Only available during winter, subject to the climatic changes, dependant on geographical location, energy conversion rates are low, high capital cost

Card 3

Front

What are the planning permissions for a ground source heat pump?

Back

Preview of the front of card 3

Card 4

Front

List 6 advantages of ground source heat pumps

Back

Preview of the front of card 4

Card 5

Front

List 3 disadvantages of ground source heat pumps

Back

Preview of the front of card 5
View more cards

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