首页
登录
职称英语
SECTION 4 Questions 31-40Questions 31-35Complete the information in the table.
SECTION 4 Questions 31-40Questions 31-35Complete the information in the table.
游客
2025-02-14
5
管理
问题
SECTION 4 Questions 31-40
Questions 31-35
Complete the information in the table.
[br]
Lecturer: Welcome to this lecture on making houses greener. Let’s get
right into things and look at insulation first of all. Around 40% of the heat
that is lost from a home is lost through walls and the roof. The rest is lost
through the floor and openings. This figure can be significantly reduced
through the installation of simple loft insulation, which will cost between
£130-200 to install and save around
£150
a year in energy bills. Cavity wall Q31
insulation costs from around
£135
to install and can save around £100 a year. Q32
Windows can be insulated by installing double glazing to reduce heat loss
through windows, although wooden frames are more preferential from an environmental
perspective than PVC.
Now, lighting accounts for some 15% of an electricity bill. As each
energy-saving
light bulb
saves some £7 a year, the benefits are potentially Q33
significant. On an even simpler level, ensuring that the new appliances you
install are approved by the Environmental Standards Authority means that,
for example, on a fridge, you can reduce its energy consumption by two
thirds—saving you £35 a year. In particularly dark areas of the upper storeys
of homes, a light-pipe might be an effective alternative to constant artificial
lighting—light is captured from the roof and channelled down a mirrored
tube. They cost between
£200-700
, depending on size and distance from Q34
roof.
As regards heating water, a high-efficiency condensing boiler—particularly
one that uses weather compensation control—will save you around
£180
a year, while simply adding a jacket and lagging to the hot water cylinder Q35
and pipes will cover its outlay in a year.
Now, let’s look at energy generation. People are becoming increasingly
interested in generating electricity at home. PV cells are perhaps the best
known form of renewable energy and operate by turning solar radiation into
electricity. The average UK home could generate around half of its own electricity
through this method,
providing it is used efficiently and the home has Q36
a large south-facing roof
. The greater the intensity of the sunlight, the greater
the amount of electricity produced. Payback times on PV systems vary but
are usually considered to be at least 10 years. Straightforward solar panels,
which simply use the sun to heat water, tend to offer a much shorter payback
period.
Using the wind to produce energy is becoming a viable option for individual
dwellings.
The Swift Rooftop Wind Energy System is just 1.6m in Q37
diameter and costs around £1,300
—it generates around 1.5kWh of energy
every time it turns. An alternative is the Windsave, which operates from the
ground and requires a pole, but the manufacturers claim the £1000 system
can save a third of your annual electricity costs, giving a payback time of
around five years.
Ground source heat pumps are also becoming a realistic alternative.
The temperature at around 5-10 metres underneath the ground surface is at
a constant level of around 10℃. This heat can be extracted using the same
technology as is used in domestic fridges to
provide up to four units of energy Q38
for every one unit of electricity used to
power the system. Installation
costs are between £8,000-12,000. Most experts give the payback time at
around ten years.
It might be worth installing air circulation systems if the house is undergoing
extensive structural renovation. The key to such systems is a heat
exchanger, usually installed in the roof. This unit draws air from the moist
areas of the house—the kitchen and bathrooms—and expels it through the
heat exchanger. At the same time cold air from the outside is drawn in and
warmed by the heat in the outgoing moist air. This Warm air is then transferred
to the bedrooms and living areas.
The best heat exchange units claim Q39
to be able to recover about 90% of the heat that would otherwise be deposited outside.
Installing all the ducting necessary to make systems like this
work can be tricky and messy when the job is a retrofit. However, when this
takes place in a house that is having a total refurbishment, it is unlikely to
cause more disturbance than there is already.
Now, let’s turn to reducing water consumption. Although water bills
are still relatively cheap in the UK, last winter’s drought and this summer’s
imminent water shortages have brought the focus back on to the way domestic
properties use water. All new builds are now required to install a water
meter rather than pay a flat rate charge—and renovators interested in cutting
their consumption would do well to follow this measure, as well as installing
low-flush WCs and
simple showers, rather than power showers—which Q40
use around 20 litres of water a minute.
Even when compared to a bath, which
uses around 100 litres in total, power showers are very high in usage and
those interested in conserving water should consider avoiding them. Fitting
flow restrictors might be an alternative.
For those contemplating a more significant renovation scheme, the installation of a rainwater harvesting system should be considered, as it can potentially reduce a household’s water consumption by around half. Rainwater harvesting systems, which cost around £3-3,500 installed, recycle rainwater and use it to flush toilets, water gardens and for the washing machine.
选项
答案
£135
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3956077.html
相关试题推荐
SECTION4Questions31-40Questions31and32Completethenotesbelow.Write
SECTION3Questions21-30Questions21-24ChoosethecorrectlettersA-C.[or
SECTION2Questions11-20Questions11-15Completethetablebelow.WriteNOM
SECTION1Questions1-10Questions1-5Completethetablebelow.WriteNOMORE
SECTION4Questions31-40Questions31-32Completethenotesbelow.WriteNOM
SECTION1Questions1-10Completethenotesbelow.WriteNOMORETHANTHREEWOR
SECTION4Questions31-40Questions31-36ChoosethecorrectlettersA-C.[ori
SECTION2Questions11-20Questions11and12WriteNOMORETHANTHREEWORDSfo
Completethefollowinginformation.[img]2011q1/ct_eilm_eillist_0001_20111[/img]
Completethefollowinginformation.[img]2011q1/ct_eilm_eillist_0001_20111[/img]
随机试题
Theymayappeartobemarvelsofmodernscience.Buttheideasthatledtot
失学儿童dropout
下列属于短时记忆特点的是()A.保持时间短 B.容量有限 C.意识清晰
有一波阻抗为Z1=500欧架空输电线路与波阻抗为Z2=50欧的两条电缆
不符合芬兰型先天肾病综合征表现的是A.为常染色体隐性遗传性疾病 B.由于编码足
下列有关SARS进展期的叙述,错误的是()A.多发生在病程的8~14天
直接压片的常用辅料是A:干燥淀粉B:微晶纤维素C:甲基纤维素D:糖粉E:
下列因素中,哪种醛固酮分泌 A.循环血量减少B.血钠浓度升高,血钾浓度降低
联产品的联合成本在分离点后,可按一定分配方法在各联产品之间进行分配,分配方法包括
室外排水管网按排水检查井分段试验。试验时间不少于( ),逐段观察,管接口无渗漏
最新回复
(
0
)