e-book

Eco-efficient Materials for Mitigating Building Cooling Needs: Design, Properties and Applications

---

It is becoming increasingly evident that human activities are the major cause of climate
change and global warming. Human activities have caused major changes in our
land, water, and atmosphere leading to permanent modifications to our environment
such as removing major areas of forest land on Earth and increasing atmospheric
greenhouse gases.
As the threat of climate change becomes more pronounced, a number of scientists
have proposed supplementing the full range of mitigation efforts with geoengineering
(manipulation of the Earth’s environment) to quickly respond to this
threat. Many of these proposed geo-engineering techniques are novel and unproven.
One simple technology has been in practice for thousands of years: changing the
solar reflectance (albedo) of the built surface. “Cool roofs” and “cool pavements”
should be among the first geo-engineering techniques used to combat global
warming.
Increasing the solar reflectance of the urban surface reduces its solar heat gain,
lowers its temperature, and decreases its outflow of thermal infrared radiation into
the atmosphere. This process of “negative radiative forcing” can help counter the
effects of global warming. We estimate that resurfacing conventional dark roofs with
a cool white material that has a long-term solar reflectance of 0.60 or more increases
its solar reflectance by at least 0.40. Our research shows that increasing the albedo of a
1 m2 area by 0.01 results in a global temperature reduction of 3
10
15 K and offsets

emission of 7 kg of CO2. Installing 100 m2 of cool roof has an effect on radiative forcing
equivalent to a one-time offset of 28 tonnes of CO2. Similarly, the solar reflectance
of pavements can be raised on average by about 0.15, the equivalent of a 10 tonne
offset in CO2 per 100 m2.

In addition, cool roofs and vegetation reduce cooling-energy use in air conditioned
buildings and increase comfort in unconditioned buildings. Cool roofs,
cool pavements, and urban vegetation mitigate summer urban heat islands
and improve outdoor air quality and comfort. Installing cool roofs and cool
pavements in cities worldwide is a compelling low-cost, win–win–win (saving
cooling energy, reducing urban heat islands, and cooling the globe) activity that
can be undertaken immediately, outside of international negotiations to cap CO2
emissions.

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Woodhead Publishing Series in Civil and Structural Engineering: Number 56

No. Panggil

-

Penerbit

Cambridge : Elsevier Ltd.., 2015

Deskripsi Fisik

xi, 533 Hlm.

Bahasa

English

ISBN/ISSN

978-1-78242-401-7

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

Number 56

Subjek

TEKNIK SIPIL

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar