8 results ·
● Live web index
S
samueli.ucla.edu
research
https://samueli.ucla.edu/researchers-discover-new-mechanism-to-cool-buildings…
Led by **Aaswath Raman,** an associate professor of materials science and engineering at the UCLA Samueli School of Engineering, the research team recently published a study in **Cell Reports Physical Science00334-5)** detailing a new method to manipulate the movement of radiant heat through common building materials to optimize thermal management. However, with the proven success of cooling buildings by using super white paint on the roofs to reflect sunlight and radiate heat into the sky, the researchers set out to create a similar passive radiative cooling effect by coating walls and windows with materials that can better manage heat movement between buildings and their surroundings at ground level. “The mechanism we proposed is completely passive, which makes it a sustainable way to cool and heat buildings with the seasons and yield untapped energy savings,” said Jyotirmoy Mandal, the study’s first author and a former postdoctoral scholar in Raman’s lab.
C
cedengineering.com
article
https://www.cedengineering.com/userfiles/A02-007%20-%20Introduction%20to%20Co…
When natural ventilation can supplant some or all of a building's mechanical cooling requirements, two types of cost savings may result: • The energy costs of operating the air conditioning system. The choice of building cooling strategy (i.e. natural ventilation, evaporative cooling, thermal mass, nocturnal ventilation, or mechanical air conditioning) is determined from the climate data for the site and an evaluation of what strategies work in different climates. Air movement influences the bodily heat balance by affecting the rate of convective heat transfer between the skin and air, and Introduction to Cooling Buildings by Natural Ventilation – A02-007 © J. Combinations may be achieved on a seasonal basis (such as winter mechanical heating with natural ventilation in the summer for cooling) or by spatial zoning in buildings (partly air conditioned and partly naturally ventilated). Natural ventilation is commonly combined with Heating-Ventilation and Air Conditioning (HVAC) systems in zoned buildings and seasonally adjustable buildings.
A
atmos.earth
article
https://atmos.earth/climate-solutions/the-future-of-cooling-was-invented-thou…
They ventilated buildings by funnelling breezes through narrow shafts and expelling hot air, often oriented with four or eight sides to capture
Y
youtube.com
video
https://www.youtube.com/watch?v=ydHlF56CEHg
Earth Air Tunnels are an incredible way to naturally cool and heat buildings using the stable underground temperature.
R
reddit.com
article
https://www.reddit.com/r/explainlikeimfive/comments/j5juoj/eli5_how_air_or_wa…
By running that warm air through a heat exchanger, we can transfer that heat in the air to the water in the exchanger, and then send it outside
E
en.wikipedia.org
article
https://en.wikipedia.org/wiki/Passive_cooling
Passive cooling is a building design approach that focuses on heat gain control and heat dissipation in a building in order to improve the indoor thermal
Y
yourhome.gov.au
official
https://www.yourhome.gov.au/passive-design/passive-cooling
* The main methods to increase heat loss are to place and design openings to allow good ventilation, add ceiling fans or whole-of-house fans, and ensure any air-conditioning works well with building design and insulation. With passive cooling, building envelopes are designed to minimise daytime heat gain, maximise night-time heat loss, and encourage cool breeze access when available. Double glazing can assist in passive cooling, as its low conductivity reduces the heating effect of the hot outside air contacting the glass. The lighter warm air rises and if allowed, will escape the building through high-level outlets (windows or vents), drawing in lower-level cool night air or cooler daytime air from openings in shaded external areas (typically on the south side). For example, running an air-conditioner in a closed room for about an hour at bedtime often lowers humidity levels to the point where air movement from ceiling fans can provide sufficient evaporative cooling to achieve and maintain sleeping comfort.
B
basc.pnnl.gov
official
https://basc.pnnl.gov/resource-guides/passive-and-low-energy-cooling
Sources of airflow for passive and low-energy cooling include wind, the stack effect, whole-house fans, ceiling fans, and small exhaust fans (such as kitchen and bath fans). Most of the concepts listed for wind-driven ventilation apply to whole-house fan ventilation: locate windows/inlets on multiple sides of the house (Figure 31), provide free flow between air inlets and the whole-house fan, locate windows/openings at occupant level for comfort ventilation or to flow across thermal mass for night flush, ensure windows are accessible and easy to operate, ensure windows are of sufficient size, and protect windows/inlets from rain. In hot, dry climates, passive cooling should focus on shading, night flush through cross ventilation and whole-house fans, potentially using high-mass construction. In marine climates, passive and low energy strategies should generally focus on effective shading, comfort ventilation, night flush, and evaporative cooling. In the cold-dry climate, passive and low energy strategies should generally focus on effective shading, comfort ventilation, night flush, and evaporative cooling.