How does a roof pond work?

How does a roof pond work?

The roof pond being exposed during the day absorbs heat through solar radiation and transfers it into the interior of the house, thus, passively warming it up. During night time, a protection cover can be placed over the pond to prevent heat loss.

In which climate region are roof ponds effective?

Roof pond systems are particularly effective in regions of low humidity and clear summer nights.

What is a Trombe wall and how does it work?

A Trombe wall is a massive equator-facing wall that is painted a dark color in order to absorb thermal energy from incident sunlight and covered with a glass on the outside with an insulating air-gap between the wall and the glaze.

What does a solar chimney do?

A solar chimney is a technology that can be used to enhance the ventilation of a residential or commercial structure and uses the same principle at play in a fireplace. Heat naturally rises—like air from a fire will rise through a chimney—creating draft and taking the smoke with it.

What is roof pond?

The roof pond concept combines the traditional functions of a roof with a means of natural heating and cooling. The key elements of the concept are: Use of water for heat storage and as interim heat sink. Thermal coupling of the water with the occupied spaces.

How solar roof pond on buildings work in summer and winter seasons?

During daytime in summer months, the movable insulation is covered over the roof pond so that solar heat gain is minimized and water absorbs heat from the room to provide the cooling effect inside the living space.

How thick should a Trombe wall be?

8- to 16-inch thick
Trombe Wall Construction A typical Trombe wall consists of an 8- to 16-inch thick masonry wall coated with a dark, heat-absorb- ing material and faced with a single or double layer of glass. The glass is placed from about 3/4″ to 6″ away from the masonry wall to create a small air- space.

Do solar chimneys need wind?

The suction created at the chimney’s base can be used to ventilate and cool the building below. In most parts of the world it is easier to harness wind power for such ventilation as with a windcatcher, but on hot windless days a solar chimney can provide ventilation where otherwise there would be none.

Where should a solar chimney be placed?

It is coloured black because this minimizes the amount of sunlight that is reflected off of the chimney, absorbing more of the heat and ensuring more of the heat is transferred to the air inside the building. As well, these chimneys are generally placed on a south-facing wall if the home is in the Northern hemisphere.

What is passive cooling techniques?

Passive cooling techniques and their classification. Passive cooling techniques use ambient cooling sinks like building material, air, water, night sky, etc. to mitigate the rise in temperature of the building due to heat sources such as ambient air, direct solar heat gain, building an internal heat gain.

What is solar water heater system?

Solar water heating system is a device that helps in heating water by using the energy from the SUN. This energy is totally free. Solar energy (sun rays) is used for heating water. Water is easily heated to a temperature of 60-80o C.

How effective are Trombe walls?

While passive solar techniques can reduce annual heating demand up to 25%, specifically using a Trombe wall in building can reduce a building’s energy consumption up to 30% in addition to being environmentally friendly.

How effective is a solar chimney?

Solar chimneys are particularly effective in climates that are humid and hot. They are most efficient when they are tall and wide, but not very deep, as these proportions both maximise the surface area that can absorb solar radiation and maximise the surface area in contact with the air inside the chimney.

What is night flushing?

Sometimes called night flushing or night purging, night cooling is a strategy that uses the natural fall in temperature that occurs overnight to maximise the efficiency of a building’s ventilation, refreshing internal spaces ready for the next day.

How do I cool my roof space?

Place incoming vents low in the roof, ideally in a cool place. Under the eave is a good spot because the air there doesn’t receive direct sunlight, so it’s cooler. Air entering from a cool area will keep the temperature in the roof cavity low.

What is the cost of solar water heater?

Top Selling Solar Water Heaters Price List in India

Latest Models	Price	Discount
Shiv Power SWH Thermal ETC Solar Water System, Capacity: 200 Litre	₹37,873	20% off
ORB 100 LPD Solar Water Heater	₹19,824	15% off
V-Guard Win Hot 300 LPD Solar Water Heater	₹57,897	9% off
ORB 150 LPD Solar Water Heater	₹24,449	15% off

What is the best thickness of the Trombe wall with vent?

30–40 cm
It was recommended to use a fan for vented type trombe wall and a suitable insulation, which improves the efficiency by 8% and 56%. Optimal size and thickness of the wall of trombe wall was found to be 37% and 30–40 cm for its optimal performance.

What is passive cooling design?

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 comfort with low or no energy consumption.

How do you make a passive cooler?

If the weather cools down at night but doesn’t get breezy, place box fans in windows on opposite ends of your apartment. Have one blow inward so it pulls the cool air in, and one blow outward to push the hot air out. Turn on your bathroom fan or stove exhaust. These will pull the warm air up and out of your apartment.