4 ms·

They also make it impossible to add air conditioning if I'm reading this right and can only really cool things down to the surrounding temperature (basically at

They also make it impossible to add air conditioning if I'm reading this right and can only really cool things down to the surrounding temperature (basically attempts to keep buildings from turning into greenhouses). Very cool but I don't see this being implemented anywhere where someone can afford AC

b1ue64 4y ago
From the article: "Jaali’s cooling feature relies on the Venturi effect in a similar way to an air conditioning unit. 'When air passes through holes, it picks up velocity and penetrates afar. Due to the small apertures, air gets compressed and when released it gets cooler,' says Pandya."
- wil421 4y ago
  There’s no way holes are going to cool a building down like AC. The building is going to be similar to the outside it will just cut down on the greenhouse affect.
  - manquer 4y ago
    Nobody is saying that lattices are some magic solution that breaks the laws of thermodynamics and cool environments without expending energy. It is an just an amplifier like radiator , to reduce the amount of HVAC you need . In 16th century they built only lattices because that’s all they had. The suggestion is to use those ideas in modern design not copy paste the same designs.
vivegi 4y ago
Using an airconditioner and lattice structures/jaali are not mutually exclusive. As an example, if you consider large buildings like hotels that have an open central courtyard, the open spaces could use the lattice structures for cooling/circulation while the rooms, banquet/conference halls and other closed spaces can use airconditioners. Since the lattices offer passive cooling, they can lower the overall energy bill.
- refactor_master 4y ago
  Given the amount of traffic, street level noise, and air pollution in many Asian countries I don’t see this being implemented any time soon, in places where it matters. Ceiling fans would also work really well, but similarly require openings in buildings. Now you only see them in traditional buildings (read: museums most often) because they were made with airflow in mind, before the age of AC. People will prefer a hermetically sealed building because it’s the best escape from their own mess.
  - Retric 4y ago
    A shell within a shell also works. It’s common for tall building to have air gapped external cladding to reduce the need for cooling. There are significant trade offs around construction costs, views, and the need for cooling. However, the savings can be very significant for more extreme designs.
    - ajmurmann 4y ago
      You are spotty on. That's also what the article described some modern buildings are doing with these jaali screens
  - mellavora 4y ago
    > People will prefer a hermetically sealed building.... where along with being isolated from the natural environment they can be isolated from everyone else and only interact over social media. Sounds a bit like being in a tomb to me, but then again, I was never fully domesticated.
  - samarthr1 4y ago
    Have you lived in a residential area in a city like Hyderabad or Bengaluru before? The smaller side streets are usually peaceful, unless you have the misfortune of living next to a building under construction.
dmos62 4y ago
Also from article, this technique has reduced AC required by ~30%.
triknomeister 4y ago
So, everywhere apart from the top 5% of the world?
dageshi 4y ago
In Thailand it seemed more common to have small spaces indoors that could be sealed and air conditioned very efficiently, typically a bedroom. You might have a semi open plan apartment with the bedroom inside a smaller room with a sliding door you could use to seal it. Quite an efficient approach I thought, doesn't waste energy cooling the entire space but offers somewhere cool if you need it.
wongarsu 4y ago
The examples of modern buildings incorporating jaali all seem to use it too keep the exterior cool (and shaded), with the interior then further air-conditioned as necessary.
ajmurmann 4y ago
If I understood the article correctly, the temperature could be slightly lower than surrounding air sure to the venturi effect. At least that's what the article claimed, even though it provided no concrete numbers on its effectiveness
forty 4y ago
One can prefer not using AC for environment reason even if you could afford it financially.

b1ue64 4y ago

From the article: "Jaali’s cooling feature relies on the Venturi effect in a similar way to an air conditioning unit. 'When air passes through holes, it picks up velocity and penetrates afar. Due to the small apertures, air gets compressed and when released it gets cooler,' says Pandya."

wil421 4y ago
There’s no way holes are going to cool a building down like AC. The building is going to be similar to the outside it will just cut down on the greenhouse affect.
- manquer 4y ago
  Nobody is saying that lattices are some magic solution that breaks the laws of thermodynamics and cool environments without expending energy. It is an just an amplifier like radiator , to reduce the amount of HVAC you need . In 16th century they built only lattices because that’s all they had. The suggestion is to use those ideas in modern design not copy paste the same designs.

vivegi 4y ago

Using an airconditioner and lattice structures/jaali are not mutually exclusive. As an example, if you consider large buildings like hotels that have an open central courtyard, the open spaces could use the lattice structures for cooling/circulation while the rooms, banquet/conference halls and other closed spaces can use airconditioners. Since the lattices offer passive cooling, they can lower the overall energy bill.

refactor_master 4y ago
Given the amount of traffic, street level noise, and air pollution in many Asian countries I don’t see this being implemented any time soon, in places where it matters. Ceiling fans would also work really well, but similarly require openings in buildings. Now you only see them in traditional buildings (read: museums most often) because they were made with airflow in mind, before the age of AC. People will prefer a hermetically sealed building because it’s the best escape from their own mess.
- Retric 4y ago
  A shell within a shell also works. It’s common for tall building to have air gapped external cladding to reduce the need for cooling. There are significant trade offs around construction costs, views, and the need for cooling. However, the savings can be very significant for more extreme designs.
  - ajmurmann 4y ago
    You are spotty on. That's also what the article described some modern buildings are doing with these jaali screens
- mellavora 4y ago
  > People will prefer a hermetically sealed building.... where along with being isolated from the natural environment they can be isolated from everyone else and only interact over social media. Sounds a bit like being in a tomb to me, but then again, I was never fully domesticated.
- samarthr1 4y ago
  Have you lived in a residential area in a city like Hyderabad or Bengaluru before? The smaller side streets are usually peaceful, unless you have the misfortune of living next to a building under construction.

dmos62 4y ago

Also from article, this technique has reduced AC required by ~30%.

triknomeister 4y ago

So, everywhere apart from the top 5% of the world?

dageshi 4y ago

In Thailand it seemed more common to have small spaces indoors that could be sealed and air conditioned very efficiently, typically a bedroom. You might have a semi open plan apartment with the bedroom inside a smaller room with a sliding door you could use to seal it. Quite an efficient approach I thought, doesn't waste energy cooling the entire space but offers somewhere cool if you need it.

wongarsu 4y ago

The examples of modern buildings incorporating jaali all seem to use it too keep the exterior cool (and shaded), with the interior then further air-conditioned as necessary.

ajmurmann 4y ago

If I understood the article correctly, the temperature could be slightly lower than surrounding air sure to the venturi effect. At least that's what the article claimed, even though it provided no concrete numbers on its effectiveness

forty 4y ago

One can prefer not using AC for environment reason even if you could afford it financially.