Can Air coolers be made in modular form. East to ship, easy to store and easy to use.
Has anyone tried a Peltier Effect cooler? Fitting a large simple panel that can go into walls and roofs, with the heat facing side on the outside of the building? https://en.wikipedia.org/wiki/Thermoelectric_cooling
Mostly Air coolers are modular if they are plain vanilla system is modular. But the system needs the water tank, cooling pad and the pump for the water to circulate and a blower to blow cold air. This is something assembly dependent and there is no way user can put it together. I have spent time designing IoT enabled air coolers. What I see missing is the need for ice cold water which can be replaced by some other mechanisms available to make it efficient. I am not sure what is your ultimate aim based on that the effort will make sense. It is brutal market and works in places where the humidity is less
We have tested Peltier effect units instead of ice cubes in the water. Peltier effect controller take more power generate cold air and the heat generated can't be used so efficiency is low
Need some bounds. The customers and the amount of cooling in energy units and the price range. Note puncture a CO2 small bottle will cool the air. Compressed air through a simple device can put out cold air on one port and hot air on the other. Evaporate water into dry air will cool the air. And all these principles are use to make liquid oxygen and hydrogen.
Peltiers can, but I would need more specifics. I've developed air coolers and liquid coolers with them. They are wildly inefficient as liquid cooler and ludicrously inefficient as air coolers, but depending on what you need to cool and other factors, could still be a good choice. Assuming you mean room AC, then no they are not the tech you are looking for. There are plenty of small room AC units you can buy.
Gopi, A 5 degree delta cannot be achieved in a 150 SF residential room using Peltiers. The power requirement would be significantly higher than the amp service to the house. No solar can’t do that. A simple window air conditioner would be significantly more effective and consume a fraction of the power and a fraction of the cost.
If you want, you can buy Peltier kits on Ebay that come with the proper heat sink, fan, controller, power supply, etc. They are kind of fun to play around with in say a small well insulated cooler or something.
Forget Peltier cooler because it is so inefficient. Basically all cooling means employ a significant change in the relationship between molecules. Semiconductor and magnetic makes such a change as does the major choice expansion of a gas. The basic approaches employed to create a cyclic system has a compression step followed. finally the compressed cooled fluid is allowed to expand. Thus reversing the effect of compression to raise the temperature during expansion is to lower the temperature from the cooled temperature.
The reason I mention this is to point out that the method of compression of a gas or phase change from a gas to a liquid is open to any method. Mechanical means is the typical approach. But for ammonia refrigeration system heating is the method used along with water where the heat is used to change the concentration of water in the ammonia. (the relative vapor pressure of ammonia difference of the mixture acts as the pump) Ammonia evaporates due to heat from the water and after cooling condenses on one side of a trap but is evaporating on the other side after being cooled even more. Evaporation is the significant change in the fluid which causes cooling. To complete the cycle the vapor is exposed to water and is absorbed into it. https://www.arprv.com/how-dometic-norcold-fridge-works.php https://www.brighthubengineering.com/hvac/66065-ammonia-water-vapor-absorption-refrigeration-system/
Water can be used to replace ammonia or many other fluids. For ammonia system water is the absorbent but for a water system other materials that can be solids are used. The sun can be used as the heat source. The process doesn't have to be continuous but can occur in steps. Thus a rotating drum could cycle through them as it slowly rotates. powered by off center weight due to the process or other simple means.
You need to find someone local since outside of the typical system your actually experimenting. Reasonable math skills and some text book or article sources is all you need. The math to calculate the cooling and heating are also found in similar sources. You can put the equations into an excel work sheet. May even find one.
Gaurav, sorry your question went tangential here. I learnt a bunch. Certainly interested in a simple, sustainable, low-cost cooling device for tropical countries. Some ideas here seem good starts.
Tropical countries have high temperatures and high humidity. With climate change, these countries are on the front lines with heat stroke especially among older populations being a grave risk. The use case I am thinking of is for a small house- maybe 1000 SF in total with maybe one room needing to be cooled of about 150 SF. The goal is to cool the room to maybe 5 degrees below outside temperature. Will it work to get a window sized (or even larger size) Peltier unit made up of smaller modules and reduce the room temperature? Further questions may be: How much surface space is require for the peltier unit for different degrees of reduction? What is the minimum/maximum degrees of temperature that can cooled. How much does humidity affect the effectiveness of results? Can the unit be powered by a solar panel on the outside so it is self-sufficient.
What about replacing a large portion of the roof with a Peltier panel with Solar on the outside?