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25

I think the first thing that comes to mind is what you can do to decrease the temperature around the home in the summer. I am here in Jakarta, Indonesia at the moment and I have found that covering the patios with container gardens has a remarkable impact. Beyond this, well-placed trees, and the like, can help a lot. If you compare the house where I am ...


16

Environmental: "Modelling indicates insignificant ozone depletion potential, a significant global warming potential, and negligible acidification potential." reference One gram of R-134a has the same global warming effect as 1.41 kilograms of CO2, while one gram of R-12 is similar to 8.5 kilograms of CO2. reference Toxicity: According to the EPA, the ...


9

According to Environment Canada both R-12 and R-134a have 0 ozone depletion potential. However, R-12 has a global warming potential of 2400 CO2eq, while R-134a has a GWP of 1300 CO2eq. These aren't apples to apples comparisons however. R-12 has an atmostpheric lifetime of about 100 years compared to about 14 years for R134a (NOAA). You also really need ...


8

This is true as much in winter as in summer: keeping shutters closed. It will reduce thermal exchanges, and keep a cool temperature inside. Windows are the main surface for heat exchange in an house/appartment.


7

I think it could work with a minor tweak. If you stick the curtain to the outside of the window and keep it wet (including the surface of the window), it will cool the glass from the outside, which in turn will cool the air on the inside. You will probably end up with condense on the inside (which would prove that it works) but compared to the original idea,...


7

Solar gains account for over half of a typical home's cooling requirements in the northern United States, so shade your windows--preferably from the outside, using awnings and plants. While curtains and window shades will help some, sunlight coming through the window will heat the shades. When the shades heat up, they will transfer some of that heat to the ...


6

That may be as easy as turning off the humidifier or blocking it from the room that the servers are in. If you've got a central heating system just blocking the vent(s) and returns for that and slightly opening a window will give you a slow transition. How much outside air you need depends on how many servers you have. Note that your next problem may well ...


5

Unless you can secure windows so no-one can enter the house don't compromise your safety by having windows open while no-one is at home. Open windows of a vacant house make it easier for burglars to enter the premises: either to ransack or vandalise the premises while you're not at home or they can wait for you so they can take your wallet and/or your car ...


5

With the given parameters you originally gave, the idea won't work. To provide continued cooling, the water blown onto the curtains needs to be able to evaporate water. Without a substantial ongoing supply of fresh air that is below its maximum humidity (for its temperature), the humidity will quickly reach an equilibrium point and then will no longer cool ...


5

Peltier coolers typically use quite a lot of power, and their performance is poor when underpowered (they often don't work at all, or act as heaters). Your second link above is to a cooler that uses 13 Vdc @ 5 Amps = 65Watts. Your 4.5v 18mA cells put out 4.5 * 0.018 = 0.081 Watts each. In theory, if the panels were running at 100% of rated capacity and ...


5

I developed a simple strategy suitable for living in a flat that is not on the top floor: When you wake up, close all windows and put the blindfolds down. This allows to prevent sun rays and hot air for getting in. If you can install some cover on outside of the windows, that would be way better. Aluminium foil would be best but it's ugly. When you come ...


5

I am in Thailand now, it is the hottest time of year, relentless 40C and sun every day. No air conditioning. I survive by staying indoors during the hottest time of day, getting my clothes wet. Sitting close to the ground can help. I find ceiling fans unhelpful as they bring down the hotter air that has risen to the ceiling. Your body adapts to heat after ...


5

You have to also consider the climate where each type of cooler will be used and how each type of cooler works. Refrigeration coolers transfer heat from inside a building to the outside. However, the hotter the outside temperature the less effectively such coolers work. If the outside/atmospheric temperature is 50 C or higher, such coolers will struggle. ...


5

This article describes the difference: EPS is formed as beads (as used in cushions) then heated and pressed together XPS is formed as a sheet or whatever final shape is desired. So EPS will break up more easily and be less waterproof, which makes it likely to degrade faster and be less effective as insulation. XPS will be stronger and better insulating. ...


5

Green roofs help reduce heat significantly. For example in this study Mean daily temperature reductions achieved were 18.0 °C at the soil surface and 27.5 °C below the module and this EPA study mentions 2 studies: Chicago compared summertime surface temperatures on a green roof with a neighboring building. On an August day in the early afternoon, ...


4

I have gone for an entire summer without using electricity. The fastest way to cool down is to take a cold shower or to keep your bath tub filled with water and take a dip when it gets too hot. Also it is sometimes difficult to sleep when it is both hot and humid. To solve that I had to step out of the cold shower without drying off, and falling asleep ...


4

To keep body cool on hottest summer days, I use wet tee-shirt so as to mimic body's natural cooling system e.g. transpiration. Vaporisation of water really helps to feel good even under full sun. For the sake of not using too much tap water I found empirically that wetting at neck and upper back is most water-efficient while achieving good results. At night ...


4

Fan forced ventilation systems Given the description of your situation, it may be worth investing in a controlled ventilation system. In New Zealand, these are popular where the air intake (and a good filter) is in the ceiling space, where warmer air can be drawn into the house, however the controller of such systems can generally be set to target a ...


4

A solution is to grow vegetation along your wall. Here in Europe we see some mansions with huge vines or ivy. It can be beautiful. Not sure what kind of vines you can grow in your place, but it's worth saying, ain't it?


4

The best eco-friendly energy is the one you do not use. So one of the solution I propose is you heat your dorm room as little possible in order to avoid having to cool it down: Do not cook in there. Use low temperature lights. Do not use electronic devices. If you do, shut them down as soon as you can. A refrigerator will heat your room far more than you ...


3

Sorry for the short answer, I can't comment yet due to reputation rules: You're also going to have to deal with the heat generated by the ceiling fan. If it's electric, then it has a motor and generates heat. :/ It may actually be more heat than you can store in water through evaporation. Have you tried putting the water on your roof? If the air is not as ...


3

Due to your humid climate, an evaporative cooler is not likely going to be very effective. A 100% efficient evaporative cooler will only cool down to the "wet bulb" temperature: https://en.wikipedia.org/wiki/Evaporative_cooler For direct evaporative cooling, the direct saturation efficiency, measures in what extent the temperature of the air leaving ...


3

Evaporative coolers are common in dry hot climates. It's different from what you are proposing. It's a box on the roof that has coarse pads (commonly coir) with a small pump that keeps them wet. Air is sucked thorugh the pads, and exhausted into the house. At the cost of more energy, you can use the now cooler air to cool the input air of a second unit. ...


3

Be aware it is not temperature only. If you fill the house up with water saturated air then you use electricity to condense the water out of the air when you turn the AC back on. Nominally you want air cooler than the thermostat and with a dew point of less than 55 Fahrenheit. If the air is 70 and the humidity is 62 it is not worth opening the windows for ...


3

This doesn't use a notifiction service, it just replaces a dumb system with a slightly smarter one. Ebay has lots of 20 buck gadgets that have a remote sensor and have a relay to control 5 to 15 A of current. Using one of these, you can keep the air conditioner off until outside temps exceed a certain value. The 'open windows' criteria is much harder. ...


3

If you can't re-insulate the whole house it might be possible to insulate just your room. Since you're already using an air conditioner the lack of effective thermal mass once you do that shouldn't matter much. But it depends on the extent that you're allowed to modify the house. What we are considering doing in our house is somewhere between building a new ...


3

Background Legislation mandating alternatives To control emissions of HFCs and other fluorinated gases (F-gases), Europe has two pieces of legislation: the F-gas regulation and the Mobile Air-Conditioning (MAC) directive. In the U.S., the Environmental Protection Agency has the Significant New Alternatives Policy (SNAP). Alternatives to HFCs The EU ...


2

If your house has a flat roof, cover it with water. This will of course require relatively large amounts of water, so the total energy requirements (not just yours) may not be less.


2

I agree with the above answers but also depending on your location the results can vary. If the air is hotter outside than inside, opening windows can hurt your efforts. If this is the case and your house is in direct sunlight covering the windows during the day can decrease the amount of absorption significantly. If your house has many floors it is crucial ...


2

If I remember my high school tuition correctly, you need to put 4.5 volts through the chip and measure the current. 5 volts would be better if you can get panels that provide it, as the chip will likely function more efficiently at its designed voltage. Essentially what you are measuring is the resistance of the chip. This could be done with a multimeter, ...


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