Current SE-Asian Heatwave. My take of what lies ahead...
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- Опубліковано 4 тра 2024
- Hi, in this video, I want to reflect on the current SE-Asian Heatwave which we are suffering here. There are big challenges for the societies of countries such as Thailand laying ahead.
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Roland, best to rely on your own measured temperature, humidity etc. I have learned long ago that weather apps and official meteorology data does not reflect real world temperature, rainfall or humidity. Where I live, the local "official" weather station in the closest town, is surrounded by more vegetation, shade, water mist from watering the green grass, less geo thermal mass. The local weather station is located at a lower elevation to where I physically reside, surrounded by less thermal mass geological heatsink or urban island effect, has more rainfall, and more trees, etc. The difference between my measured temperatures compared to the closest local weather station is typically 3°C for Summer and 5°C for Winter. For example, if the local weather station data shows 45°C air temp in shade on meter above the ground, then for me it is really 48°C for same variables. Likewise for Winter, the weather station reports -2°C yet for me it is actually -7°C (as I am exposed to the cool southerly winds during Winter).
Yes, official data is always averaging and smooting out so that people don't panic :)
Maybe a solution could be to build special cooling rooms. It is difficult to make a whole house energy efficient, but it could be feasible do it for a single room. If you cover walls and ceiling with insulation material (Styropor), provide a tight window and a tight door, it should not bee too expensive to run an AC for this room.
Yes. Sleeping rooms will probably be the main places you will want to get temperatures lowered in order to recharge your body for another day of torture :)
Now one might say that people sleep when there is no sun. So the energy can only come from storage which wouldn't make much sense for poorer people. Well, maybe societies will shift its time of activity into the nights anyways when the planet is to hot during the day, which can already be seen. Vendors, markets, etc all shifting its operational hours.
People will then sleep during the day when sun can operate those A/Cs from PV systems.
@@RolandW_DIYEnergyandMore new insulating materials that allow passing infrared radiation to the outside could also provide a solution. One candidate is an aerogel made of PE,polyethylene, a very common and cheap type of plastic. It could keep the Inside 10 degrees cooler than the outside of a building, a report says. An other describes fabric that can be used to make tents. A study reports that a car covered with it remains up to 30 degrees cooler than without. Maybe you are interested in this research: ua-cam.com/video/2iwXdGxyzYw/v-deo.htmlfeature=shared .Meanwhile: in my area I had to heat my house until End of April and I am happy that I now do not need the heating anymore for the next months until end of September , probably.
Underground areas will give some relief. A small survival room built with heavy insulation. The problem is poor people will suffer the most. Here in Canada we seldom have a 40c day but there are a few in some summers but we have lots of cool fresh water lakes to relax in. If I could only get some of that heat next January lol.
In India rich houses have a sort of low tech aircon, where they first pull the hot outside air through underground channels to cool it down and then distribute inside the house.
Sounds like Outback Australia, except we have less vegetation, rain water and shade. I live far below the Tropic of Capricorn (Australia) and it is more miserable compared to the tropics. At least the tropics has more rain which brings relief during heatwaves. Where I am, it would be rare to have more than 6 thunderstorms in an entire year. Most of the peak Summer has large patchy clouds, high humidity and little rain. Everywhere else around me (approx 70km radius) there is plenty of thundertorms and rain, but they blow around me due to topographical terrain. I reside on a massive exposed ground heat sink, which causes massive geothermal heat colums to rise and displace the forming rain clouds above away from me. Hence where I live there are plenty of eagles and birds of prey, that spend much time soaring and riding the geothermal heat columns.
Can people grow food there where you live? Would you be well supplied if the area is cut-off by any reason?
@@RolandW_DIYEnergyandMore Thankfully, we sit on The Great Artesian Basin (Australia's largest fresh groundwater aquifer and probably largest proven groundwater basin in the world). So, beneath our feet there is plenty of freshwater. We drill and tap into it for water. So much water beneath us, that it does not matter if it rains or not. Yes, we can grow plants, produce etc, though we need to break up the ground and turn it over with fertilizer or imported (from another locality) manure.
I don't know what should be my reaction to this video as a native Thai.
He's basically saying that people are f***
Energy's expensive, government doesn't give a ****, people are poor, and of course, look at my house.
😂😂😂
Anyway, I have seen your AIO inverter damaged from a surge, which makes me realize that I over spec my spd, and it's only class II.
So, thank you for sharing, now back to spending more money.
Hi, while the video was more like the general challenges here in the Tropics, with me happening to live in Thailand, you still could just have shared your views about how you expect that your life and that of your family, kids will look like in future instead just pushing back with the "national, personal denial comment".
I am aware that the last thing what Thai people need, is the advice or shared view of a farang about their country. So, maybe a Thai official can tell that better: ua-cam.com/video/OzBGeRwIL3g/v-deo.htmlsi=XpfO4GStrkl_ss9k
Quoting: "He's (me the creator of the video) basically saying that people are f***"... Well yes, but that is true for almost every part of the world, but especially the Tropics will be one of the first regions on earth which will encounter "Extreme Heat Stress" for extended periods of time each year
"Energy's expensive"...oh yes, compared to the average purchasing power of a Thai, energy in Thailand is very expensive
"government doesn't give a ****"... that is what you say, is it?
"people are poor"...if you are other opinion, and not just because you are the fortunate and are not poor, then that is great. But unfortunately there are statistics, as well certain welfare given to a certain amount of population which says the opposite.
www.nationthailand.com/thailand/economy/40023474
But anyway, if you think that the average Thai is not poor, then be assured that climate change and its effects which will hit Thailand (as the rest of the world) will make everybody much poorer
"and of course, look at my house"...I am sure that's not your house, and I was giving an example how the Aircon of a simple Thai house looks like. This type of houses are the normal in rural Thailand. The fancy new construction ones which are popping up everywhere are better. But they are out of reach for many, especially as they could never afford that way of life with a new house which requires electrified Aircon.
Everyone always prefers his perspective when going into a discussion. And that is OK, as this is the perspective someone is most familiar with. But still don't forget that there are other, less fortunate people out there. And usually those people do the jobs in our society which are harder (like building the homes and feeding the more fortunate).
Anyways, again much to much swivel from a farang who after being here for 15 years, building up a business which is employing several villagers, still has no clue how thing work here.
But that's not even the point. The point is that this danger to OUR survival is a global problem and not a Thai problem.
Hello,
Don't take this the wrong way, I did agree with you, for the most part. This comment is more of a reaction, maybe the tone that came out is bad?
Since you have lived in Thailand for 15 years I think you would have understood my tone. It's like when you are joking with your friends that we're all doomed. I don't know maybe I shouldn't have commented on your video.
@@PatipanWongkleaw understand. no worries 🙂
In Myanmar, Chauk, the temperature is actually 47°C
Oh my Dear. How do you coop with that? We are near the sea, so it's not getting that hot, but humidity is driving the "Feels like" temperatures up.
I bath thrice a day and make a good air ventilation. I only have those solutions. If Electricity available, I got a fan. There is Power cut off of three 4 hours in a day.
@@amthan1382 Wow. Respect. All the best and stay safe!
@@RolandW_DIYEnergyandMore Normal. I did the same for years, before I upgraded the primary solar system to start running an air con and completing the primary dwelling on rural property. Miserable and hot. Typical daytime temps reach over 45°C peaking at 48°C for approx 3 to 4 weeks, and humidity sitting above 80%. I use to spend most of time during these temps with a high velocity fan and plenty of water being sprayed on me under a corrugated iron roof with no insinulation, with dirt as the flooring years ago. Hot and miserable. Night time was worse, if trying to sleep on a mattress bed. Better off in a hammock at night time, with a mosquito net. Since using air conditioner, I do not miss the miserable days and nights of years ago. Not for the faint hearted. Thankfully I was slim build and could easily cool down, unlike larger bodied people. If you don't have running air con, then you really don't have other options.
@@Matthew_Australia Wow mate. There are really tough places to live. You where a strong man, now imagine such conditions are normal for a billion of ordinary folks. Oh well...
Could it be the old constructions were designed to wick moisture from the ground, then have an evaporative cooling effect in summer? Perhaps some of this knowledge is being lost over time.
I wonder what the minimum bill of materials would be for a kit, with something like a 9k btu window AC, with solar panels and inverter sized to run only in full sun without grid intervention.
Enough to have at least one room shaded by panels and cooled.
Perhaps a homologated kit, sold freely could keep the the red tape and installation costs from spiraling, as they do
A 9kBTU A/C unit pulls around 800W. So, a 1500W inverter connected to 4x550W panels would do the job easily most of the day. That's an investment of overall 1500 USD. The inverter would have to be something like a pump inverter which starts automatically as soon the required power is available.
These cheap houses here definitely do have moist floors as they are lacking real foundations, but I do not know if that is intentionally :) Its like tiles on a bit of concrete onto the top soil. This will have a cooling effect, but I think there are limits when outside temperatures do not drop below 30degC even during the night.
I wonder if there is a big enough market for an 'all-in-one' variable speed AC unit that could run directly from solar DC bus, with software to ramp the compressor as conditions allow. Maybe recreational vehicle market could cover the initial investment?
Solar DC, directly to variable speed AC, maybe some supercap to ramp down during sudden shading
This would save conversion steps and components, instead of the traditional going from solar DC to AC, to rectified DC to variable AC (compressor)
@@Username-qx9gk well, you could run the compressor directly with a DC motor. 2 panels in series, 2 strings in parallel. 72V DC motor like in E-Bikes. Bit of electronics and just let it run as fast the PV can supply power. Yep, as you said, DC direct -In with some buffer. Compact all-inside unit. No hussle and fussle...
@@RolandW_DIYEnergyandMore The only DC compressors I've seen are small and expensive, niche applications, vehicle refrigerators and such.
Economies of scale are already there for variable speed compressors (BLDC?), for instance a unit like MAW08V1QWT modified with a different control board and the relevant PV connections and safety components (on the exterior?).
I presume such a unit first rectifies AC into a DC bus close to that of 4 panels. Higher wattage panels could even power a 12k btu unit if I'm not mistaken.
There must be a lot of shared engineering between AC inverter PCB and solar inverter PCB
@@RolandW_DIYEnergyandMore There are DC fed ACs on market for direct solar applications and any inverter AC has a DC compressor. Here in Thailand only very cheap "Window" ACs are available which are often offered together with a cubic bed tent. They draw 450 watts. They cost arround 4kBaht. To bring boddy temperature down and for sleeping they work.
The energy market should be liberated. Companies which install solar systems for free and charge the owner of the property with less for electricity than PEA should have free hand. But theres a law which gives PEA only the right to produce electric energy (for others).
PEA and MEA have the monopoly of power distribution to the clients. There are a lot of private energy producers like Gulf Energy, etc in Thailand. The government gave them long lasting contracts to feed their overpriced energy into the grid. That's why the electricity in Thailand actually is quiet expensive.
The ordinary person and house owner should have the right to install a 5kWp PV system on his property without any regulatory red-tape. I am all for not getting money for feed-in to the grid, but get free hand of using the grid to connect hybrid systems.
@@RolandW_DIYEnergyandMore My hybrid system is never connected to the grid, so I am free to do what ever I want (please Don't tell some other) I use the Grid only like a normal consumer if my hybrid system gets not enough sun or is discharged, but as I mentioned, theres never any electrical connection between my solar system and the grid. So theres no risk to endanger the grid with my system and so theres no regulations are needed.
@@topeye4202 yes. Technically those "All-in-one" Inverters which only bypass to the grid are Off-Grid Inverters
@@RolandW_DIYEnergyandMore My Inverter pass through as soon grid is connected, unfortunately it works like a UPS even there are adjustable parameters in menu to priorytise other sources. So the grid is not connected at Inverter input and its solved by a external transfer switch now. A low battery transfer switch also was needed, cause if the Inverter stops when low battery level is reached it starts only if the battery is completely charged again. I didn't know that before, otherwise these two transfer switches could be combined by using the relay JQX-62F2Z, a voltage detection controller module and two 230V relays for less money than the ATS costs and with quiet switching.
But traditional ACs would be a problem cause of the high inrush current and inductive blind current. Inverter AC's as I have dont cause any problems like that. Other peak loads from kitchen I detect with a current switch and automatically switch over to grid if more than 10 amps are requested. Reset has to be done manually.
Yes a permanent grid connection solves such problems in a easier way but the components i used arent expensive and make it possible to install any solarsystem regardless of any external red lines.
@@RolandW_DIYEnergyandMore UA-cam hat mir die lange Antwort hier gelöscht, hab dir den Plan meiner Anlage per Email geschickt..ist ev im Spam gelandet...