Dew Point Calculator
Pezani chinyezi cha kutentha kwa mpweya ndi kuwala kwa mpweya, ndi khalidwe labwino.
Zithunzizi zimasintha monga momwe mumalemba.
Zachidule
The dew point is the temperature to which air must be cooled for its water vapour to start condensing into dew, and it is the most honest single measure of how much moisture the air actually holds. A higher dew point means more water in the air and a muggier, stickier feel; it is also the temperature at which fog forms, grass gets damp overnight and a cold drink beads with condensation. This dew point calculator derives it from the air temperature and the relative humidity you enter.
It uses the Magnus-Tetens approximation with the Alduchov-Eskridge coefficients (a = 17.625, b = 243.04 °C): first γ = ln(RH / 100) + aT / (b + T), then the dew point = bγ / (a − γ), with T in °C. As a worked example, air at 25 °C and 60% relative humidity has a dew point of about 16.7 °C — comfortable edging toward sticky. Drop the humidity to 30% at the same 25 °C and the dew point falls to roughly 6 °C, distinctly dry. The method is accurate to within a few tenths of a degree across ordinary weather, and the tool works in either °C or °F.
Dew point predicts comfort far better than relative humidity, because relative humidity depends on temperature: 90% humidity on a cold morning feels dry, while 60% on a hot afternoon feels oppressive. As an absolute measure, dew point cuts through that — below about 13 °C (55 °F) feels comfortable, 16–18 °C (60–65 °F) starts to feel sticky, and above 21 °C (70 °F) is oppressive and hard to cool down in. The same value tells you when condensation will form on windows, pipes and aircraft surfaces.
Mafunso ofunsidwa nthawi zambiri
Kodi formula amagwiritsa ntchito kwa mchenga mfundo?
The Magnus-Tetens approximation with Alduchov-Eskridge constants: γ = ln(RH/100) + 17.625·T/(243.04+T), and dew point = 243.04·γ/(17.625−γ), with T in °C. It is accurate to within a few tenths of a degree over normal weather conditions.
N'chifukwa chiyani chinyezi chimakhudza kwambiri kuposa kuwala?
Relative humidity imangodalira kutentha, choncho 90% ya humidity pa 10 ° C imawoneka yofiira pomwe 60% pa 30 ° C imawoneka yofiira. Mtundu wa mchenga ndi njira yokhayo yofiira, chifukwa chake imatsatira momwe mpweya umawoneka bwino.
Kodi mchenga wotentha umawoneka bwino?
Pafupifupi 13 °C (55 °F) pansi pamakhala kolimba komanso kofiira, 16-18 °C (60-65 °F) imayamba kuoneka yolimba, ndipo pamwamba pa 21 °C (70 °F) ndi yopweteka komanso yovuta kuwala.
Kodi chinyezi chikhoza kukhala chochuluka kuposa kutentha kwa mpweya?
Sichoncho. Pafupifupi, phokoso la mchenga limafanana ndi kutentha kwa mpweya, komwe kumachitika pa 100% ya mpweya wotentha pamene mpweya ndi wokwanira. Palibe chinyezi ndi madzi otentha, choncho phokoso la mchenga limasungidwa nthawi zonse pa kutentha kwatsopano kapena pansi pa kutentha kwatsopano.
Kodi ndi chiyani chofiira chokhudzana ndi mpweya ndi kuumba?
Pamene nyanja kapena nyanja yamadzi imatentha mpaka kufika pa mtunda wa mdima, madzi amasungunuka, ndipo pamene mdima umafika pa mchenga, mdima umayamba kuoneka pa mchenga wotentha. Mdima umakhala wotentha kwambiri ndipo umawoneka ngati mdima woyera. Mdima umakhala woyera kwambiri pamene mdima umakhala woyera kwambiri.
Kodi kutentha kwa kutentha kumasintha pamene kutentha kumasintha?
Si pamodzi ndi - the dew point amasonyeza mfundo zatsopano za madzi, zomwe zimakhazikika ngati mpweya umatentha kapena kuwala. Zosintha ndi kutentha ndi mpweya wotentha, chifukwa chake dew point ndi njira yolimba ya mpweya wouma.
Kodi ndi yotani yoyenera ndi Magnus-Tetens formula izi amagwiritsa ntchito?
Kuphatikiza apo, kuwala kwa dzuwa kumatha kuyambitsa kutentha kwa chilengedwe, chifukwa chokhala ndi kutentha kwa chilengedwe kopitilira 1000 °C. Kutentha kwa chilengedwe kumatha kuyambitsa kutentha kwa chilengedwe kopitilira 1000 °C. Kutentha kwa chilengedwe kumatha kuyambitsa kutentha kwa chilengedwe kopitilira 1000 °C.
API — kugwiritsa ntchito izi calculator kuchokera code
Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Chomweko chilichonse chimene mumasiya chimagwiritsa ntchito mfundo yoyamba yomweyi yomwe tsambali limagwiritsa ntchito; mfundo yosadziwika ndi 400, siyiyenera kukhala zero yosadziwika. Onani zonse API docs →
Chithunzi
GET https://calculator.free/api/v1/dew-point/curl
curl "https://calculator.free/api/v1/dew-point/?units=c&temp=25&humidity=60"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/dew-point/?" + new URLSearchParams({
"units": "c",
"temp": "25",
"humidity": "60"
}));
const data = await r.json();
console.log(data.results);Zimenezi ndi zowerengera zokhudzana ndi malangizo amtundu uliwonse, si zokhudzana ndi ndalama, zamoyo kapena zokhudzana ndi ndalama.