2015-04-20, 08:18 PM
دیدن لینک ها برای شما امکان پذیر نیست. لطفا ثبت نام کنید یا وارد حساب خود شوید تا بتوانید لینک ها را ببینید.
با سلام
اطلاعات مفیدی در مورد رطوبت و وطوبت گیر داره
خصوصا این قسمت:
1st you need to understand Relative Humidity and how water vapor behaves. All air has some water vapor in it. (even the compressed air you buy) RH is the amount of water vapor in the air relative to the max it could hold at it's temperature and pressure. So 50% RH tells you the air contains half the amount it could hold. 100% is saturated air and it can't hold any more. When you take air and compress it to 100% the air will be at the Dew Point. DP is the point that water vapor will/must condense into liquid. Every cloud in the sky is at this point. So when it happens in a vessel like a tank....condensation must occur. Water always condenses on something. In the clouds it condenses on particles of dust, smoke and pollen. In a tank...it condenses on the tank.
Water vapor in air behaves a lot like liquid water in a sponge. When you take a sponge with the available spaces half full of water (50%) and squeeze (compress) the sponge till there are no empty spaces, the water will start coming out of the sponge.
When you run air thru the compressor.....it is the first water removal for the air. Then when you take that air which has a lot less water in it and run it thru desiccant crystals, they remove even more of the water from that air.
If the pump then takes that air and compresses it to the dew point more water will condense in the pump and when you depressurize the pump to remove it from the gun, you will see water exhausted from the pump. Using my boosting method I never see water come from my pump or see grey grease that has water in it. That tells me that the air I am moving into the gun is not at the dew point and therefore is very dry.
Once air is in the gun and you lower the pressure by shooting the gun, the RH of the air in the gun will do nothing but go down with each shot as you depressurize the reservoir on the gun. So long as the RH is low enough that liquid water is not condensed on the metal, no corrosion can be formed.
I hope this has not been too scientific for understanding. I've only been a scientist for over 40 years. :D
PS if you buy your air compressed already, and you believe that there is no water in that air you bought at the scuba shop or paint ball park or fire station, you are wrong. It's almost impossible to remove all the water from air. It's only dry enough to cause no condensation in your gun, that's all.
ترجمه
اول لازمه بدونید که رطوبت نسبی چیه و بخار آب چطور رفتار میکنه. هر هوایی مقداری بخار در خودش داره. (حتی هوای فشرده ای که می خرید). RH (مخفف Relative Humidity) یا رطوبت نسبی مقدار رطوبت موجود در هوا نسبت به حداکثر مقدار رطوبتی است که هوا می تواند در خود نگاه دارد( در آن دما و فشار). بنابراین 50% RH به شما می گوید که هوا نصف مقدار رطوبتی که می تواند در خود نگه دارد را دارد! 100% هوا اشباع است و بیش از این نمی تواند رطوبت در خود نگه دارد. وقتی هوا را فشرده می کنید در فشار مشخصی به رطوبت نسبی 100% می رسید که نقطه شبنم نام دارد. یعنی نقطه ای که بخار تبدیل به مایع میشود. .....
با سلام
اطلاعات مفیدی در مورد رطوبت و وطوبت گیر داره
خصوصا این قسمت:
1st you need to understand Relative Humidity and how water vapor behaves. All air has some water vapor in it. (even the compressed air you buy) RH is the amount of water vapor in the air relative to the max it could hold at it's temperature and pressure. So 50% RH tells you the air contains half the amount it could hold. 100% is saturated air and it can't hold any more. When you take air and compress it to 100% the air will be at the Dew Point. DP is the point that water vapor will/must condense into liquid. Every cloud in the sky is at this point. So when it happens in a vessel like a tank....condensation must occur. Water always condenses on something. In the clouds it condenses on particles of dust, smoke and pollen. In a tank...it condenses on the tank.
Water vapor in air behaves a lot like liquid water in a sponge. When you take a sponge with the available spaces half full of water (50%) and squeeze (compress) the sponge till there are no empty spaces, the water will start coming out of the sponge.
When you run air thru the compressor.....it is the first water removal for the air. Then when you take that air which has a lot less water in it and run it thru desiccant crystals, they remove even more of the water from that air.
If the pump then takes that air and compresses it to the dew point more water will condense in the pump and when you depressurize the pump to remove it from the gun, you will see water exhausted from the pump. Using my boosting method I never see water come from my pump or see grey grease that has water in it. That tells me that the air I am moving into the gun is not at the dew point and therefore is very dry.
Once air is in the gun and you lower the pressure by shooting the gun, the RH of the air in the gun will do nothing but go down with each shot as you depressurize the reservoir on the gun. So long as the RH is low enough that liquid water is not condensed on the metal, no corrosion can be formed.
I hope this has not been too scientific for understanding. I've only been a scientist for over 40 years. :D
PS if you buy your air compressed already, and you believe that there is no water in that air you bought at the scuba shop or paint ball park or fire station, you are wrong. It's almost impossible to remove all the water from air. It's only dry enough to cause no condensation in your gun, that's all.
ترجمه
اول لازمه بدونید که رطوبت نسبی چیه و بخار آب چطور رفتار میکنه. هر هوایی مقداری بخار در خودش داره. (حتی هوای فشرده ای که می خرید). RH (مخفف Relative Humidity) یا رطوبت نسبی مقدار رطوبت موجود در هوا نسبت به حداکثر مقدار رطوبتی است که هوا می تواند در خود نگاه دارد( در آن دما و فشار). بنابراین 50% RH به شما می گوید که هوا نصف مقدار رطوبتی که می تواند در خود نگه دارد را دارد! 100% هوا اشباع است و بیش از این نمی تواند رطوبت در خود نگه دارد. وقتی هوا را فشرده می کنید در فشار مشخصی به رطوبت نسبی 100% می رسید که نقطه شبنم نام دارد. یعنی نقطه ای که بخار تبدیل به مایع میشود. .....