ASHRAE PSYCHROMETRIC CHART NO 1 PDF

ASHRAE PSYCHROMETRIC CHART NO.1 D AT N U R PO PE M R 45 TE PE N TU O 65 TI -B HUMIDITY RATIO – POUNDS MOISTURE PER POUND . ASHRAE PSYCHROMETRIC CHART NO NORMAL TEMPERATURE. BAROMETRIC PRESSURE: kPa. Copyright AMERICAN SOCIETY OF. ASHRAE PSYCHROMETRIC CHART NO. 1. NORMAL TEMPERATURE SEA LEVEL. BAROMETRIC PRESSURE kPa. COPYRIGHT AMERICAN.

Author: Tugrel Bragar
Country: Moldova, Republic of
Language: English (Spanish)
Genre: Automotive
Published (Last): 22 September 2018
Pages: 108
PDF File Size: 2.38 Mb
ePub File Size: 13.74 Mb
ISBN: 498-7-82096-853-4
Downloads: 82081
Price: Free* [*Free Regsitration Required]
Uploader: Gagal

The ratio of the vapor pressure of moisture in the sample to the saturation pressure at the dry bulb temperature of the sample.

The name implies that the sensing bulb or element is in fact dry. New in the Third Edition: A psychrometer is a device that includes both a dry-bulb and a wet-bulb thermometer. Load Calculation Applications Manual, 2nd ed.

ASHRAE Chart no1

Knowing both the dry-bulb temperature DBT and wet-bulb temperature WBTone can determine the relative humidity RH from the psychrometric chart appropriate to the air pressure.

The outer scale gives the ratio of enthalpy difference to humidity difference. The psychrometric ratio is ashraee important property in the area of psychrometry, as it relates the absolute humidity and saturation humidity to the difference between the dry bulb temperature and the adiabatic saturation temperature. Create psychrometric processes by plotting points then connecting them with process lines. They are also available in low and high temperature ranges and for different pressures.

In psychrometrics, the term quantifies the total energy of both the dry air and water vapour per kilogram of dry air. These are oblique lines drawn diagonally downward from left to right across the chart that are parallel to each other. These are the horizontal lines on the chart. Many substances are hygroscopicmeaning they attract water, usually in proportion to the relative humidity or above a critical relative humidity. So the temperature value that allows this process condensation to take place is called the ‘dew point temperature’.

TOP Related  50 PILKU ATSPALVIU EPUB DOWNLOAD

Analogous to the specific volume of a pure substance. Humidity ratio is usually expressed as mass of moisture per mass of dry air pounds or kilograms of moisture per pound or kilogram of dry air, respectively. These intersect the saturation curve at DBT point. It may be evaluated with the following equation: Such substances psychrometrc cotton, paper, cellulose, other wood products, sugar, calcium oxide burned lime and many chemicals and pxychrometric. The dew point temperature is equal to the fully saturated dry bulb or wet bulb temperatures.

Heating, ventilation and air conditioning.

Molds and fungi can be controlled by keeping relative humidity low. Psychrometrics Humidity and hygrometry Heating, ventilating, and air conditioning.

Create an unlimited number of psychrometric chart projects.

The mass of water vapor per unit volume of air containing the water vapor. These are not parallel to wet bulb temperature lines. Industries that use these materials are concerned with relative humidity control in production and storage of such materials.

The dry-bulb temperature is the temperature indicated by a thermometer exposed to ashrea air in a place sheltered from direct solar radiation.

These lines are drawn straight, not always parallel to each other, and slightly inclined from the vertical position. Also, create custom labels anywhere on the chart. Some psychrometric charts use dry-bulb temperature and humidity ratio coordinates. Humid heat is the constant-pressure specific heat of moist air, per unit mass of the dry air. A sling psychrometer requires manual operation to create the airflow over the bulbs, but a powered psychrometer includes a fan for this function.

TOP Related  UBUNTU TERMINAL BEFEHLE PDF

Views Read Edit View history. Pressure Liquid water Avogadro’s law Nucleation Thermodynamic equilibrium. The protractor on the upper left of the chart has two scales.

Psychrometrics – Wikipedia

In industrial drying applications, such as drying paper, manufacturers usually try to achieve an optimum between low relative humidity, which increases the drying rate, and energy usage, which decreases as exhaust relative humidity increases. Sshrae psychrometric chart is a graph of the thermodynamic parameters of moist air at a constant pressure, often equated to an elevation relative to sea level.

Architectural acoustics Architectural engineering Architectural technologist Building services engineering Building information modeling BIM Deep energy retrofit Duct leakage testing Environmental engineering Hydronic balancing Kitchen exhaust cleaning Mechanical engineering Mechanical, electrical, and plumbing Mold growth, assessment, and remediation Refrigerant reclamation Testing, adjusting, balancing.

Analogous to the specific enthalpy of a pure substance.

Retrieved 18 September Android app no longer available. Many psychrometric properties are dependent on pressure concept:.