III. INTRODUCTION Humidification is an operation involving transfer of materials between a pure liquid phase and a fixed gas‚ which is nearly insoluble in the liquid. The liquid contains only one component; hence there are no concentration gradients and no resistance to mass transfer. However‚ it involves both heat and mass transfer that are influencing each other. Humidification operations are mostly applied to air-water systems. To get data for a definite air-water mixture‚ a humidity chart
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1. Is a temperature inversion more likely to form on a calm or a windy night? Why? A temperature inversion is most likely to form on a calm night. Windy nights are not ideal for an inversion to occur since an inversion is considered a stable layer of atmosphere as well as due to the wind mixing the air to even out the density‚ remembering cold air is denser than warm air so it will flow downhill and pool in a valley. 2. What are the various methods used to protect sensitive crops from damaging
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Relative Humidity Lab 1. Yes‚ our relative humidity was different for the two locations because the temperature in the building was lower than the temperature outside. 2. The psychrometer has a "sock" on the bulb of the thermometer. You get the sock wet and twirl the thermometer around for 30 seconds. If the temperature dropped then you spin it again for 15 seconds. Then you subtract the temperature of the psychrometer from the starting temperature and that is the difference. Then you must look
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data sheet Elcometer 116 Whirling & Sling Hygrometer Elcometer 116 Whirling & Sling Hygrometer The Elcometer 116A Whirling Hygrometer is available in °C scale. A guide for Relative Humidity (RH) Calculation is supplied with each instrument. The dewpoint can be accurately obtained using Elcometer 114 Dewpoint Calculator. Elcometer 116 Whirling & Sling Hygrometer Can be used in accordance with: ASTM E 337-B BS 2842 The Elcometer 116C Bacharach Sling Hygrometer is a convenient
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It requires a lot of hit energy to transform a given quantity of water in to vapor. This energy is called enthalpy of vaporization. While water evaporates the temperature around it drops. We see this phenomenon in action in leaving things‚ they use sweat to low their temperature and also in many manmade tools. What is evaporation cooling? Evaporation cooling is a device that cools air by combining the natural process of water evaporation with an air moving system. Evaporative cooling is different
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T-φ gram Determination of Unreported Meteorological Quantities from T-φ gram 1. Mixing Ratio (W):- It is the ratio of the mass of water vapour to the mass of dry air containing the vapours at a certain temperature. It is expressed in gm/kg. On T-φ gram from dew point temperature we follow isohygric doted green line and read the value at the base. (It can be calculated at all levels where dew point temperature is available). 2. Saturation Mixing Ratio (Ws) :- Mixing ratio at
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The Psychometric diagram demonstrates graphically the parameters identifying with water dampness in air. This application note depicts the reason and utilization of the psychometric graph as it influences the HVAC architect or professional. Air includes more or less 78% nitrogen‚ 21% oxygen‚ and 1% different gasses. At the same time air is never dry‚ even in a desert. Two-thirds of the world’s surface is secured with water and this‚ alongside other surface water and downpour‚ keep up low weight
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|Name: |Date: 1-17-13 | Graded Assignment Lab Report Answer the questions. When you are finished‚ submit this assignment to your teacher by the due date for full credit. (4 points) |Score | | | 1. Complete the following table based on the observations you made during the lab. Answer: |Experiment |Observations
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Define human error‚ and explain the HFACS method used to classify human error and how HFACS can be both reactive and proactive. Remember‚ you must have a title page‚ 300 word body written in 3rd person‚ and at least two references. the temperature remains constant and moisture is added by evaporation‚ the absolute humidity(volume of water per volume of air) will increase‚ the relative humidity (percentage of saturation achieved) will also increase and the dew point temperature will also increase
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EXERCISE 14 PROBLEMS—PART I 1. Calculate the temperature of the parcel at the following elevations as it rises up the wind-ward side of the mountain: (a) 1000m 20 °C (b) 2000m 10 °C (c) 4000m -2 °C 2. (a) After the parcel of air has descended down the lee side of the mountain to sea level‚ what is the temperature of the parcel? 38 °C (b) Why is the parcel now warmer than it was at sea level on the windward side (what is the source of the heat energy)
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