1- Why use waste heat in air conditioning system? 2- Why during winter season the temperature of supply air must be above form room condition space? 3- Why calculate the metabolic rate of the occupants?
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- A summer air-conditioning shown below is required to maintain a certain room at specified conditions. The layout of the system is indicated on the next page and the specifications are listed below.System specifications:Required room temperature: 23⁰C, 50% Relative humidityAtmospheric pressure: 101 kPaOutside air conditions: 30⁰C, 80% Relative humidity Sensible heat gain: 5 kWLatent heat gain: 4 kWTemperature rise across fan: 1.5⁰CTemperature of air leaving cooler: 12⁰CTemperature of air entering room: 18⁰CApparatus dew point of cooler: 7⁰CA summer air-conditioning shown below is required to maintain a certain room at specified conditions. The layout of the system is indicated on the next page and the specifications are listed below.System specifications:Required room temperature: 23⁰C, 50% Relative humidityAtmospheric pressure: 101 kPaOutside air conditions: 30⁰C, 80% Relative humiditySensible heat gain: 5 kWLatent heat gain: 4 kWTemperature rise across fan: 1.5⁰CTemperature of air leaving cooler: 12⁰CTemperature of air entering room: 18⁰CApparatus dew point of cooler: 7⁰C Draw the processes on a psychrometric chart and determine the following: 1.The ratio of mass flow rate of re-circulated air to the mass flow rate of air supplied to the room. 2.The heat removed by the cooling coil.3.The heat supplied in the re-heating coil. 4.The cooling coil bypass factor.Hello Sir,Good Morning.I have a question in my homework related thermodynamics lesson. The following below is my question. Please advice. Thank you. Regards,Irfan An air conditioning system is used to keep the house at 65°F when the outside temperature is 85°F. The house gets heat through the walls and windows at a rate of 810 Btu/min, and the rate of heat generation inside the house from occupants, lights, and equipment is 120 Btu/min. Determine the minimum power input required for this air conditioning system.
- 23- The process of summer Air Conditioning in coastal region is Select one: a. Latent cooling b. Cooling and dehumidification c. Sensible cooling d. Cooling and humidificationาา 3.15.) In air conditioning unit, 71,000 cfm at 80'F dry bulb 60% th and standard atmospheric pressure, enter the unit. The air leaves the wait at 57°F dry bulb and 90% relative humidity. Calculate the following a.) Cooling capacity of the air conditioning unit, in Btu/h 6.) rate of water removal from the unit. (.) sensible heat load on the conditioner, in Btu/h di) latent heat load on the conditioning in Blu/h e.) The dew point of the air leaving the conditioner.Pick the right combination of True Statements. 1. As the by-pass factor (BPF) of the cooling coil increases, temperature difference between air at the outlet of the coil and coil ADP decreases. 2. As the by-pass factor (BPF) of the cooling coil increases, temperature difference between air at the outlet of the coil and coil ADP increases. 3. During cooling and humidification process, the enthalpy of air may increase, decrease or remain constant depending upon the temperature of the wet surface. 4. During sensible cooling of air, dry bulb temperature decreases but wet bulb temperature remains constant 5. The sensible heat factor for a sensible heating process is 1.0
- Evaporation cooling in cooling towers heat transfer analysis.Why is information regarding the specific volume of gases important to the designer of air-conditioning, heating, and refrigeration equipment?An oversized air-conditioning system will A. cost more to install and operate. B. be more efficient than an undersized air-conditioning system. C. be better able to maintain the desired humidity in theconditioned space. D. require a smaller air distribution system than an undersized air-conditioning system.
- Exercise 17.5 Air is being drawn over the cold surface of the cooling coil of an air conditioning unit. If 10 m/min enters the air conditioner, calculate the mass flow rate of the condensed moisture, given that the air enters at 20°C and 70% relative humid- ity and exits at 12°C dry bulb temperature and 90% relative humidity. Calcu- late the refrigeration capacity of the coil in W and Btu/h. Solution Step 1 Draw the process diagram: ma ma W; H. HTdb refers to .2 the moist air temperature. O none of the above. O the wet air temperature. O the most common air temperature. CIs there any heat loss taking place to the air while undergoing adibatic humidification processes?