A college classroom is designed for an occupancy of 30 persons. The ASHRAE Standard calls for a minimum outside airflow rate for classrooms of 25.49m^3/hr per person. The target inside design temperature is 19°C and the outside design temperature is 39°C Determine the sensible

A college classroom is designed for an occupancy of 30 persons. The ASHRAE Standard calls for a minimum outside airflow rate for classrooms of 25.49m^3/hr per person. The target inside design temperature is 19°C and the outside design temperature is 39°C Determine the sensible

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

need soon. in detailed
52. Nitrogen with a mass of 3.82kg expands at constant pressure. The initial pressure and temperature in the piston-cylinder system are 172 kPa and 23.4°C, respectively. Because of the heat transfer, the system reached final temperature of 206.4°C. Compute for the work in kJ
30. A classroom type room with 45students taking an exam in thermodynamics is expected to release a body heat of about 8kJ/hr per person. In order to compensate this heat dissipation, an air- conditioning unit is to be installed. If specific heat capacity and density of air is 1.0062kJ/kg-K and 1.2kg/m³, determine the volume of air flow required in examination room if the air is to be cooled down from 29°C to 20°C. a. 8.5177L¡/s b. 9.1262Lİ/s c. 9.2022L¡/s d. 9.0501Lİ/s
Requirements: REQUEST TO YOU SOLVE ALL PARTS HANDWRITING THANKS FULL WARRANTY SOLUTIONS NEED . NO NEED GENERALIZED ANSWER OK
Class Task 2.1 2.2 2.3 2.4 2.5 A two-stage, single-acting air compressor with a polytropic index of 1.35 runs in an atmosphere with free air conditions at 87 kPa and 20 °C. It has a FAD of 4 m³/min with a delivery pressure of 1 MPa. Induction occurs at 80 kPa and 30 °C. The mechanical and motor-drive efficiencies are 80% and 90% respectively. Assume complete inter-cooling and neglect clearance volumes. Draw a P-V-diagram to illustrate the operation of the two-stage compressor and assign relevant numbers. Mention 2 consequences of imposing Perfect Intercooling as a pre-requisite condition in multistage compression. Calculate: The intermediate pressure, The temperature of the air at entrance to the intercooler, The rate of heat rejected in the intercooler (kW), The input power from an electric motor. C
18. A classroom type room with 45students taking an exam in thermodynamics is expected to release a body heat of about 8kJ/hr per person. In order to compensate this heat dissipation, an air- conditioning unit is to be installed. If specific heat capacity and density of air is 1.0062kJ/kg-K and 1.21kg/m³, determine the volume of air flow required in examination room if the air is to be cooled down from 29°C to 20°C. a. 8.5177L¡/s b. 9.1262Lİ/s c. 9.2022Lİ/s d. 9.0501Lİ/s
The air in a theatre room must be 22 °C and the relative humidity 55%. The outdoor temperature is 30 °C and relative humidity 50%. There are 900 seats in the room and 25 m³/h of fresh air is reserved for each seat. Every attendant releases a heat load (sensible + latent) of 100 W and a moisture load of 80 g/h. The sum of heat loads from other than human sources is 20 kW. What must the supply air state be in order to maintain the indoor conditions mentioned above?
Question 1: An air cooling system is to be used to cool a storage facility. The facility is to be maintained at 10°C at all times. It is estimated that the facility is absorbing heat at a rate of 100 MJ/hr when the outside temperature is 35°C. a. Draw the system that includes the facility and a cooling unit. b. Write the energy balance for the storage facility and determine Wnet, Qin and Qout- c. Under this condition, determine the minimum power required to drive the cooling system and calculate cooling capacity (ton of refrigeration) and SEER rating. d. What is an additional information that you need in order to calculate the actual power required? Give an example of calculation.
Construct a mass and energy flow diagram for the following systems. a. A cube sliding across a textured surface b. A steam turbine with high pressure inlet and condensate outlet. c. Fog is formed when you breathe out with your mouth during winter.
Write the energy balance for the described control volume
Problem 5. A 1000 cubic foot room is initially at standard temperature and pressure. A resistance heater in the room is consuming 1500W of electricity. What is the air temperature of the room after 3 hours? Assume the room acts as an isolated system. Hint: The specific heat of a substance is the amount of heat it takes to warm one unit mass of material by one degree. The specific heat of air (assuming constant volume) can be taken as C₂ = 700J/kg°C. This relates the total heat added to the system to its temperature rise.
QUESTION 27 A four-stage single-acting air compressor running in an atmospheric at 87 kPa and 15°C has a F.A.D of 2.83 m³/min. The section pressure and temperature are 80 kPa and 32 °C respectively, the delivery pressure is to be 7 MPa. The temperature at the start of compression in each stage is 32 °C, take n=1.3 for all stages. With reference to formula file the applicable formual number to find the mass flow rate and power input is and , respectively. The mass flow rate to 3 decimal places in kg/min and power input in kW to 1 decimal place are: , and , respectively. No need to add units