This document contains problems from board exams on dryers. The first problem asks to calculate: (1) the required flow of heated air mixture to dry cassava flour, (2) the capacity of the forced draft fan on the dryer, (3) the heat required for heating the air mixture, and (4) the percentage of fresh air in the mixture. The second problem asks to calculate various properties of air before and after passing through an adiabatic drier. The third problem asks to calculate: (a) the required amount of air and (b) the fan capacity to handle the air for drying sand in a dryer.
Air conditioning systems
2. Properties of moist air
3. Moist air processes
4. Space air conditioning
5. Indoor air quality--comfort and health
6. Heat transfer from human body
7. Heat transfer in building envelopes
8. Infiltration heat load and weatherizing
9. Computation of the heating load
10. Heat gain by solar radiation
11. Computation of the cooling load
12. Energy requirements for HVAC systems; building energy audit
13. Fans--performance, selection, and installation
14. Air flow in ducts and fittings
15. Design of duct systems
16. Codes & standards for building energy systems
17. Annual energy consumption
Air conditioning systems
2. Properties of moist air
3. Moist air processes
4. Space air conditioning
5. Indoor air quality--comfort and health
6. Heat transfer from human body
7. Heat transfer in building envelopes
8. Infiltration heat load and weatherizing
9. Computation of the heating load
10. Heat gain by solar radiation
11. Computation of the cooling load
12. Energy requirements for HVAC systems; building energy audit
13. Fans--performance, selection, and installation
14. Air flow in ducts and fittings
15. Design of duct systems
16. Codes & standards for building energy systems
17. Annual energy consumption
This presentation is about the design and function of a microprocessor, how to program and how to interface it with other electronics machines and devices
This course is designed to tackle the fundamentals of Heating, Ventilating, Air Conditioning, and Refrigeration as they relate to human comfort in residential and industrial design applications. The main focus of the course will be to examine the fundamental criteria involved in sizing and design of HVAC systems as well as to investigate the equipment used to satisfy the design criteria. The culmination part of the course is the design of air conditioning and ventilation of a commercial or residential building as a final project or case study.
Chapter 3a air conditioning process pdfCharltonInao1
air conditioning process
This course is designed to tackle the fundamentals of Heating, Ventilating, Air Conditioning, and Refrigeration as they relate to human comfort in residential and industrial design applications. The main focus of the course will be to examine the fundamental criteria involved in sizing and design of HVAC systems as well as to investigate the equipment used to satisfy the design criteria. The culmination part of the course is the design of air conditioning and ventilation of a commercial or residential building as a final project or case study.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
2. DRYER Board exam problems
Drier 5 booklet BP Oct 181 A tower-type, moist air dryer is to deliver
1000 kg/hr of cassava flour with 2% residual moisture of 20% in the feed.
The air to be heated in the heating chamber is a mixture of fresh air at 92
deg.F dry bulb and 65% relative humidity is heated by steam coil to 200
deg.F. The dryer is properly insulated so that moisture absorption can be
adiabatic. Compute: (1) Required flow of heated air mixture to dryer in
pounds per minute. ; (2) Capacity forced draft fan on dryer in cu.mhr ; (3)
Heat in kcal/hr for heating the the air mixture in heating chamber. ; (4)
Percentage of weight of fresh air in mixture.
3. D-2 BP APRIL , 1982
Eight hundred pounds of dry air per hour is saturated at 115 deg.F, then
heated to 224 deg.F, passed through an adiabatic drier and discharged at
142 deg.F. Determine each of the following: (1) Total pounds of water in air
before heating, per hour. ; (2) Final pounds of water in air when
discharged, per hour. ; Water evaporated from material in the drier per
hour ; (4) Relative humidity of air leaving the drier ; (5) Dewpoint of air
leaving the drier ; (6) Percentage of saturation of air leaving the drier ; (7)
Number of cubic feet of air per min. before drying
4. D-3 BP APRIL , 1983
The temperature of air in the dryer is maintained constant by the use of
steam coils within the dryer. The product enters the dryer at the rate of
one metric ton per hour. The initial moisture content is 3 kilograms
moisture per kilogram of dry solid. Air enters the dryer with a humidity
ratio of 0.016 kilogram moisture per kilogram dry air and leaves with a
relative humidity 100% while the temperature remains constant at 60
deg.C. If the total pressure of the air is 101.3 Kpa, determine: (a) Total
required amount of air in kh/hr under entrance condition. ; (b) Capacity of
the forced draft fan to handle this air in cu.m/min.
5. D-4 BP NOVEMBER , 1983
A rotary dryer fired with bunker oil of 10,000 kcal/kg HHV is to produce 20
metric tons per hour of dried sand with 0.5% moisture from wet feed
containing 7% moisture, specific heat of sand is 0.21 BTU/lb per deg.F,
temperature of wet feed is 30 deg.C and temperature of dried product is 115
deg.C.
QUESTION:
1. Calculate the weight in kg. of wet feed per hour
2. Calculate the weight of water to be removed per hour in kilograms.
3. Calculate heat in BTU/hour required
4. Calculate liters of Bunker oil per hour if specific gravity of bunker oil is 0.90
and dryer efficiency is 60%
6. D-6 BP APRIL , 1985
A rotary dryer produces 20 metric tons per hour of dried sand containing 0.5% moisture
from a wet feed containing 10% moisture. Temperature of wet sand is 30 deg.C and that
of dried sand is 114 deg.C. Fuel used per hour of bunker oil is 275 liters, with a HHV of
39,000 BTU/liter. Specific heat of sand is 0.21 BTU/lb-deg.Centrigrade Neglecting
radiation loss, calculate the efficiency of the sand dryer. Specific gravity of oil is 0.9.
Required:
Feed rate in kg/hr
Volume flow rate in the dryer
Heat Supplied to the dryer
Efficiency of the sand dryer
7. D-7 BP OCTOBER , 1985
A dryer is to deliver 1000 kg/hr of palay with a final moisture content of 10%.
The initial moisture content in the feed is 15% at atmospheric condition with
32 deg.C dry bulb and 21 deg.C wet bulb. The dryer is maintained at 45 deg.C
while the relative humidity of the hot humid air from the dryer is 80%. If the
steam pressure supplied to the heater is 2 MPa.abs., determine the following:
1] Palay supplied to the dryer in kg/hr
2] Temperature of the hot humid air from the dryer in deg.C
3] Air supplied to dryer in cu.m/hr
4] Heat supplied by the heater in KW
5] Steam supplied to heater in kg/hr
8. D-9 BP OCTOBER , 1990
Wet material containing 215% moisture (dry basis) is to be dried at the rate
of 1.5 kg/sec in a continuous dryer to give a product containing 5%
moisture (wet basis_. The drying medium consist of air heated to 373 K and
containing water vapor equivalent to a partial pressure of 1.40 kPa. The air
leaved the dryer at 310 K and 70% saturated. Calculate how much air will
be required to remove the moisture.
9. D-10 BP APRIL , 1988
An assembly hall was to have an air conditionaing unit installed which
would be maintained at 26 deg.C dry bulb at 50% relative humidity. The
unit delivers air at 15 deg.C bulb temperature and the calculated sensible
heat load is 150 KW and latent heat load is 51.3 KW. Twenty percent by
weight of extracted air is made up of outside air at 34 deg.C dry bulb and
60% relative humidity while 80% is extracted by the air conditioner’s
refrigertaion capacity in Tons and its ventilation load in KW.
10. D-11 BP OCTOBER , 1981
A continuous dryer is supplied with air at 21 deg.C dry bulb and 16 deg.C
wet bulb heated to 75 deg.C. It enters the heating coils at a velocity of 366
m/min and the size of the circular duct is 183 cm. The condition of the air
leaving the dryer is 43 deg.C dry bulb and 70% relative humiidity. The
moisture content of the entering material is 24% while the moisture
content of the leaving material is 8%. Calculate:
[1] Amount of moisture evaporated
[2] Capacity of dryer
[3]Heat supplied to air
11. D-12Twenty five metric tons of dessicated coconut meat containing 40%
moisture is to be dried to 10% final moisture in 24 hours. Atmospheric air
at 26 deg.C dry bulb and 40% relative humidity is first preheated to proper
temperature before reaching the product. The air leaves the dryer at 29
deg.C dewpoint temperature and 90% relative humidity. Neglecting the
heat capacity of the bone dry stock and the heat needed to heat the copra
tracks, calculate:
[1] The proper temperature into which the air be preheated
[2] The production rate in M.T. per hour of copra
[3] The intake air flow rate in cu.m/sec
[4] The mass flow rate of steam required in the preheated. If steam used
for heating is at 80 deg.C dry and saturated condition.
19. From high temperature psychrometry:
W1 = W2 = 0.0695
𝑙𝑏
𝑙𝑏
W3 = 0.0885
W3’ = 0.126
V2 = 0.0695
𝑓𝑡3
𝑙𝑏
a) Total lbs. of water in air before heating.
0.0695
𝑙𝑏
𝑙𝑏
( 800
𝑙𝑏
ℎ𝑟
)
= 55.6
𝑙𝑏
ℎ𝑟
b) Final lbs of water in air when discharged
= 0.0885
𝑙𝑏
𝑙𝑏
(800
𝑙𝑏
ℎ𝑟
)
= 70.8
𝑙𝑏
ℎ𝑟
c) Water evaporated from material.
= 800
𝑙𝑏
ℎ𝑟
(W3 - W2)
= 800
𝑙𝑏
ℎ𝑟
(0.0885 – 0.0695)
= 15.2
𝑙𝑏
ℎ𝑟
20. D) Relative humidity of air leaving Dryer (psychrometric chart)
= 59%
c) Percentage of air leaving the dryer
W3
W3’
=
0.0885
0.126
= 70.24%
