place where it is ‘not wanted’…
… to a place
where it is ‘unobjectionable’.
- Главная
- Разное
- Бизнес и предпринимательство
- Образование
- Развлечения
- Государство
- Спорт
- Графика
- Культурология
- Еда и кулинария
- Лингвистика
- Религиоведение
- Черчение
- Физкультура
- ИЗО
- Психология
- Социология
- Английский язык
- Астрономия
- Алгебра
- Биология
- География
- Геометрия
- Детские презентации
- Информатика
- История
- Литература
- Маркетинг
- Математика
- Медицина
- Менеджмент
- Музыка
- МХК
- Немецкий язык
- ОБЖ
- Обществознание
- Окружающий мир
- Педагогика
- Русский язык
- Технология
- Физика
- Философия
- Химия
- Шаблоны, картинки для презентаций
- Экология
- Экономика
- Юриспруденция
Что такое findslide.org?
FindSlide.org - это сайт презентаций, докладов, шаблонов в формате PowerPoint.
Обратная связь
Email: Нажмите что бы посмотреть
Презентация на тему Refrigeration Fundamentals. Part 1. Heat and Heat Transfer
Содержание
- 2. Sect. 1What is Refrigeration?
- 3. Sect. 1DEFINITION‘Refrigeration’……is the transfer of heat from
- 4. Sect. 1HEAT REMOVALIf heat is removed from
- 5. Sect. 1WHAT IS HEAT?A Form of EnergyIt
- 6. Sect. 1WHAT ARE REEFERS?Machines that ‘Move Heat’
- 7. Sect. 1‘HOW’ DOES HEAT MOVE?Warmer ⇒ Colder - ALWAYS!!!!!!!HeatHeatHeat‘Faster’ with Large Temp. Difference
- 8. Sect. 1‘HOW’ DOES IT MOVE?Heat can move three (3) ways….1. Conduction2. Convection3. Radiation
- 9. Sect. 1CONDUCTIONHeat moves through Solids & Liquids
- 10. Sect. 1CONDUCTION Heat will move Between Solids
- 11. Sect. 1CONDUCTION
- 12. Sect. 1Any other Examples of Conduction?
- 13. Sect. 1CONVECTIONDefinition - Heat transfers via the
- 14. Sect. 1‘NATURAL’ CONVECTIONWarm Air RisesCool Air FallsHeater
- 15. Sect. 1‘NATURAL’ CONVECTION
- 16. Sect. 1‘FORCED’ CONVECTION
- 17. Sect. 1‘FORCED’ CONVECTION
- 18. Sect. 1Any other Examples of Convection?
- 19. Sect. 1RADIATIONMoves in Straight Lines… like lightDoes
- 20. Sect. 1RADIATION
- 21. Sect. 1RADIATION
- 22. Sect. 1Any other Examples of Radiation?
- 23. Sect. 1HEAT TRANSFER SYSTEMSUsually combine ‘Conduction’ AND ‘Convection’ to move heat. i.e….
- 24. Sect. 1TERMS TO REMEMBERRefrigerationHeatBoxConductionConvectionRadiation
- 25. Sect. 1HOW IS HEAT ‘MEASURED’?Four (4) Ways….TemperatureSensible HeatBritish Thermal Unit (BTU)Specific Heat
- 26. Sect. 1TEMPERATUREIs the Level or Intensity of
- 27. Sect. 1TEMPERATUREThe temperature inside the controlled space
- 28. Sect. 1SENSIBLE HEATIs Heat you ‘Can Feel’
- 29. Sect. 1BRITISH THERMAL UNITMeasure of the quantity
- 30. Sect. 1SPECIFIC HEATAmount of heat required to
- 31. Sect. 1SPECIFIC HEAT EXAMPLESWater - 1.0Aluminum -
- 32. Sect. 1TERMS TO REMEMBERTemperatureBox TemperatureAmbient TemperatureSensible HeatBtuSpecific Heat
- 33. Скачать презентацию
- 34. Похожие презентации
Sect. 1What is Refrigeration?
Слайд 3
Sect. 1
DEFINITION
‘Refrigeration’…
…is the transfer of heat from a
place where it is ‘not wanted’…
where it is ‘unobjectionable’.
Слайд 4
Sect. 1
HEAT REMOVAL
If heat is removed from inside
the container ‘faster’ than it enters...
…The internal temperature becomes
colder.
Слайд 5
Sect. 1
WHAT IS HEAT?
A Form of Energy
It Exists
‘Everywhere’
It Exists at ‘All Temperatures’…Except…
Absolute Zero (-459º F
/ -273º C)It can be Moved from ‘Place to Place’
Слайд 7
Sect. 1
‘HOW’ DOES HEAT MOVE?
Warmer ⇒ Colder -
ALWAYS!!!!!!!
Heat
Heat
Heat
‘Faster’ with Large Temp. Difference
Слайд 8
Sect. 1
‘HOW’ DOES IT MOVE?
Heat can move three
(3) ways….
1. Conduction
2. Convection
3. Radiation
Слайд 10
Sect. 1
CONDUCTION
Heat will move Between Solids and
/ or Fluids in direct contact with one another
Слайд 13
Sect. 1
CONVECTION
Definition - Heat transfers via the circulation
(movement) of a fluid. i.e…..
Air is a fluid
Refrigerant Liquid
& Vapor are fluidsTypes
‘Natural’ Convection
‘Forced’ Convection
Слайд 19
Sect. 1
RADIATION
Moves in Straight Lines… like light
Does not
heat the air it passes through
Raises temperature of the
substance that absorbs itDark colors absorb ‘more’ heat…
Light colors absorb ‘less’ heat
Слайд 23
Sect. 1
HEAT TRANSFER SYSTEMS
Usually combine ‘Conduction’ AND ‘Convection’
to move heat. i.e….
Слайд 25
Sect. 1
HOW IS HEAT ‘MEASURED’?
Four (4) Ways….
Temperature
Sensible Heat
British
Thermal Unit (BTU)
Specific Heat
Слайд 26
Sect. 1
TEMPERATURE
Is the Level or Intensity of heat
energy
Is measured in degrees
Fahrenheit or Centigrade
Can be ‘Felt’ or ‘Sensed’
Слайд 27
Sect. 1
TEMPERATURE
The temperature inside the controlled space (container)
is called….
Box Temperature
AMBIENT
AMBIENT
AMBIENT
AMBIENT
The temperature surrounding the
Container is called…
Слайд 28
Sect. 1
SENSIBLE HEAT
Is Heat you ‘Can Feel’
Is
measured with a
Thermometer
Causes a change in
Temperature
Слайд 29
Sect. 1
BRITISH THERMAL UNIT
Measure of the quantity (amount)
of heat energy
Definition: A Btu is the amount of
heat required to raise the temperature of one (1) pound of water one (1) degree F
Слайд 30
Sect. 1
SPECIFIC HEAT
Amount of heat required to raise
the temperature of one (1) pound of a ‘Specific
Substance’ one (1) degree F.Compared to Water (1.0)
The less heat required to change substance temp., the lower the Specific Heat
The more heat required to change substance temp., the higher the Specific Heat
i.e. 0.75
Слайд 31
Sect. 1
SPECIFIC HEAT EXAMPLES
Water - 1.0
Aluminum - .22
Honey
- .35
Cheese - .50
Fresh Beef - .75
Vegetables - .90
Cucumbers
& Watermelon - .97
Слайд 32
Sect. 1
TERMS TO REMEMBER
Temperature
Box Temperature
Ambient Temperature
Sensible Heat
Btu
Specific Heat
