Podcast
Questions and Answers
What is the fundamental difference between a hot oil system and a hot water heating system?
What is the fundamental difference between a hot oil system and a hot water heating system?
- The system runs at a higher temperature in a hot oil system.
- The system runs at a lower temperature in a hot oil system.
- The fluid chosen has a lower boiling point in a hot oil system.
- The fluid chosen has a higher boiling point in a hot oil system. (correct)
Why are heat transfer fluids, like hot oils, preferred in high temperature process applications?
Why are heat transfer fluids, like hot oils, preferred in high temperature process applications?
- They exhibit thermally stable properties at high temperatures. (correct)
- They have lower heat transfer rates than steam.
- They offer low energy efficiency.
- They have high vapor pressure compared to steam.
What was a common issue with the original oils used in heat transfer systems?
What was a common issue with the original oils used in heat transfer systems?
- They had high vapor pressure.
- They had very low-energy efficiency.
- They were highly resistant to thermal breakdown.
- They were unstable at temperatures above the rated stable temperature. (correct)
How do heat exchangers contribute to a hot oil system's operation?
How do heat exchangers contribute to a hot oil system's operation?
Why are heat transfer fluids, especially hot oils, used in metal working applications?
Why are heat transfer fluids, especially hot oils, used in metal working applications?
In jurisdictional regulations, why might systems employing heat transfer fluids be registered at a lower level?
In jurisdictional regulations, why might systems employing heat transfer fluids be registered at a lower level?
Why should the pump be located below the expansion tank?
Why should the pump be located below the expansion tank?
Why are centrifugal pumps preferred over gear pumps in liquid thermal systems?
Why are centrifugal pumps preferred over gear pumps in liquid thermal systems?
Why are circulating pumps in thermal fluid systems often water-cooled?
Why are circulating pumps in thermal fluid systems often water-cooled?
What is a common auxiliary equipment found in liquid thermal systems?
What is a common auxiliary equipment found in liquid thermal systems?
Which major equipment is central to the return system in liquid thermal systems?
Which major equipment is central to the return system in liquid thermal systems?
What hazard is posed by exposed piping systems in heat transfer fluid systems?
What hazard is posed by exposed piping systems in heat transfer fluid systems?
Which pump type is preferred for liquid thermal systems in terms of enhancing heat transfer?
Which pump type is preferred for liquid thermal systems in terms of enhancing heat transfer?
What is the efficiency range of radiant heaters used in heat transfer fluid (HTF) systems?
What is the efficiency range of radiant heaters used in heat transfer fluid (HTF) systems?
What is the primary function of the expansion tank in liquid thermal systems?
What is the primary function of the expansion tank in liquid thermal systems?
What is the main advantage of using a combination radiant and convection heater in heat transfer fluid systems?
What is the main advantage of using a combination radiant and convection heater in heat transfer fluid systems?
What is the purpose of lining the inner walls and floor of a fired heater with refractory brick and insulating material?
What is the purpose of lining the inner walls and floor of a fired heater with refractory brick and insulating material?
Why are leaks from heat transfer fluid systems considered hazardous?
Why are leaks from heat transfer fluid systems considered hazardous?
What is the main advantage of using current HTFs over steam in heat transfer systems?
What is the main advantage of using current HTFs over steam in heat transfer systems?
In a vapour-based heat transfer system, what is the role of the saturated gas?
In a vapour-based heat transfer system, what is the role of the saturated gas?
Why are liquid thermal systems preferred over vapour systems in some cases?
Why are liquid thermal systems preferred over vapour systems in some cases?
What is the purpose of the expansion tank in a heat transfer system?
What is the purpose of the expansion tank in a heat transfer system?
In liquid thermal systems, why are centrifugal pumps preferred over gear pumps?
In liquid thermal systems, why are centrifugal pumps preferred over gear pumps?
What is the main drawback of using vapour-based heat transfer systems?
What is the main drawback of using vapour-based heat transfer systems?
What happens if the expansion tank level drops in a heat transfer system?
What happens if the expansion tank level drops in a heat transfer system?
How can contaminants typically impact heat transfer in a system?
How can contaminants typically impact heat transfer in a system?
"What can happen if cleaning fluids are left in a heat transfer system at startup?"
"What can happen if cleaning fluids are left in a heat transfer system at startup?"
"Why is it important to monitor the level of the expansion tank daily?"
"Why is it important to monitor the level of the expansion tank daily?"
What is the main purpose of an expansion (or surge) tank in a hot oil system?
What is the main purpose of an expansion (or surge) tank in a hot oil system?
Why is a low hot oil flow indicating device installed in the outlet line from the heater?
Why is a low hot oil flow indicating device installed in the outlet line from the heater?
What is the purpose of a high stack temperature indicator in a hot oil system?
What is the purpose of a high stack temperature indicator in a hot oil system?
What does the emergency shutdown device/switch in a hot oil system allow operators to do?
What does the emergency shutdown device/switch in a hot oil system allow operators to do?
Why is it recommended to leave the standby pump's suction valve open all the time in a hot oil system?
Why is it recommended to leave the standby pump's suction valve open all the time in a hot oil system?
What purpose does a pressure/safety relief valve serve in a hot oil system?
What purpose does a pressure/safety relief valve serve in a hot oil system?
Why are two pumps usually installed in a hot oil system?
Why are two pumps usually installed in a hot oil system?
What is the purpose of a high or low fuel level/pressure shutdown device in a hot oil system?
What is the purpose of a high or low fuel level/pressure shutdown device in a hot oil system?
What is meant by having an expansion tank 'feed' the system in case of a leak?
What is meant by having an expansion tank 'feed' the system in case of a leak?
Why should the temperature in the expansion tank be less than 60°C?
Why should the temperature in the expansion tank be less than 60°C?
