Podcast
Questions and Answers
What is a fundamental difference between a hot oil system and a hot water heating system?
What is a fundamental difference between a hot oil system and a hot water heating system?
- Hot oil systems use a fluid with a higher boiling point than water. (correct)
- Hot oil systems require higher pressures for operation.
- Hot oil systems use internal coils for heat transfer.
- Hot oil systems are registered at a higher level than steam systems.
Why are heat transfer fluids (HTF) preferred in high temperature process applications?
Why are heat transfer fluids (HTF) preferred in high temperature process applications?
- To operate at higher pressures for efficiency.
- To achieve rapid cooling in the system.
- To avoid regular breakdown due to high temperatures.
- To exhibit lower vapor pressure than steam. (correct)
What led to the breakdown of the original oils used in heat transfer systems?
What led to the breakdown of the original oils used in heat transfer systems?
- Frequent changes in the pump circulation speed.
- Low energy efficiency compared to steam systems.
- Excessive use of heat exchangers in the system.
- Regular exposure to high temperatures above their stability range. (correct)
In what type of applications are heat transfer fluids (HTF) mainly used?
In what type of applications are heat transfer fluids (HTF) mainly used?
How do hot oil systems create and maintain the required circulation of oil?
How do hot oil systems create and maintain the required circulation of oil?
Why might hot oil systems be registered at a lower level than equivalent operational steam systems under jurisdictional regulations?
Why might hot oil systems be registered at a lower level than equivalent operational steam systems under jurisdictional regulations?
Why is it important for the pump to be located sufficiently below the expansion tank?
Why is it important for the pump to be located sufficiently 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 liquid thermal systems often water-cooled?
Why are circulating pumps in liquid thermal systems often water-cooled?
What is a common purpose of auxiliary equipment like piping, valves, and pumps in liquid thermal systems?
What is a common purpose of auxiliary equipment like piping, valves, and pumps in liquid thermal systems?
Which major equipment is central to the return system of liquid thermal systems?
Which major equipment is central to the return system of liquid thermal systems?
What is one key advantage of using heat transfer fluids (HTFs) over steam?
What is one key advantage of using heat transfer fluids (HTFs) over steam?
In a vapor-based heat transfer system, what is the role of the saturated gas?
In a vapor-based heat transfer system, what is the role of the saturated gas?
What is the purpose of the expansion tank in a heat transfer fluid system?
What is the purpose of the expansion tank in a heat transfer fluid system?
Why are centrifugal pumps typically preferred in liquid thermal systems?
Why are centrifugal pumps typically preferred in liquid thermal systems?
What is the main issue caused by overheating and contamination of heat transfer fluids?
What is the main issue caused by overheating and contamination of heat transfer fluids?
Why do heat transfer fluids degrade over time in elevated temperatures?
Why do heat transfer fluids degrade over time in elevated temperatures?
What is the main function of the condensed HTF in a vapor phase heat transfer system?
What is the main function of the condensed HTF in a vapor phase heat transfer system?
Why are liquid-based heat transfer systems less expensive than vapor-based systems?
Why are liquid-based heat transfer systems less expensive than vapor-based systems?
What factor influences the choice of HTF for a process requiring high temperatures?
What factor influences the choice of HTF for a process requiring high temperatures?
Why is monitoring the level of the expansion tank important in a thermal fluid system?
Why is monitoring the level of the expansion tank important in a thermal fluid system?
Why is it important to remove all traces of old fluid before recharging with fresh fluid in heat transfer systems?
Why is it important to remove all traces of old fluid before recharging with fresh fluid in heat transfer systems?
What hazard is associated with leaks from a heat transfer fluid system?
What hazard is associated with leaks from a heat transfer fluid system?
Why are centrifugal pumps preferred over gear pumps in heat transfer fluid systems?
Why are centrifugal pumps preferred over gear pumps in heat transfer fluid systems?
What is the efficiency range of radiant heaters commonly used in heat transfer fluid systems?
What is the efficiency range of radiant heaters commonly used in heat transfer fluid systems?
Which section of a typical fired heater design contains the combustion gases flowing across the tubes?
Which section of a typical fired heater design contains the combustion gases flowing across the tubes?
What purpose does the refractory brick serve in a fired heater design?
What purpose does the refractory brick serve in a fired heater design?
What potential hazard is introduced by using a hydrocarbon fluid in a heat transfer system?
What potential hazard is introduced by using a hydrocarbon fluid in a heat transfer system?
Why is it crucial for liquid thermal systems to have an expansion tank?
Why is it crucial for liquid thermal systems to have an expansion tank?
What is the purpose of having both radiant and convection tube sections in a fired heater design?
What is the purpose of having both radiant and convection tube sections in a fired heater design?
Why are most heat transfer fluid systems operated above the flashpoints of the fluids used?
Why are most heat transfer fluid systems operated above the flashpoints of the fluids used?
Why are hot oil systems provided with automatic shutdown devices or 'interlocks'?
Why are hot oil systems provided with automatic shutdown devices or 'interlocks'?
What is the function of a low hot oil flow indicating device in a hot oil system?
What is the function of a low hot oil flow indicating device in a hot oil system?
Why is it important to monitor the expansion tank level daily in a hot oil system?
Why is it important to monitor the expansion tank level daily in a hot oil system?
What is the function of having two hot oil pumps with one operating and the other on standby?
What is the function of having two hot oil pumps with one operating and the other on standby?
Why is it recommended to leave the suction valve of the standby pump open all the time?
Why is it recommended to leave the suction valve of the standby pump open all the time?
What is the purpose of a burner flame failure device in a hot oil system?
What is the purpose of a burner flame failure device in a hot oil system?
Why is it essential for a pressure/safety relief valve to be located downstream of the heater?
Why is it essential for a pressure/safety relief valve to be located downstream of the heater?
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?
