Podcast
Questions and Answers
What is the main difference between a hot oil system and a hot water heating system?
What is the main difference between a hot oil system and a hot water heating system?
- The fluid chosen in a hot oil system has a higher boiling point than water in a hot water heating system. (correct)
- Hot oil systems have higher vapor pressure than hot water heating systems.
- Hot oil systems use water as the thermal fluid while hot water heating systems use oil.
- Hot oil systems operate at a lower temperature than hot water heating systems.
Why are heat transfer fluids like hot oils preferred in high-temperature applications?
Why are heat transfer fluids like hot oils preferred in high-temperature applications?
- Due to their low energy efficiency.
- Because they have high vapor pressure.
- As they have lower vapor pressure compared to steam. (correct)
- To maintain high pressures in the system.
What issue was faced with the original oils used in heat transfer fluids when the temperature regularly exceeded the stable temperature?
What issue was faced with the original oils used in heat transfer fluids when the temperature regularly exceeded the stable temperature?
- They maintained their stable properties.
- They had higher energy efficiency.
- They broke down as they became partially oxidized and unstable. (correct)
- They became more thermally stable.
Why are heat exchangers used in hot oil systems?
Why are heat exchangers used in hot oil systems?
How do hot oil systems compare to steam systems under jurisdictional regulations?
How do hot oil systems compare to steam systems under jurisdictional regulations?
What is a primary reason for using hot oils as heat transfer fluids over other options?
What is a primary reason for using hot oils as heat transfer fluids over other options?
Why are hot oil systems preferred over steam in many applications?
Why are hot oil systems preferred over steam in many applications?
What is the main purpose of the expansion tank in a heat transfer fluid system?
What is the main purpose of the expansion tank in a heat transfer fluid system?
Why do hot oil systems usually use centrifugal pumps?
Why do hot oil systems usually use centrifugal pumps?
What is a disadvantage of using vapor phase heat transfer systems over liquid phase systems?
What is a disadvantage of using vapor phase heat transfer systems over liquid phase systems?
Why do contaminants pose a problem in heat transfer fluid systems?
Why do contaminants pose a problem in heat transfer fluid systems?
What effect does overheating have on heat transfer fluids?
What effect does overheating have on heat transfer fluids?
What equipment allows for expansion and contraction of the hot oil in liquid thermal systems?
What equipment allows for expansion and contraction of the hot oil in liquid thermal systems?
What is the primary consideration for selecting the type of HTF (heat transfer fluid) for a process?
What is the primary consideration for selecting the type of HTF (heat transfer fluid) for a process?
What issue might arise if an expansion tank in a heat transfer system is not monitored regularly?
What issue might arise if an expansion tank in a heat transfer system is not monitored regularly?
Why are centrifugal pumps preferred over gear pumps in liquid thermal systems?
Why are centrifugal pumps preferred over gear pumps in liquid thermal systems?
What type of pump is commonly used in liquid thermal systems?
What type of pump is commonly used in liquid thermal systems?
Why are the circulating pumps in liquid thermal systems often water-cooled?
Why are the circulating pumps in liquid thermal systems often water-cooled?
What is the major equipment in liquid thermal systems that supplies the distribution system?
What is the major equipment in liquid thermal systems that supplies the distribution system?
What is the consequence of not cleaning the system and removing all traces of old heat transfer fluid before recharging with fresh fluid?
What is the consequence of not cleaning the system and removing all traces of old heat transfer fluid before recharging with fresh fluid?
In heat transfer fluid systems, what is a potential hazard associated with leaks at high temperatures?
In heat transfer fluid systems, what is a potential hazard associated with leaks at high temperatures?
Why are centrifugal pumps preferred in liquid thermal systems over gear pumps?
Why are centrifugal pumps preferred in liquid thermal systems over gear pumps?
What is the typical efficiency range for radiant heaters used in heat transfer fluid systems?
What is the typical efficiency range for radiant heaters used in heat transfer fluid systems?
What is a key advantage of convection heaters over radiant heaters in HTF systems?
What is a key advantage of convection heaters over radiant heaters in HTF systems?
Why are combination radiant and convection heaters commonly applied in larger units?
Why are combination radiant and convection heaters commonly applied in larger units?
In a typical up-draft fired heater design, where are the convection tube sections usually located?
In a typical up-draft fired heater design, where are the convection tube sections usually located?
How are gas burners typically positioned in a horizontal rectangular heater in a direct heater design?
How are gas burners typically positioned in a horizontal rectangular heater in a direct heater design?
What is the purpose of having a concrete dike surrounding the foundation of the fired heater?
What is the purpose of having a concrete dike surrounding the foundation of the fired heater?
Why are protective devices necessary in a hot oil system?
Why are protective devices necessary in a hot oil system?
What does a low hot oil flow indicating device aim to prevent?
What does a low hot oil flow indicating device aim to prevent?
Why is it recommended to keep the expansion tank level between 2⁄3 and 3⁄4 full?
Why is it recommended to keep the expansion tank level between 2⁄3 and 3⁄4 full?
What is the purpose of having an emergency shutdown device/switch in a hot oil system?
What is the purpose of having an emergency shutdown device/switch 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 happens if the expansion tank level is too high in a hot oil system?
What happens if the expansion tank level is too high in a hot oil system?
Why should a small amount of hot oil flow backwards through the standby pump in a hot oil system?
Why should a small amount of hot oil flow backwards through the standby pump in a hot oil system?
What is the function of a high stack temperature indicator in a hot oil system?
What is the function of a high stack temperature indicator in a hot oil system?
Why is a pressure/safety relief valve placed downstream of the heater in a hot oil system?
Why is a pressure/safety relief valve placed downstream of the heater in a hot oil system?
