Heating Unit with Manifold Orifices for Petrochemical Enclosures
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Solution Overview
Problem
Enclosure heaters in petrochemical plants face limitations in maintaining surface temperatures below a predetermined maximum due to safety regulations, while requiring effective heat transfer to maintain fluid streams at desired temperatures.
Innovation Solution
The design incorporates a heating unit with a base, a heat sink, and a manifold, utilizing positive temperature coefficient (PTC) heaters and a flow passage system with orifices aligned with channels between fins, allowing for efficient thermal energy transfer while maintaining surface temperatures below the maximum permissible limit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the heater surface temperature is increased to improve heat transfer efficiency, then the heating effectiveness improves, but the surface temperature exceeds the predetermined maximum temperature limit imposed by safety regulations
Solution Approach 1:
The heating element is segmented into multiple sections with independent temperature control capabilities. The heater includes a first section and a second section, each capable of being controlled at different temperature levels, allowing the overall heating effectiveness to be maintained while individual surface temperatures remain within safe limits
Solution Approach 2:
The invention transitions from controlling a single surface temperature to managing temperature distribution across multiple spatial dimensions. By creating a three-dimensional temperature gradient within the heater structure, the system achieves effective heat transfer without any single surface point exceeding the maximum temperature limit
2Reliability
If the heater surface temperature is limited to maintain safety compliance, then hazardous area safety is ensured, but the heat transfer efficiency to the fluid stream decreases
Solution Approach 1:
The invention introduces a fluid circulation system that flows through channels within the heater structure. This hydraulic approach enhances heat transfer efficiency by continuously moving the heated fluid through the heating zones, maximizing thermal energy transfer while maintaining surface temperatures within safe limits
Solution Approach 2:
The system changes the thermal parameters by implementing variable temperature zones and controlled thermal gradients. By adjusting temperature parameters at different locations and depths within the heater, the system achieves optimal heat transfer efficiency while maintaining surface temperature compliance with safety regulations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration maximizes heat transfer to the fluid stream while ensuring surface temperatures remain below regulatory limits, enhancing the reliability and efficiency of heating processes in petrochemical applications.
Implementation Method 1
a first heater disposed in the cavity of the first base... a positive temperature coefficient (PTC) heater disposed in the cavity of the base... configured to conductively transfer thermal energy to the base
Implementation Method 2
The base is configured to conductively transfer thermal energy to the heat sink... the first heat sink includes a plurality of laterally spaced fins and a plurality of laterally spaced channels
Implementation Method 3
The first flow passage and the first plurality of orifices are configured to flow a fluid into and through the channels of the first heat sink... flowing a fluid into and through the channels of the first heat sink along the plurality of fins
Data Source
AI summary
A heating unit for heating an enclosure includes a base having a central axis, a first end, a second end axially opposite the first end, and a cavity extending axially from the first end. In addition, the heating unit includes a heater disposed in the cavity of the base. Further, the heating unit includes a heat sink mounted to the base. The heat sink includes a plurality of laterally spaced fins and a plurality of laterally spaced channels positioned between the plurality of fins. Still further, the heating unit includes a manifold coupled to the base. A surface of the manifold faces the base and the heat sink. The manifold includes a flow passage and a plurality of orifices in fluid communication with the flow passage. Each orifice has an outlet at the surface of the manifold that is aligned with one of the channels of the first heat sink.