Compressor Speed Control for Thermal Management
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Solution Overview
Problem
Conventional compressor devices are not optimally utilized at nominal conditions when environmental temperatures exceed design limits, leading to unpredictable stoppages and performance loss, as they require overdimensioning or fixed speed reduction, resulting in inefficiency and increased costs.
Innovation Solution
A compressor device with a self-regulating control system that adjusts the compressor's maximum revolutions based on environmental temperature, using an algorithm to reduce speed when temperatures rise and increase when they fall, ensuring optimal cooling and performance across varying environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the compressor device is overdimensionised to handle higher environmental temperatures, then the compressor can operate in elevated temperatures without stoppages, but the investment cost increases and the compressor is not optimally utilized under nominal conditions
Solution Approach 1:
The patent implements dynamic adjustment of the maximum revolutions parameter based on environmental temperature conditions. The control system continuously monitors temperature and dynamically modifies the compressor's operational parameters, transitioning from static overdimensioning to adaptive operation that matches actual thermal conditions, thereby resolving the contradiction between reliability in hot conditions and productivity in nominal conditions
Solution Approach 2:
The invention changes the operational parameters (maximum revolutions) as a function of environmental temperature. By adjusting this critical parameter based on thermal conditions, the system achieves both reliable operation in elevated temperatures and optimal utilization during nominal conditions, eliminating the need for permanent overdimensioning
2Temperature
If the fixed set maximum number of revolutions is limited to create thermal reserve, then the compressor can counteract higher environmental temperature, but the compressor device requires bigger investment and is not optimally utilized under nominal conditions
Solution Approach 1:
The system dynamically adjusts the maximum revolutions parameter based on real-time environmental temperature monitoring. Instead of maintaining a permanently reduced speed setting to create thermal reserve, the control system activates thermal reserve capacity only when environmental temperature exceeds nominal levels, thereby reducing device complexity and investment while maintaining temperature management capability
Solution Approach 2:
The compressor device monitors its own thermal conditions and automatically adjusts its operational parameters to maintain optimal thermal reserve. The control system uses temperature sensors and algorithms to self-regulate the maximum revolutions, eliminating the need for manual configuration or oversized hardware design
3Productivity
If the compressor operates at maximum capacity in elevated environmental temperatures, then the cooling capacity must be sufficient to prevent overheating, but the cooling system may become insufficient leading to unwanted stoppages
Solution Approach 1:
The patent implements a feedback control mechanism where the actual environmental temperature is continuously measured and compared against nominal conditions. Based on this feedback, the control system dynamically adjusts the maximum revolutions parameter to ensure that the cooling system remains sufficient even when operating at maximum capacity in elevated temperatures, preventing overheating and unwanted stoppages
Solution Approach 2:
The control system takes preliminary action by adjusting the maximum revolutions parameter before thermal overload occurs. When environmental temperature rises above nominal levels, the system proactively reduces the maximum allowed speed to prevent the cooling system from becoming insufficient, thereby maintaining both productivity and reliability
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
The compressor device operates at maximum capacity and efficiency in all environmental temperatures, preventing overheating and stoppages, while minimizing energy costs and maintaining optimal cooling, even in elevated temperatures, without the need for overdimensioning.
Implementation Method 1
a compressor element (6) inside which is powered by a variable speed motor (7) with a control box (8) having a set maximum number of revolutions (Nmax) for the compressor element
Implementation Method 2
an air cooling (10) which sucks environmental air via an inlet (11) and blows it back to the environment through the case (2) of the compressor element (6) and via an exhaust (12)
Implementation Method 3
a cooling circuit (13) for the cooling of the gas which has been compressed by the compressor element (6)
Data Source
Figure 1~3
AI summary
Improved compressor device which mainly consists of a case (2) containing a compressor element (6) that is powered by a variable speed motor (7) with a control box (8) with a set maximum number of revolutions (Nmax)for the compressor element (6), an air cooling (10) which suck air from the environment via an inlet (11) and blows it back to the environment through the case (2) and via an exhaust (12) and a cooling circuit (13) for the cooling of the gas which has been compressed by the compressor element (6), characterized in that the control box (8) is equipped with an algorithm (24) that reduces the abovementioned maximum allowed set number of revolutions (Nmax) to a defined level as soon as the monitored environmental temperature (T20) rises above a maximum set level (Tmax) , and the maximum allowed set number of revolutions (Nmax) again rises as soon as the environmental temperature (T20) falls below the above mentioned level (Tmax) .