Room Cooling Control for Condensation-Safe Piping Cavities
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Solution Overview
Problem
Existing cooling systems are inadequate for buildings with high internal inertia of temperature and humidity compensation, particularly older houses with wooden structures, as they fail to prevent condensation and moisture-related damage from relative humidity fluctuations along the coolant piping paths.
Innovation Solution
The system incorporates humidity sensors near the coolant piping in addition to the room, a control unit that processes humidity and temperature data to set a flow temperature preventing maximum permissible air humidity from being exceeded, and a mixing device to adjust the cooling medium temperature, ensuring relative humidity remains within safe limits throughout the piping path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cooling is intensified to reach the desired room temperature faster, then cooling efficiency is improved, but relative humidity in cavities and along piping paths increases excessively, causing condensation and moisture damage
Solution Approach 1:
The system performs preliminary monitoring of humidity conditions in cavities and piping areas before condensation occurs. The control device receives humidity sensor signals and proactively adjusts the flow temperature to prevent condensation, rather than reacting after damage has occurred. This allows the system to maintain higher cooling efficiency while preventing moisture damage through advance intervention.
Solution Approach 2:
The system implements continuous feedback through humidity sensors positioned in cavities and along piping paths. These sensors constantly monitor relative humidity and feed this information back to the control device, which dynamically adjusts the flow temperature to maintain humidity below the dew point. This closed-loop control enables the system to optimize cooling efficiency while preventing condensation by responding to real-time humidity conditions.
2Reliability
If flow temperature is increased to prevent condensation in cavities, then moisture protection is improved, but cooling performance and ability to reach desired temperature decreases
Solution Approach 1:
The system applies different temperature control strategies to different locations. In cavities and piping areas, the flow temperature is maintained high enough to prevent condensation. In the actual room being cooled, the system achieves the desired low temperature through efficient heat exchange at the cooling surfaces. This localized quality approach allows the system to protect against moisture damage while maintaining cooling performance.
Solution Approach 2:
The system segments the building into different thermal zones: the cooled room space and the insulation cavities/piping areas. By monitoring humidity separately in cavities and controlling flow temperature based on cavity conditions rather than room conditions, the system can maintain protective temperatures in cavities while achieving effective cooling in the room through the cooling surfaces.
3Reliability
If humidity monitoring is extended to multiple cavities and piping areas, then moisture protection coverage is improved, but system complexity and number of sensors increases
Solution Approach 1:
The system segments the monitoring function by placing simple humidity sensors at key locations in cavities and along piping paths where condensation is most likely to occur. Rather than comprehensive monitoring of every space, sensors are strategically positioned in the most critical areas, providing adequate protection coverage while minimizing the total number of sensors required.
Solution Approach 2:
The control device acts as an intermediary that receives signals from multiple humidity sensors and processes this information to determine the appropriate flow temperature. This centralized control approach simplifies the system architecture by consolidating the intelligence in the control device rather than requiring complex distributed control at each sensor location, thereby reducing overall system complexity while maintaining comprehensive monitoring coverage.
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 solution effectively prevents condensation and moisture-related damage to building structures by maintaining safe relative humidity levels, even in areas with low air exchange, allowing for reliable protection of wood and other organic materials from moisture-related issues.
Implementation Method 1
at least one mixing device (5) on the flow line (12) for mixing the cooling media from the reservoirs (4, 8)
Implementation Method 2
Cooling surfaces in buildings are usually arranged in or on walls, ceilings or floors. They have supply lines that transport the cooling medium to the cooling surfaces
Implementation Method 3
To avoid condensation of water, cooling is interrupted when the temperature falls below the dew point
Data Source
Figure 1
AI summary
This document presents an arrangement for cooling rooms in buildings with a high inertia in temperature and humidity equalization. This arrangement monitors the temperature and relative humidity in the room to be cooled, as well as in the spaces or cavities through which the cooling system's piping runs. By adjusting the supply temperature, both condensation and the occurrence of relative humidity levels critical to the building structure are prevented.