Galley Air Conditioning System for Rail Vehicles
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Solution Overview
Problem
Rail vehicle galleys experience significant heating due to limited performance of vehicle air conditioning systems, especially during summer, leading to temperatures over 30°C, without the practicality of installing a separate secondary air conditioning system due to space and cost constraints.
Innovation Solution
Integration of a galley air conditioning system that utilizes the existing vehicle air conditioning system and galley refrigeration system, incorporating a circulating air cooling circuit with a heat exchanger and fans to enhance cooling efficiency within the galley, without requiring additional space or cost, by leveraging the coolant supply from the galley refrigeration system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a separate secondary air conditioning system is installed for the galley, then the climate control of the galley is improved, but the space requirements and cost increase significantly
Solution Approach 1:
The patent merges the galley air conditioning function with the existing vehicle air conditioning system by connecting the galley to the vehicle's air conditioning unit through a dedicated connection. This allows the galley to benefit from the vehicle's air conditioning capacity without requiring a completely separate system, thereby improving temperature control while avoiding the space and cost penalties of a fully independent secondary system.
Solution Approach 2:
The vehicle's air conditioning system is designed to serve multiple functions: it cools both the passenger compartments and the galley simultaneously. The system uses a single refrigerant circuit that can distribute cooled air to different zones, making the air conditioning system universal and eliminating the need for separate dedicated systems for each zone.
2Temperature
If the vehicle's air conditioning system capacity is increased to cool the galley, then the galley temperature is reduced, but the system cost and complexity increase
Solution Approach 1:
The air conditioning system is segmented into distinct functional zones: passenger compartments and galley. Each zone has its own air handling connection, allowing independent control and optimization. The galley connection is designed as a separate interface that taps into the existing vehicle air conditioning system, enabling targeted cooling without over-engineering the entire system.
Solution Approach 2:
The vehicle's air conditioning system is designed with excess capacity that can be partially allocated to the galley. Rather than designing a completely separate system for the galley, the patent utilizes the unused or underutilized capacity of the vehicle's existing air conditioning system, thereby achieving galley cooling without proportionally increasing system complexity or cost.
3Temperature
If a separate galley air conditioning system is installed, then the climate control is improved, but the installation cost increases significantly
Solution Approach 1:
The patent combines the galley air conditioning requirement with the vehicle's existing air conditioning infrastructure. By sharing the refrigerant circuit, compressors, and control systems, the solution achieves dedicated galley cooling at a fraction of the cost of a completely separate system, thereby improving temperature control while maintaining cost-effectiveness.
Solution Approach 2:
The vehicle's air conditioning system serves itself by simultaneously cooling both the passenger areas and the galley through a unified system architecture. The system uses its own existing components and refrigerant circulation to provide additional cooling capacity to the galley, eliminating the need for separate dedicated equipment and reducing overall installation costs.
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 reduces galley temperatures, improving working conditions for staff by utilizing existing cooling capacity, reducing the need for a standalone secondary air conditioning system and minimizing space and cost impacts.
Implementation Method 1
an additional cooling circuit operating as recirculating air cooling can be connected to the existing galley refrigeration system to form the galley air conditioning system
Implementation Method 2
the recirculating air cooling system comprises an air duct, a heat exchanger arranged within the air duct, and a fan arranged within the air duct
Data Source
AI summary
The invention relates to a galley (2) for a vehicle (1), which galley comprises a connection point (4) for thermally connecting the galley (2) to a vehicle air conditioning system (3) of the vehicle (1). The galley (2) also comprises: a galley refrigeration system (9) for supplying local cooling points (7, 8) in the galley (2); and a galley air conditioning system (10), which is separated from the vehicle air conditioning system (3). The galley air conditioning system (10) is supplied with coolant by the galley refrigeration system (9). The invention further relates to a vehicle (1), in particular a rail vehicle, having a galley (2) according to the invention.