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Electronic Expansion Valve for 24kW Bus Heat Pump HVAC Systems
Overview
The Electronic Expansion Valve (EEV) is a critical component in modern 24kW bus heat pump air conditioning systems, enabling precise refrigerant flow control to optimize heating and cooling performance. Unlike traditional thermostatic expansion valves (TXVs), EEVs utilize electronic feedback from temperature and pressure sensors to dynamically adjust valve opening, ensuring maximum energy efficiency, rapid cabin temperature response, and stable operation under varying ambient conditions—essential for electric and hybrid city buses.
Designed specifically for heavy-duty mobile HVAC applications, the EEV used in 24kW bus heat pumps supports both heating and cooling modes with high reliability, even in extreme climates ranging from -30°C to +55°C. Its integration with the vehicle's thermal management system allows seamless coordination with compressors, fans, and other actuators for intelligent climate control.
Key Features & Benefits
Precise Refrigerant Control: Modulates refrigerant flow in real time based on superheat or subcooling data, improving COP (Coefficient of Performance) by up to 15-20% compared to fixed-orifice devices.
Bidirectional Operation: Supports reversible heat pump cycles without requiring additional valves—ideal for all-season bus HVAC systems.
Fast Response Time: Reacts within milliseconds to load changes, maintaining consistent cabin comfort during frequent stops and starts typical in urban transit.
Durability & Vibration Resistance: Built with robust materials (e.g., stainless steel valve body, ceramic-coated needle) to withstand road vibrations, thermal cycling, and long service life (>100,000 cycles).
Compatibility: Works with common low-GWP refrigerants such as R134a, R407C, and increasingly R744 (CO₂) in next-gen systems.
Retrofit projects upgrading from conventional AC to efficient heat pump systems
Cold-climate public transport fleets requiring reliable defrost and heating performance
Industry Context
According to SAE International and recent studies by the International Council on Clean Transportation (ICCT), heat pump adoption in electric buses can reduce winter energy consumption by 30-50% compared to resistive heating. The EEV is central to this efficiency gain, as highlighted in technical white papers from leading automotive thermal suppliers like Denso, Valeo, and Mahle. Modern bus HVAC architectures increasingly rely on EEVs for their ability to maintain optimal superheat across wide operating envelopes—a necessity for battery-electric vehicles where every kWh counts.
For integration support, calibration protocols, or custom configuration for your 24kW bus heat pump platform, contact our engineering team for OEM/ODM solutions compliant with ISO/TS 16949 and E-Mark certification standards.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2007
Total Annual:
30000000-50000000
Employee Number:
200~300
Ecer Certification：
Verified Supplier
NEWBASE was established in 2007, esteemed as a national specialized new small giant enterprise by the Ministry of Industry and Information Technology.
Our headquarters are situated in Zhengzhou City, and we have strategically established three R & D and production bases: Zhengzhou ... NEWBASE was established in 2007, esteemed as a national specialized new small giant enterprise by the Ministry of Industry and Information Technology.
Our headquarters are situated in Zhengzhou City, and we have strategically established three R & D and production bases: Zhengzhou ...
