Features and

Refrigeration

Benefits

Cycle (Cont.)

 

 

 

 

Three-Stage CenTraVac P-H Diagram

CenTraVacThree-Stage P-H Diagram The pressure-enthalphy(P-H) diagram describes refrigerant flow through the major CVHE/CVHG chiller components. This diagram confirms the superior operating cycle efficiency of the three- stage compressor and two-stage economizer.

Evaporator — A liquid-gas refrigerant mixture enters the evaporator at state point 1. Liquid refrigerant is vaporized to state point 2 as it absorbs heat from the system cooling load. The vaporized refrigerant then flows into the compressor first stage.

Compressor First Stage — Refrigerant gas is drawn from the evaporator into the first stage compressor. The first stage impeller accelerates the gas increasing its temperature and pressure to state point 3.

Compressor Second Stage — Refrigerant gas leaving the first stage compressor is mixed with cooler refrigerant gas from the low pressure side of the two-stage economizer. This mixing lowers the enthalpy of the mixture entering the second stage. The second stage impeller accelerates the gas, further increasing its temperature and pressure to state point 4.

Compressor Third Stage — Refrigerant gas leaving the compressor second stage is mixed with cooler refrigerant gas from the high pressure side of the two-stage economizer. This mixing lowers the enthalpy of the gas mixture entering the third stage compressor. The third stage impeller accelerates the gas,

further increasing its temperature and pressure to state point 5, then discharges it to the condenser.

Condenser — Refrigerant gas enters the condenser where the system cooling load and heat of compression are rejected to the condenser water circuit. This heat rejection cools and condenses the refrigerant gas to a liquid at state point 6.

Patented Two-Stage Economizer and Refrigerant Orifice System-Liquid refrigerant leaving the condenser at state point 6 flows through the first orifice and enters the high pressure side of the economizer. The purpose of this orifice and economizer is to preflash a small amount of refrigerant at an intermediate pressure called P1. P1 is between the evaporator and condenser pressures. Preflashing some liquid refrigerant cools the remaining liquid to state point 7.

Refrigerant leaving the first stage economizer flows through the second orifice and enters the second stage economizer. Some refrigerant is preflashed at intermediate pressure P2. Preflashing the liquid refrigerant cools the remaining liquid to state point 8.

Another benefit of preflashing refrigerant is to increase the total evaporator refrigeration effect from RE’ to RE. The two-stage economizer provides a seven percent energy savings compared to chillers with no economizer.

To complete the operating cycle, liquid refrigerant leaving the economizer at state point 8 flows through a third orifice system. Here, refrigerant pressure and temperature are reduced to evaporator conditions at state point 1.

Two-Stage CenTraVac P-H Diagram

CenTraVac Two-Stage P-H Diagram The pressure-enthalphy(P-H) diagram describes refrigerant flow through the major CVHF chiller components. This diagram confirms the superior operating cycle efficiency of the two- stage compressor and economizer.

Evaporator — A liquid-gas refrigerant mixture enters the evaporator at state point 1. Liquid refrigerant is vaporized to state point 2 as it absorbs heat from the system cooling load. The vaporized refrigerant then flows into the compressor first stage.

Compressor First Stage — Refrigerant gas is drawn from the evaporator into the first stage compressor. The first stage impeller accelerates the gas increasing its temperature and pressure to state point 3.

Compressor Second Stage — Refrigerant gas leaving the first stage compressor is mixed with cooler refrigerant gas from the economizer. This mixing lowers the enthalpy of the mixture entering the second stage. The second stage impeller accelerates the gas, further increasing its temperature and pressure to state point 4.

Condenser — Refrigerant gas enters the condenser where the system cooling load and heat of compression are rejected to the condenser water circuit. This heat rejection cools and condenses the refrigerant gas to a liquid at state point 6.

Economizer and Refrigerant Orifice System-Liquid refrigerant leaving the condenser at state point 6 flows through the first orifice and enters the economizer. The purpose of this orifice and economizer is to preflash a small amount of refrigerant at an intermediate pressure called P1. P1 is between the evaporator and condenser pressures. Preflashing some liquid refrigerant cools the remaining liquid to state point 8.

Another benefit of flashing refrigerant is to increase the total evaporator refrigeration effect from RE’ to RE. The economizer provides a 41/2 percent energy savings compared to chillers with no economizer. To complete the operating cycle, liquid refrigerant leaving the economizer at state point 8 flows through a second orifice system. Here, refrigerant pressure and temperature are reduced to evaporator conditions at state point 1.

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CTV-PRC007-EN

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Trane ctv-prc007-en manual Two-Stage CenTraVac P-H Diagram

ctv-prc007-en specifications

The Trane CTV-PRC007-EN is an advanced air conditioning unit that epitomizes efficiency and reliability in temperature control. Designed for commercial and industrial applications, this unit stands out with a multitude of features aimed at enhancing performance, energy savings, and sustainability.

One of the key characteristics of the CTV-PRC007-EN is its high cooling and heating capacities, allowing it to cater to a variety of environments. The unit utilizes a scroll compressor, known for its energy efficiency and durable design, which contributes to substantial energy savings over time. The inclusion of variable speed technology further optimizes energy use by adjusting to the specific cooling or heating demands of the space.

Equipped with Trane’s proprietary Sintesis technology, the CTV-PRC007-EN offers superior temperature control while minimizing noise levels. This feature makes it ideal for settings where quiet operation is essential, such as offices, hotels, and conference rooms. The unit’s sound-dampening design reduces operational noise, ensuring a comfortable environment for occupants.

Another significant advantage of the CTV-PRC007-EN is its advanced control system. The integration of Smart Temperature Management allows for precise monitoring and adjustment, enhancing the overall user experience. Additionally, the system is compatible with various building management systems, enabling remote monitoring and control, which can significantly reduce operational costs and improve efficiency.

The CTV-PRC007-EN also embraces eco-friendly refrigerants, aligning with global sustainability goals. By using refrigerants with low global warming potential, Trane demonstrates its commitment to reducing environmental impact while maintaining high performance.

Maintenance is straightforward with the CTV-PRC007-EN. The unit's robust design includes accessible components that simplify servicing, helping to minimize downtime and operational costs. It comes with a comprehensive warranty, underscoring Trane’s confidence in the durability and reliability of its products.

In conclusion, the Trane CTV-PRC007-EN stands as a testament to cutting-edge technology in HVAC solutions. With its energy efficiency, advanced control systems, quiet operation, and eco-friendly features, it is an ideal choice for businesses seeking effective climate control solutions that do not compromise on sustainability or performance.