Does a condenser lower pressure?

Does a condenser lower pressure?

Temperature profile inside the condenser In a similar way to evaporation, the only pressure difference between the entrance and the exit of the heat exchanger is the pressure drop. Because the flow velocity in a condenser decreases, the induced pressure drop is much lower than in an evaporator.

Why do we keep condenser pressure higher?

To retain the design efficiency the steam inlet pressure should be maintained. Lowering steam inlet pressure reduces turbine efficiency and increases steam consumption. A 10% increase in steam pressure will reduce the steam consumption by about 1% in a condensing.

Why there is low pressure in condenser?

This lower temperature will cause a lower pressure in the condenser because of the pressure/temperature relationship at saturation. As the condenser sees less and less heat from the compressor because of being starved from the undercharge of refrigerant, the condenser split will decrease.

Is condenser pressure lower than atmospheric pressure?

Detailed Solution. Concept: In a condensing turbine, the pressure in the last stage of the turbine is less than atmospheric pressure, and the condensing turbines are characterized by high-pressure ratios.

What are the factors on which lowest pressure in the condenser depends?

The condenser pressure is dictated by two factors, either of which may be limiting: The condenser performance, which is a function of the thermal duty (amount of steam that must be condensed) and the cooling water flow rate and temperature. The NCG removal system capacity.

What is the condenser pressure?

The condensing pressure is the pressure at which the refrigerant is phase changing from a vapor to a liquid. This phase change is referred to as condensation. Thus the term condensing pressure.

Is the condenser high pressure?

The purpose of the condenser is to receive the high-pressure gas from the compressor and convert this gas to a liquid. It does it by heat transfer, or the principle that heat will always move from a warmer to a cooler substance.

What determines the lowest pressure that can be maintained at the condenser?

The condenser pressure is dictated by two factors, either of which may be limiting: The condenser performance, which is a function of the thermal duty (amount of steam that must be condensed) and the cooling water flow rate and temperature.

What is low condensing pressure?

Low condensing refers to the practice of actively tracking ambient temperatures down to a minimum setpoint in order to float the head pressures in refrigeration applications.

When condenser pressure is increased performance is?

As indicated in Figure 5 as the condenser pressure increases the steam entering to the condenser increases. The main reason is when the condenser pressure is high, the turbine is exit enthalpy is high and the specific turbine power output is low.

Why is the condenser called the atmospheric?

It basically takes out the latent heat of vaporization; from the gas mixture whether be steam or gas refrigerant to covert it back to liquid. Condenser that works under vacuum such as in boilers are called vacuum condenser; while the others working under normal or low vacuum condition are called atmosphere condenser.

Does a condenser increase pressure?

Evaporating temperature and evaporating pressure increase as the pressure drop increases. The enthalpy difference across condenser and compressor, however, increase with the increasing pressure drop.

What causes the condenser pressure to rise or fall?

The condenser pressure would rise or fall naturally as the cooling water temperature or steam flow vary. It is in situations where the NCG system has insufficient capacity that improvements in it can improve the condenser pressure.

How does condenser pressure affect the performance of a heat pump?

The condenser pressure and temperature affect the performance of the heat pump cycle and the overall system. Figure 3.15 shows the effect of increasing condenser inlet pressure on the exergy efficiency and energetic COP of the heat pump cycle.

What is the difference between vacuum and atmospheric pressure?

It is also measured by a pressure gauge but the gauge reads on negative side of atmospheric pressure on dial. The vacuum represents a difference between absolute and atmospheric pressures. It is that pressure of a fluid, which is measured with respect to absolute zero pressure as the reference.

How does the condenser pressure change with the capacity of the NCG?

If the NCG system is of sufficient capacity, the condenser pressure is controlled by the condenser characteristics, and no significant further reduction in condenser pressure results if the NCG system has surplus capacity. The condenser pressure would rise or fall naturally as the cooling water temperature or steam flow vary.