In which type of heat exchanger has hot and cold fluids flows alternatively through the same space?

In which type of heat exchanger has hot and cold fluids flows alternatively through the same space?

Parallel Flow

What is parallel and counter flow heat exchanger?

Counter & Parallel Flow Heat Exchanger Calculator A counter-flow heat exchanger is one in which the direction of the flow of one of the working fluids is opposite to the direction to the flow of the other fluid. In a parallel flow exchanger, both fluids in the heat exchanger flow in the same direction.

What is a 1/2 Heat Exchanger?

Most shell-and-tube heat exchangers are either 1, 2, or 4 pass designs on the tube side. This refers to the number of times the fluid in the tubes passes through the fluid in the shell. In a single pass heat exchanger, the fluid goes in one end of each tube and out the other.

What type of heat exchanger has one of the fluids reverse through a second heat exchanger?

Cross flow, as illustrated in Figure 5, exists when one fluid flows perpendicular to the second fluid; that is, one fluid flows through tubes and the second fluid passes around the tubes at 90° angle. Cross flow heat exchangers are usually found in applications where one of the fluids changes state (2-phase flow).

How do you calculate temperature change in heat exchanger?

4.0 – HEAT EXCHANGERS CALCULATIONS:

1. The main basic Heat Exchanger equation is: Q = U x A x ΔTm =
2. The log mean temperature difference ΔTm is: ΔTm =
3. (T1 – t2) – (T2 – t1) = °F.
4. T1 = Inlet tube side fluid temperature; t2 = Outlet shell side fluid temperature;
5. ln (T1 – t2) (T2 – t1)

How do you calculate pressure drop in heat exchanger?

Since the pressure drop in individual tubes is very easy to calculate using established practices for calculation of pressure drop across tubes and pipes. Total flow on the tubeside can first be divided by number of tubes and pressure drop across a single tube can be calculated using Darcy-Weisbach equation.

How do you calculate Reynolds number in heat exchanger?

The Reynolds number (Re) of a flowing fluid is calculated by multiplying the fluid velocity by the internal pipe diameter (to obtain the inertia force of the fluid) and then dividing the result by the kinematic viscosity (viscous force per unit length).

What is pressure drop in heat exchanger?

When a flow is disturbed, a pressure drop (ΔP) is created, i.e. the flow pressure at the beginning of a passage is higher than at its end. Pressure drop is a phenomenon with both positive and negative consequences for the heat transfer process.

Can Pressure Drop be negative?

It is widely accepted that the frictional pressure drop is impossible to be negative for pipe flow. However, the negative frictional pressure drops were observed for some cases of two-phase slug and churn flows in pipes, challenging the general sense of thermodynamic irreversibility.

Does water pressure drop over distance?

For example, if the water has to travel a long distance through a pipe, your water pressure can drop.

Does pressure drop affect flow rate?

Under laminar flow conditions, pressure drop is proportional to volumetric flow rate. At double the flow rate, there is double the pressure drop. Under turbulent flow conditions, pressure drop increases as the square of the volumetric flow rate. Pressure drop increases as gas viscosity increases.

How does flow rate change with pressure?

Flow rate is the effect. Higher pressure causes increased flow rate. If the flow rate increases, it is caused by increased pressure.

Does water flow rate increase with pressure?

The flow of water from your faucet is determined by water pressure. Through any pipe size, higher water pressure will cause greater water flow. The pressure will decrease downstream, however, because of loss of friction and water velocity increase.

How do you reduce the flow rate of a pump?

Generally speaking, Yes, you can reduce the water flow of the pump. It might be as simple as turning down a valve or teducing the rpm of the pump. Less throttle on a engine driven pump or a reostat on an electric motor driven pump to regulate its speed. Less power in equates to lower RPM which leads to less water out.