What is the pinch point in pinch analysis?

3.3 Pinch analysis. Pinch Analysis deals with the optimal management of energy in a process plant. The approach is based on the identification of the Pinch Point as the location where the heat exchange between the analysed process streams is the most constrained.

What is the pinch point temperature difference in a HRSG?

Approach point is the difference between saturation temperature and feed water temperature entering the evaporator= ts -tw2. Pinch and approach points cannot be arbitrarily selected. In an unfired HRSG, minimum pinch and approach points range from 10 to 20 F depending on economic considerations.

What are the parts of a heat exchanger?

Heat Exchanger Parts

• SHELL. SHELL is the component of HE which keeps everything inside it.
• TUBES. TUBES are the second component that carries either hot or cold fluid.
• TUBESHEET. TUBESHEET is located on both sides of HE.
• BAFFLES.
• TIE ROD.
• SPACERS.
• NOZZLES.
• PASS PARTITION PLATE.

What is the key role of pinch technology?

Pinch technology (process integration) allows the trade-offs between operating and capital costs of a mix of heat exchangers to be explored and thus the justification for using new devices can be made…’.

What is the use of pinch technology?

Pinch technology is mainly used in major chemical manufacturing plants or oil refineries where heating or cooling of feed streams is required. Pinch analysis uses the hot streams to heat the cold streams and vice versa, thus saving the hot or the cold utility loads which obviously helps in energy and cost savings.

What is pinch point in steam generator?

PINCH POINT IN EXHAUST GAS BOILER IS THE DIFFERENCE IN TEMPERATURE BETWEEN THE EXHAUST GAS LEAVING THE EVAPORATOR SECTION AND SATURATED STEAM. LOWER THE PINCH POINT, HIGHER THE E.G.B EFFICIENCY AND IS ACHIEVED BY HAVING A HIGHER HEAT SURFACE AREA.

What is nozzle in heat exchanger?

The prime purpose of nozzles, headers, and turnarounds is to distribute fluid through a heal exchanger matrix, as shown in Figure 1 for a typical case. In many instances this approach results in poor distribution of the fluid within the heat exchanger.

What are the parts of the exchanger?

The principal components of shell-and-tube heat exchangers are:

• Tubes.
• Tubesheet.
• Shell and Shell-Side Nozzles.
• Tube-Side Channel and Nozzles.
• Baffles.
• Tie-rods.

How do you measure pinch temperature?

Check the heat required to bring the cold streams from their source temperatures to the pinch temperature: stream 3 ΔH = 60.0 (80 − 30 ) = 3000 kW. Stream 4 is at the pinch temperature.

What is pinch technology and its key role in chemical engineering?

The Pinch principles have been described extensively in chemical engineering literature. Essentially, Pinch Technology is a technique that is used to analyse heat availability in process’ hot streams and to match it against the heat demand of suitable cold streams, in an optimum fashion.