What do you mean by stack effect?

What do you mean by stack effect?

The stack effect or chimney effect is the movement of air into and out of buildings through unsealed openings, chimneys, flue-gas stacks, or other containers, resulting from air buoyancy. Buoyancy occurs due to a difference in indoor-to-outdoor air density resulting from temperature and moisture differences.

What is the function of stack effect?

Stack effect, also called chimney effect, drives airflow through buildings. Controlling air movement into and through a building can increase energy efficiency and save money.

What do you mean by stack effect in ventilation?

July 2, 2019. In architectural design, the stack effect refers to passive air movement throughout a building due to variances in vertical pressure initiated by thermal buoyancy. If the air within a building grows warmer than the temperature of the surrounding outdoor air, the warmer and lower-density air will rise.

What is stack effect pressure?

Stack effect is a pressure difference that causes uncontrolled air flow. It occurs when the temperature differs from outside to inside a building. The direction of air flow depends on whether the building is being heated or cooled.

What is stack effect in VLSI?

Transistor stacking is a technique used in active mode for leakage power reduction. The importance of the stack effect is given in by Siva et al [12]. The leakage current decreases when two or more series transistors are turned off, which is known as Stack effect or Self-Reverse bias effect.

What is the stack effect in a fire?

If outside conditions are cold and inside temperatures are warm, the smoke will migrate to upper floors remote from the fire floor. This is known as stack effect.

What is elevator stack effect?

What is stack in algorithm?

A stack is an Abstract Data Type (ADT), commonly used in most programming languages. It is named stack as it behaves like a real-world stack, for example – a deck of cards or a pile of plates, etc. A real-world stack allows operations at one end only.

How do you calculate dynamic power dissipation?

Because dynamic power dissipation depends on the square of the supply voltage and linearly on the frequency (P = CV2 f), if both the supply voltage and frequency are scaled down, there is a cubic reduction in power consumption.

What are power gating cells in VLSI?

Power gating is a technique used in integrated circuit design to reduce power consumption, by shutting off the current to blocks of the circuit that are not in use. In addition to reducing stand-by or leakage power, power gating has the benefit of enabling Iddq testing.

What factors contribute to the stack effect?

There are three main things that affect the stack effect: Height of the building. Temperature/pressure difference between the indoors and outdoors. Moisture.

What is the use of stack in data structure?

A Stack can be used for evaluating expressions consisting of operands and operators. Stacks can be used for Backtracking, i.e., to check parenthesis matching in an expression. It can also be used to convert one form of expression to another form. It can be used for systematic Memory Management.

Is full function in stack?

isFull: Returns true if the stack is full, i.e., its size has reached maximum allocated capacity; otherwise, it returns false. peek: Returns the top element present in the stack without modifying the stack.

What is the difference between static and dynamic power dissipation?

Dynamic power is comprised of switching and short-circuit power; whereas static power is comprised of leakage, or current that flows through the transistor when there is no activity.

What is leakage and dynamic power?

Dynamic (or switching) power consumption occurs when signals which go through the CMOS circuits change their logic state charging and discharging of output node capacitor. Leakage power consumption is the power consumed by the sub threshold currents and by reverse biased diodes in a CMOS transistor.

What is retention register?

Retention registers are special low leakage flip-flops used to hold the data of the main registers of the power gated block. Thus, the internal state of the block during power down mode can be retained and loaded back to it when the block is reactivated. The retention strategy is design dependent.

What is leakage power?

Leakage power is primarily the result of unwanted subthreshold current in the transistor channel when the transistor is turned off.