Chemical & Materials Engineering

System identification is the process of building a mathematical model that describes the behavior of a system based on experimental data. The goal of system identification is to determine the relationship between the inputs and outputs of a system so that the system can be understood and controlled more effectively. System identification is commonly used in engineering, physics, and other fields..

카테고리 없음 2023. 4. 6. 07:02

Model predictive control (MPC) is a control strategy that uses a mathematical model of the system being controlled to predict its future behavior and optimize a control signal accordingly. The goal of MPC is to minimize the difference between the predicted behavior of the system and a desired setpoint while satisfying any constraints imposed on the system. MPC works by formulating an optimizatio..

카테고리 없음 2023. 4. 6. 06:43

A condenser is a heat exchanger where compressed & superheated refrigerant releases the heat to the environment. For instance, a refrigerant with condensing temperature of 25 °C enters a condenser that uses an ambient air (20 °C). The refrigerant is probably superheated due to the compression work, thus before condensing, the refrigerant is quickly de-superheated. Once the refrigerant reaches it..

카테고리 없음 2023. 4. 3. 07:24

For direct expansion (DX) evaporators, the refrigerant (in two-phase) enters an evaporator straight after the expansion process while for flooded evaporator, the low pressure refrigerant after the expansion enters a gas-liquid separator which is connected to an evaporator. A saturated liquid refrigerant is fed to the evaporator, and partially evaporated (two-phase mixture). This benefits the eff..

카테고리 없음 2023. 3. 30. 12:21

Vapour-compression cycles are used to move heat from a cooler to a warmer place by adding work via a compressor. The performance of the cycles is generally characterised using the ratio of heat removed (cooling) or heat added (heating) to the energy added (in the form of electricity or compressor work), a.k.a. COP (coefficient of performance). To determine the COP of the system, thermal loads (t..

카테고리 없음 2023. 3. 27. 11:15

Vapour-compression cycle, as known as a refrigeration cycle, is mature technology widely used for refrigeration and heat pump systems. Vapour-compression cycle consists of four main components and a refrigerant flowing in the cycle. The four components are an evaporator, a condenser, a compressor, and an expansion device. At the evaporator, liquid refrigerant (or two-phase) is vapourised while a..

카테고리 없음 2022. 10. 4. 11:55