Specific flow exergy

In an open system, flow exergy is exergy transfer due to mass flow and flow work, and the specific flow exergy exr is... [Pg.189]

As flow processes are common in industry, exergy of the mass flow crossing the system boundary is important. In an open system, excluding the chemical exergy, specific flow exergy exfis... [Pg.199]

Physical exergy results from the deviation of temperature and pressure from the environmental values. Chemical exergy results from the deviation of the composition of a component in a system from the composition of the same component in the environment. Chemical exergy of a stream of matter can be defined as the maximum work (useful energy) that can be obtained from it in taking it to chemical equilibrium (of composition) with the environment. In an open system, the specific flow exergy exf is expressed by... [Pg.203]

Specific costs of discharging flow leaving LHS unit cd and the added exergy cxd are... [Pg.143]

Specific costs of flow leaving greenhouse cg and the exergy removed cxg are... [Pg.144]

In analyzing the production of materials and energy flows, the values of r can be compared with the exergy of the product. The ratio of the specific exergy of the product ex to is called the cumulative degree of thermodynamic perfection 17 for a certain production network... [Pg.280]

The airflow leaving the solar air heaters adds exergy, and therefore the cost is Cip = Ci, + Cif, where Ci, is the cost of the flow entering unit 1 and Cif is the fuel value of added exergy. The specific costs of warm air Ca and exergy Cj are... [Pg.296]

The specific cost of discharging flow leaving the latent heat storage and the added exergy Cexd is... [Pg.296]

In a steam power generation plant, the boiler uses natural gas as fuel, which enters the boiler with an exergy rate of 110 MW. The steam exits the boiler at 6000 kPa and 673.15 K and exhausts from the turbine at 700 kPa and 433.15 K. The mass flow rate of steam is 20.2 kg/s. The unit cost of the fuel is 0.016/kWh of exergy, and the specific cost of electricity is 0.05/kWh. The fixed capital and... [Pg.298]

Exergy flows are identical to power in the case of the change of potential, kinetic, or electric energies. To evaluate the flow i of a fluid mixture, specific exergies e, in kj/kg for every mass flow w, in kg/s must be calculated. [Pg.320]

The specific exergy of gaseous and liquid streams is calculated on a molar basis taking the molar flow in kmol/s into account ... [Pg.320]

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