jaefast.blogg.se

• #Ees engineering equation solver generator

This results because increasing the heat input raises the temperature of the ammonia-water vapor.

#Ees engineering equation solver generator

Variation in energetic COP of absorption cooling systems having multiple effects, with the change in heat input to the generator for a condenser load of 400 kW. Although Fig. 7.31 illustrates the connection of the geothermal to the house, Fig. 7.32 shows the heat pump system.įig. The working fluid enters the compressor as a saturated vapor, repeating the cycle. The evaporator acts as a heat exchanger transferring heat from the water glycol solution circulating then in the vertical ground loop to the refrigerant. The throttling process is modeled as an isenthalpic process. From the condenser, the working fluid is throttled in an expansion valve to the evaporator pressure. The working fluid then leaves the condenser as a saturated liquid. A 70 kPa pressure drop is assumed in the condenser. Air is heated as the working fluid is condensed. The working fluid (gaseous phase) is then fed into the condenser, which acts as a heat exchanger. The compressor for the actual system was assumed to have an isentropic efficiency of 87%. The vapor compression cycle operates by compressing the working fluid, ammonia, in the compressor to a high pressure and temperature. The system is designed to meet the demand of a 7.7 kW load. The heat pump uses water glycol solution in the vertical ground loop and ammonia as a refrigerant in the vapor compression cycle for the heat pump, which heats the air for the site. Balance equations for the different states in the system are calculated to understand, the energetic and exergetic performance of the system. For this site, natural gas was used for both heating and for hot water. The demand is evaluated based on monthly utility bills. The heat pump is designed to meet 90% of the heating demand for the building during the winter season. The heat pump is also modeled using the Engineering Equations Solver (EES) to analyze the system thermodynamically.