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design and their source water heat pump using simulation of software Photon 77 and explain step-by-step...

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Mechanical Engineering

design and their source water heat pump usingsimulation of software Photon 77 and explain step-by-step thetheoretical as well as experimental steps to be carried out inorder to design linear compressor technology in the air source heatpump using split evaporator

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Design of System Cakir et al 4 designed a multifunctional heat pump system using just one scroll compressor and which can be run in four different modes namely air to air air to water water to water and water to air in order to make an experimental energetic and exergetic performance comparison Experimental system uses R22 as working fluid Results show that the heat pump unit which has the maximum COP coefficient of performance value is water to air type with 394 and followed by water to water type with 373 air to air type with 354 and air to water type with 340 Ranking of four heat pump types with respect to their mean exergy efficiency is as follows water to air type with 3023 air to air type with 3022 air to water type with 2477 and water to water type with 2401 Exergy destruction rates of the systems were investigated in this study and the results revealed that the heat pump type which has the maximum exergy destruction is air to air type with 293 kW The second highest one is air to water type with 284 kW The third highest one is water to air type with 264 kW and last one is water to water type with 255 kW Zhang et al 7 studied the system optimization of ASHPWH The ASHPWH system consisted of a heat pump and a water tank with the condenser coil installed inside the tank to release heat to the water side by natural convection The capillary tube length the filling quantity of refrigerant the condenser coil tube length and system component matching were discussed accordingly From the testing results it could be seen that the system performance COP could be improved by optimizing the stated parameters Fu et al 17 presented a dynamic model of airtowater dualmode HP with screw compressor having fourstep capacities The dynamic responses of adding additional compressor capacity in stepwise manner were studied and compared to experimental measurements that revealed good agreement MacArthur and Grald 18 put forward a model of vaporcompression heat pumps The heat exchangers were modeled with detailed distributed formulations while the expansion device was modeled as a simple fixed orifice Techarungpaisan et al 19 presented a steady state simulation model to predict the performance of a small split type air conditioner with integrated water heater and validated it experimentally Fardoun et al 20 developed a quasisteady state model using MATLAB and used to predict the system parameters of interest such as hot water temperature condensing and evaporating pressures heating capacity electrical power input and coefficient of performance COP of an air source heat pump water heater ASHPWH Based on the developed model results showed that about 70 of energy consumption and financial cost is reduced comparing it to conventional electrical water heaters as well as 70 of environmental pollution is reduced based on calculating the amount of CO2 produced Hasegawa et al 21 proposed a twostage compression and cascade heating heat pump system for hot water supply Using R12 it could heat water from 10 0C directly to 60 0C The inlet and outlet water temperatures of evaporator are 12 0C and 7 0C and the system COP is 373 Harris et al 22 and Sloane et al 23 have developed two HPWH models One model was designed as a complete unit consisting of a HP assembly mounted at top a 031 m3 water tank The second model was a retrofit unit designed to be used with an existing water heater installation Zhifang and Lin 24 modelled a variable speed hermetic scroll compressor that describes various factors such as the drive frequency suction pressure and discharge pressure as a function of the compressor speed The model was validated experimentally using R22 and R134a in an experimental water source heat pump with variable speed control using frequency conversion The results show that the analytical model properly describes the variable speed characteristics and provides a control strategy for adjusting the capacity of scroll compressors to match the heat pump or air conditioner operating conditions Madonna et al 25 developed a model that simulates the hourly efficiency of airto water heat pump based on thermodynamic considerations and on data coming from a field trial monitoring campaign The model used to predict the behaviour of air source heat pumps installed in a set of residential buildings located different Italian cities in both heating and cooling mode The obtained results show that the climate plays the leading role on annual performance The unit has    See Answer
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