Since DSIMAC is designed as component-based tool with friendly user interface, one can easily drag compressor block, enter required conditions to perform simulation.
Since DSIMAC is designed as component-based tool with friendly user interface, one can easily drag evaporator block, enter required conditions to perform simulation.
In the simulation platform, there are 7 different compressor blocks and each block has three models (cycle, ARI fitting and physical fitting). The 7 compressor blocks are: single speed, variable speed, variable speed & volume ratio, single speed with economized port, variable speed with economized port, variable speed centrifugal with IGV, variable speed centrifugal with IGV and economized port.
Blocks for heat exchanges in the platform, include RTPF,MCHX, BPHX, tranditional shell tube, flooded shell tube, and falling film evaporator. Capillary, TEV, EEV, ball valve, flash tank, receiver, accumulator, etc. are modeled in the platform.
In the simulation platform, each compressor block has three different simulation modules: cycle, simple and detail. In cycle module, user just need to enter very basic characteristics such as displacement, rotation speed, etc. For simple module, user need to enter simplified coefficients, for example of centrifugal compressor, design flow rate & lift & motor efficiency, etc. For detail model, one need to enter ARI coefficients or other physical-based coefficients.
In the simulation platform, each heat exchanger block has four different simulation modules: cycle, volume, simple and lumped. In cycle module, user just need to enter very basic characteristics such as pressure drop, etc. For simple module, user need to enter simplified coefficients, for example of RTPF, nominal flow rate, pressure drop, heat transfer coefficients etc. For lumped module, one need to enter detailed geometry information about the heat exchanger.
cycle
volume
simple
lumped
Since DSIMAC is component-based simulation platform, user can perform component-alone simulation and analysis. Below first graph is the simulation result with different discretized nodes along tube. 2nd grpah is the optimization result with circuiting length of round tube heat exchanger.
DSIMAC platform is also providing the capability of coil circuiting for round tube heat exchanger. Below is the GUI for circuiting design.
Below is the simulation result for circuiting design. There are 4 circuits and 32 tubes. Number in the circuit represents refrigerant outlet quality of tubes. In the simulation, number of unknowns and equations are nearly 2000!
