A new moving boundary model for transient simulation of dry-expansion evaporators

Jakob Munch Jensen, Hans-Jørgen Høgaard Knudsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

A new moving boundary model is presented for describing the dynamics of dry-expansin evaporators. The model is derived from conservation equations for mass and energy integrated over the two-phase and the superheated region. The new model is numerical fast compared to discretized models and very robust to sudden changes in the system. The model is well suited for open loop simulation for system design and model based contol strategies as e.g. optimal LQG (linear quadratic gausian) control. Simulation results for a refrigeration system are shown for different changes in evaporator fan speed, compressor speed and expansion valve opening. The simulation results show the expected trends, but the model has not yet been validated with experimental data.
Original languageEnglish
Title of host publicationProceedings of the 15th International Conference on Efficiency, Costs, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2002)
Publication date2002
Publication statusPublished - 2002
EventECOS 2002: 15th International Conference on Efficiency, Costs, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2002) - Berlin, Germany
Duration: 3 Jul 20025 Jul 2002

Conference

ConferenceECOS 2002
CountryGermany
CityBerlin
Period03/07/200205/07/2002

Cite this

Jensen, J. M., & Knudsen, H-J. H. (2002). A new moving boundary model for transient simulation of dry-expansion evaporators. In Proceedings of the 15th International Conference on Efficiency, Costs, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2002)