Start-stop control strategies for heat recovery in multi-zone water-loop heat pump systems |
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| Institution: | 1. Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3123, USA;2. MPA-CINT, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;3. Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843-3128, USA;4. Nuclear Engineering Division, Argonne National Laboratory, Argonne, IL 60439, USA;5. Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA;6. Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123, USA;7. School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA |
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| Abstract: | A study is made to determine the energy saving potential of a start—stop controlled water-loop heat pump (WLHP) system. The physical model consists of individual heat pumps for each zone, a two-pipe water-loop system (with and without a storage tank), a boiler and an evaporative cooler. The overall system consists of four input energy controllers and an equal number of mass flow rate controllers. A simple start-stop control strategy for the system is developed. Results showing the typical daily operation of the system under changing heating and cooling loads are presented. A method for selecting the appropriate limits for loop water temperature which results in energy savings is given. |
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