Development of TRNSYS Modules of a Multi-functional Heat-pump Apparatus

다기능 열펌프 기기의 트랜시스 모듈 개발에 관한 연구

  • Received : 2014.04.30
  • Accepted : 2014.06.20
  • Published : 2014.08.30


As construction of low-energy buildings becomes a rising issue, small-size energy systems can deal with loads in heating, domestic hot water(DHW) supplying, ventilation, and so on. A single apparatus containing all the system components is recently developed particularly in Europe. Since a single heat pump inside the apparatus must meet different energy needs, dynamic analyses are important for such a system. In this work, a simulation model of a selected multi-functional apparatus is developed in TRNSYS, one of the well-known dynamic simulation tool. Each energy component is defined using experimental results, and a final combined TRNSYS module is validated with experimentation carried out for the entire system. Results show that error is under 10% for all the testing cases. Transient simulations are run with the developed model to analyze the thermal behaviour of the apparatus. As the heat pump is operated in a way that the control priority is on DHW, auxiliary heaters are frequently operated when DHW signals are active and particularly for a not-well insulated building and when outdoor temperatures are low. Analysis results also show potential of connecting a solar thermal collector to the apparatus as proposed in an option by the manufacturer.


Multi-functional heat pump;TRNSYS modules;Transient simulation


  1. 서승직, 최원기, 트랜시스 응용 프로그램, 일진사, 2009
  2. Fleury E, Rapport intermediaire, Systemes compacts ventilation chauffage eau chaude en Allemagne, Autriche et Suisse, CSTB, 2006
  3. Liu X, Long N, Lau SK, Li H, Performance analysis of a multi-functional Heat pump system in heating mode, Applied Thermal Engineering, vol. 51, pages 698-710, 2013
  4. Klein SA, Beckman WA, Mitchell JW, Duffie JA, Duffie NA, Freeman TL, et al. TRNSYS 16 - a transient system simulation program. Madison, USA: Solar Energy Laboratory, University of Wisconsin, 2006.
  5. Ge YT, Tassou SA, Chaer I, Suguartha N, Performance evaluation of a tri-generation system with simulation and experiment, Applied Energy, vol. 86, pages 2317-2326, 2009
  6. Liu X, Lau SK, Li H, Optimization and analysis of a multi-functional heat pump system with air source and gray water source in heating mode, Energy and Buildings, vol. 69, pages 1-13, 2014
  7. Krauss G, Virgone J, Etude Parametrique de Systemes de Production d'Eau Chaude Solaire en Logements Collectifs, 2006