24 June 2014

HEAT PUMP CONCEPTS FOR NEARLY ZERO ENERGY BUILDINGS – INTERIM RESULTS OF IEA HPP ANNEX 40


Political targets for future building standards focus on the introduction of nearly or Net Zero Energy Buildings (nZEB/NZEB) with a horizon of 2020 (Europe, USA) to 2030 (Japan), even though there is no common definition for these types of buildings, yet.
However, different initiatives try to derive a harmonized definition. The Annex 40 in the Heat Pump Programme (HPP) of the International Energy Agency (IEA) has started work in the beginning of 2013 in order to investigate heat pump concepts adapted to the requirements in
nearly Zero Energy Buildings. The eight countries Canada, Finland, Japan, the Netherlands, Norway, Sweden, Switzerland (operating agent) and the USA are participating in the project.
Heat pumps are already well-established in realized nZEB, generally combined with PV as dominating technologies to balance the energy consumption. Current work in the Annex 40 is dedicated to the investigation of system concepts by simulation and the experience from field monitoring of built nZEB in the participating countries. The paper gives an overview on the contributions of participants to Annex 40 and results of the state-of-the-art analysis.