The paper describes a fuel cell based system and its performance. The system is based on two fuel cell units, DC/DC converter, DC/AC inverter, microprocessor control unit, load unit, bottled hydrogen supply system and a set of measurement instruments. In the study presented in the paper a dynamic response of the proton exchange membrane (PEM) fuel cell system to unit step change load as well as to periodical load changing cycles...

This paper presents a concept of a zero-energy system for powering a single-family house based on a PV system, an electrolyser, a hydrogen gas storage, a fuel cell and a heat pump. Estimated is the demand for electricity and thermal energy consumed in a house inhabited by 3 people and a usable area of 80 m2. The investment costs of the installation were estimated based on the commercially available offer.

At the design stage of heat exchange installation used for gas conversion it is required to test the stability of the installation operation for the expected variable heat loads. For this purpose, a numerical model of the installation can be used. The paper presents an original concept of modelling the operation of heat exchange installations for randomly changing temperatures. Accumulation elements with lumped parameters were...