Integration of a magnetocaloric heat pump in a low-energy residential building

Abstract

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Nature—Inspired Flow Patterns for Active Magnetic Regenerators Assessed Using a 1D AMR Model

“…Thus, two different types of the regenerator cassettes were selected for the numerical analysis presented in this article. The size of the first type of the regenerators is based on the cassettes of the MagQueen, which is a magnetocaloric heat pump, developed at DTU Energy (Dall'Olio et al, 2017;Johra et al, 2018). Originally, the cassettes of MagQueen were tapered in order to obtain higher COP.…”

Integration of a magnetocaloric heat pump in an energy flexible residential building

“…2 can look different from the ones of publications reporting COPs of the sole AMR operation. The MCHP of the current study can produce 2600 W of useful heating power with an average seasonal COP of 3.93 when operating at fluid flow rate of 2200 L/h and with a rotation frequency of 1 Hz [37].…”

“…The AMR system principle is described in detail in the articles of Engelbrecht et al [28] and Lei et al [35]. A previous study from the ENOVHEAT project [37] numerically demonstrated for the first time that such a magnetocaloric heat pump (MCHP) can be implemented in a low-energy single family house and provide for its space heating needs under cold weather climate conditions (Denmark). In this project, the MCHP is used solely for indoor space heating because domestic hot water production requires a higher temperature span.…”

“…As illustrated in Fig. 3, this leads to modest performances (average seasonal COP of 1.84) compared to the optimum operation point of this MCHP [37]. The development of control strategies adjusting fluid flow and operation frequency of the MCHP for efficient partial-load operation is thus very important [41].…”

Energy Applications of Magnetocaloric Materials

“…Albertini et al conducted a preliminary study of a prototype rotary magnetic refrigerator consisting of four static active magnetic regenerators and a rotor with two permanent magnet assemblies. In 2018, Johra et al reported the numerical evaluation of a magnetic heat pump that could be integrated into a single hydronic loop including a ground‐source heat exchanger and a radiant under‐floor heating system. The device was designed for a maximum heating power of 2600 W and consisted of 13 regenerators arranged in a trapezoidal form and with beds packed with 0.45 mm spheres.…”