Effectiveness of a membrane enthalpy heat exchanger

Siegele, Dietmar; Ochs, Fabian

doi:10.1016/j.applthermaleng.2019.114005

Cited by 15 publications

(5 citation statements)

References 22 publications

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“…Furthermore, ERV allows for dehumidification in summer in humid climates, as shown also in Ref. [12]. In Ref.…”

Section: Review Of Compact Air-sourced Heat Pumps For Renovationmentioning

confidence: 75%

“…The authors in Ref. [12] reported the development of a physical model (based on the NTU method) for an energy recovery ventilation (ERV) system to calculate the effectiveness of a membrane enthalpy heat exchanger and compare it to a conventional heat recovery ventilation (HRV). Simulations based on the model, which was validated through measurements, demonstrate that enthalpy exchangers exhibit a higher total transferred power compared to traditional heat exchangers.…”

Section: Review Of Compact Air-sourced Heat Pumps For Renovationmentioning

confidence: 99%

“…This can happen even if the ventilation system is equipped with an enthalpy exchanger (EE), as shown in Refs. [11,12]. Thus, the maximum specific heating load that can be provided by the system corresponds to approximately 10 W/m 2 for typical residential buildings with typical Energies 2022, 15, 4679 3 of 30 occupation density, making this type of solution not adequate in case of renovations in which specific heating loads are higher than 25 W/m 2 [27].…”

Section: Review Of Compact Air-sourced Heat Pumps For Renovationmentioning

confidence: 99%

“…In this example the recirculation air is heated to 50 °C, which is close to the limit of the maximum air heating temperature. In cold climates, a more satisfactory solution can be achieved with the use of ERV, instead of HRV, to avoid dry air during winter [12]. Moreover, with ERV, lower hygienic airflow rates can be realized, leading to a substantial reduction in the energy consumption.…”

Section: Exhaust Air-to-supply Air Heat Pump System With Secondary Ai...mentioning

confidence: 99%

“…[11,49] for the details of the refrigerant cycle model and also Refs. [11,12] for a detailed description of the test-rig specification including error propagation analysis). The refrigerant cycle was filled with R134a.…”

Section: System-level Optimization-refrigerant Cyclementioning

confidence: 99%

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Compact Decentral Façade-Integrated Air-to-Air Heat Pumps for Serial Renovation of Multi-Apartment Buildings

et al. 2022

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To address the huge market of renovation of multi-apartment buildings, minimal-invasive decentral serial-renovation solutions are required. One major challenge in the design of decentral heat pumps is to find the optimal balance between, on one hand, compactness and pleasant design, and on the other hand, efficiency and minimal sound emissions. A comprehensive holistic design and optimization process for the development of decentral heat pumps, from the component level, to the system level, and up to the building level, is developed. A novel façade-integrated speed-controlled exhaust air to supply air heat pump combined with a mechanical ventilation system with heat recovery and recirculation air was developed and simulated in a reference flat. Compared to a traditional supply air heat pump without recirculation, it shows only slight performance improvement, but allows significantly better thermal comfort and control, independently from the hygienic air flow rate and from the heating and cooling loads. Detailed measurement and simulation results are presented for several functional models with heating power of around 1 kW up to 2.5 kW. The design was optimized by means of CFD simulations to allow for low pressure drop, homogeneous flow, and low sound emissions. Moreover, mock-ups of innovative façade-integrated heat pump outdoor units are presented.

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“…Furthermore, ERV allows for dehumidification in summer in humid climates, as shown also in Ref. [12]. In Ref.…”

Section: Review Of Compact Air-sourced Heat Pumps For Renovationmentioning

confidence: 75%

Section: Review Of Compact Air-sourced Heat Pumps For Renovationmentioning

confidence: 99%