Study of a prototype of an advanced mechanical ventilation system with heat recovery integrated by heat pump

Fucci, Flavio; Perone, Claudio; Fianza, Giovanna La; Brunetti, Lucio; Giametta, Ferruccio; Catalano, Pasquale

doi:10.1016/j.enbuild.2016.09.038

Cited by 28 publications

(10 citation statements)

References 13 publications

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“…Compared to an extract air HP, the temperature level of the evaporator in an exhaustair HP is lower, but the air is almost saturated. Hence, the enthalpy is still higher than that in ambient air [10,11]. The authors in Ref.…”

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

confidence: 96%

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

confidence: 96%

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

et al. 2022

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“…Fucci F. et al evaluated the energy performance of a CMV system with heat recovery [11]. The study was realized to evaluate the energy performance of the system, tested during winter, modifying the outside temperature (−5 • C; 0 • C; 5 • C; 10 • C) and keeping the inner temperature fixed (20 • C).…”

Section: Mechanical Ventilation Application In Case Studiesmentioning

confidence: 99%

Controlled Mechanical Ventilation in Buildings: A Comparison between Energy Use and Primary Energy among Twenty Different Devices

2018

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Indoor air quality (IAQ) of buildings is a problem that affects both comfort for occupants and the energy consumption of the structure. Controlled mechanical ventilation systems (CMVs) make it possible to control the air exchange rate. When using CMV systems, it is interesting to investigate the relationship between the useful thermal energy requirements for ventilation and the energy consumption of these systems. This paper addresses whether there is a correlation between these two parameters. The methodology used in this work involves the application of equations of technical Italian regulations UNI/TS 11300 applied to a case study. The case study is represented by a 54 m 3 room, which is assumed to have three CMV systems installed (extraction, insertion, insertion and extraction) for twenty different devices available on the market. Afterwards, simulations of useful thermal energy requirements Q H,ve and primary energy E P,V were performed according to the electrical power of each fan W and the ventilation flow. The results show that the two values are not linearly correlated: it is not possible to clearly associate the operating cost for CMV systems according to building requirements. The study also shows that CMV systems are particularly efficient for high-performance buildings, where there is no leakage that can be ascribed to windows infiltrations.

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“…The exhaust air heat pump (EAHP) avoids these problems with the complete separation of fresh air and exhaust air, moreover, it occupies less space, easy to maintain [25], and adapt well in different situations [26]. The 75%~300% temperature effectiveness of exhaust heat recovery is the significant characteristic that can't be observed on other types of heat recovery devices [27]. To further improve the energy efficiency of EAHP, Zhang et al [28] proposed a multi-heat exchanger EAHP, the study shows that the proposed system can keep both evaporators frost-free, and the heating COP achieved 4.8 at ambient temperature 7 °C/6 °C.…”

Section: Introductionmentioning

confidence: 99%

Technical requirements analysis of integrated paralleled-loop exhaust air heat pump system applied to ultra-low energy building in different climatic regions of China

Zhou

et al. 2022

THERM SCI

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Based on the simulation results of the typical rural ultra-low energy building (ULEB) in 5 different climatic regions of China, three indicative technical parameters for paralleled-loop exhaust air heat pump (PEAHP) R&D- which are nominal heating/cooling capacity, maximum required fresh air to return air ratio (MFRR) and system energy efficiency grades- were calculated and summarized according to the demand of indoor thermal comforts by using statistic method. The nominal heating/cooling capacities were determined according to the peak loads, which are 6.84/2.01kW, 5/2.96 kW, 3.9/4.6 kW, 3.08/5.02 kW and 3.4/0.46 kW in the ULEB of Harbin, Beijing, Shanghai, Guangzhou and Kunming respectively. To ensure both thermal comforts and energy conservation, during the heating season, full fresh air supply is suggested in Beijing and the 1:0.5 MFRR is suggested in Harbin, Shanghai, Guangzhou and Kunming. During the cooling season, the 1:5 MFRR is suggested in Shanghai and Guangzhou, the 1:3, 1:1.5 and 1:0.5 MFRR are suggested in Harbin, Beijing and Kunming respectively. The PEAHP energy efficiency grades 1~5 are 7.92~11.7, 7.58~11.5, 7.5~11.35, 6.12~9.27 and 4.64~7.03 during the heating season of Harbin, Beijing, Shanghai, Guangzhou and Kunming respectively, and are 2.33~3.54, 3.93~5.96, 4.61~6.98, 4.62~6.99 and 2.04~3.1 for the cooling season respectively.

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Study of a prototype of an advanced mechanical ventilation system with heat recovery integrated by heat pump

Cited by 28 publications

References 13 publications

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

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

Controlled Mechanical Ventilation in Buildings: A Comparison between Energy Use and Primary Energy among Twenty Different Devices

Technical requirements analysis of integrated paralleled-loop exhaust air heat pump system applied to ultra-low energy building in different climatic regions of China

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