Review of heat/energy recovery exchangers for use in ZEBs in cold climate countries

Alonso, María Justo; Liu, Peng; Mathisen, Hans Martin; Ge, Gaoming; Simonson, Carey J.

doi:10.1016/j.buildenv.2014.11.014

Cited by 130 publications

(14 citation statements)

References 46 publications

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“…On the basis of the presented charts (Figs. 5,6,7,8,9,10,11,12,13,14), one can notice that the function of the temperature effectiveness is shaped in a similar way for all presented variants of the rotor's depth, i.e., its value rises due to moisture accumulation (in the form of water film or frost layer). Another similarity is an increase in "dry" area with increasing outdoor air temperature.…”

Section: Results Of Simulationsmentioning

confidence: 69%

“…In the next stages, the possibilities of reducing the effectiveness of the device will be analyzed, which, as could be seen in the graphs (Figs. 5,6,7,8,9,10,11,12,13,14), allow for the elimination of frost accumulation zones, causing its melting.…”

Section: Results Of Simulationsmentioning

confidence: 99%

“…Justo Alonso et al [13] emphasized the need for using mechanical ventilation systems with heat recovery devices while designing Zero Energy Building in cold climate. They focused on comparison of the properties for different types of heat/energy recovery systems: recuperative and regenerative heat exchangers and also regenerative energy exchangers.…”

Section: Introductionmentioning

confidence: 99%

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The influence of geometrical parameters on heat and mass transfer processes in rotary heat exchangers

2019

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This paper focuses on the influence of geometrical parameters of the rotary heat exchanger on its operation under highspeed rotor conditions. Proposed mathematical model of heat recovery wheel is based on a structure of the counter-flow heat exchanger model. After implementation of a numerical method on the modified α-model, the computer simulations were conducted. They allowed considering the distribution of the active heat and mass transfer zones ("dry," "wet" and "frost") on the matrix channel surface depending on the outdoor air conditions for different variants of rotor size. The obtained results indicate that the increase in the wheel's depth leads to the increase in temperature effectiveness of heat recovery (from 0.667 to 0.814). Moreover, it was also established that the threshold temperature under which the frost is accumulated on the core surface also rises with the rotor depth (from − 10.7 to −9.6 °C). It was concluded that under certain outdoor air temperature conditions (t 1i > -10.7 °C, for rotor depth equal to 0.40 m), the mass transfer rate of the condensed water vapor in the channels of the return air side is equal to the evaporation mass transfer rate in the channels of the supply air side, and hence, the temperature efficiency reaches the same value level as under "dry" operating conditions. It was established that only under frost accumulation conditions, the increased temperature effectiveness is observed. Keywords Thermal wheel · Waste heat recovery · Mathematical model · Energy saving List of symbols cSpecific heat capacity (J/(kg K)) D Diameter of the plate channel (m) Δ̄e vap 1

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Section: Results Of Simulationsmentioning

confidence: 69%

Section: Results Of Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The influence of geometrical parameters on heat and mass transfer processes in rotary heat exchangers

2019

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“…The higher airflow rates will increase the primary energy demand significantly. Removal of the defrosting unit from the ventilation system in order to lower energy consumption is potentially a problematic solution, as earlier studies have shown that unless defrosting measures are taken into consideration, plate heat exchangers will end up being blocked by ice and may even get damaged in cold climate [7].…”

Section: Discussionmentioning

confidence: 99%

Performance of Heat Recovery Ventilation System with Ground Source Brine Heat Exchanger Pre-Heating System in the Context of nZEB

Kuusk

Hallik

Kalamees

et al. 2015

Proceedings of REHVA Annual Conference "Advanced HVAC and Natural Gas Technologies"

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-The paper analyzes effectiveness of the ventilation unit pre-heating system with a ground source brine heat exchanger in a nearly zero energy building in Estonia. Focus is on the analysis of measured energy usage and possible effects on the energy usage of alternative solutions of the ventilation pre-heating system in terms of nearly zero energy building. The studied building was planned and realized according to the international passive house concept. To further lower the energy demand, the building was equipped with a solar thermal system and a photovoltaic solar system to cover the total final energy demand of the building, making it nearly zero energy building. The ventilation system is equipped with temperature and relative humidity sensors to measure supply, extract, exhaust air parameters and air parameters before and after the pre-heating system. Energy usage to pre-heat the ventilation airflow with a ground source brine heat exchanger was also measured. Our results show that annual energy used for pre-heating the ventilation airflow is around 420 kWh, which makes about 3% of the building's total energy usage. The efficiency of the ventilation unit heat exchanger was over 80 % in the winter season due to the pre-heating system. Keywords -ground source brine heat exchanger, nearly zero energy building, ventilation unit, frost protection.

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“…Indeed, analyzing the combinations of various materials is considered an effective method for designing external walls characterized by high energy performance for ZEB [25], considering that ZEB aims at reducing the energy demand through efficient technology measures [26]. In addition, the design of new building technologies upcycling municipal waste materials involves an additional reduction of environmental impacts [16], which decreases the waste amount to be treated thanks to local reuse.…”

Section: Methodsmentioning

confidence: 99%

Reuse and Upcycling of Municipal Waste for ZEB Envelope Design in European Urban Areas

et al. 2016

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Abstract:Building energy efficiency and urban waste management are two focal issues for improving environmental status and reducing greenhouse gas emissions. The main aim of this paper is to compare economic costs of new building envelope structures designed by authors reusing and upcycling municipal waste in order to decrease energy demand from the building sector and, at the same time, improve eco-friendly waste management at the local scale. The reuse of waste for building envelope structures is one of the main principles of the Earthship buildings model, based on the use of passive solar principles in autonomous earth-sheltered homes. This Earthship principle has been analyzed in order to optimize buildings' energy performance and reuse municipal waste for new building envelope structures in urban areas. Indeed, the elaborated structures have been designed for urban contexts, with the aim of reuse waste coming from surrounding landfills. The methods include an analysis of thermal performance of urban waste for designing new building envelope structures realized by assembling waste and isolating materials not foreseen in Earthship buildings. The reused materials are: cardboard tubes, automobile tires, wood pallets, and plastic and glass bottles. Finally, comparing economic costs of these new building envelope structures, the obtained results highlight their economic feasibility compared to a traditional structure with similar thermal transmittance.

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Review of heat/energy recovery exchangers for use in ZEBs in cold climate countries

Cited by 130 publications

References 46 publications

The influence of geometrical parameters on heat and mass transfer processes in rotary heat exchangers

The influence of geometrical parameters on heat and mass transfer processes in rotary heat exchangers

Performance of Heat Recovery Ventilation System with Ground Source Brine Heat Exchanger Pre-Heating System in the Context of nZEB

Reuse and Upcycling of Municipal Waste for ZEB Envelope Design in European Urban Areas

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