Evaluation of the potential energy recovery for ventilation air in dwellings in the South of Europe

Guillén-Lambea, Silvia; Rodríguez-Soria, Beatriz; Marı́n, José Marı́a

doi:10.1016/j.enbuild.2016.07.011

Cited by 22 publications

(18 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The quantity Δx = mL/mOA (9) In Equations (7) and (8) is the Specific Latent Load (SLL). Its value can be defined directly from the activity level of occupants within a conditioned space, without taking into account other building or occupation characteristics.…”

Section: Relative Humidity Control In Winter Modementioning

confidence: 99%

“…This effect can be emphasized by heat recovery systems able to recover latent and sensible heat, as shown by Smith and Svendsen [6], who investigated three different scenarios of moisture production and simulated the annual humidity level profile when heat recovery was used, disclosing occurrences of excessive humidity because of excessive recovery. Some studies in the literature also compared the performance of system configurations equipped with either sensible or latent heat recovery devices [7][8][9] or the impact of frost-protection methods on the energy recovery [10]. Furthermore, some researchers gave suggestions for retrofit requirements according to the different climate characteristics, as in [11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Annual Performance of Sensible and Total Heat Recovery in Ventilation Systems: Humidity Control Constraints for European Climates

Tafelmeier¹,

Pernigotto²,

Gasparella³

2017

Buildings

View full text Add to dashboard Cite

Ensuring a comfortable indoor air quality requires a minimum fresh air supply by ventilation. Moreover, the improvement of the air tightness in new and refurbished high performance buildings enhances the role of mechanical ventilation and its importance in further increasing the energy efficiency. Indeed, a reduction of the ventilation load can be achieved by installing air-to-air heat recovery devices, whose potential energy savings can be easily assessed by means of their nominal effectiveness. However, this estimation does not consider the impact on the overall performance of the system, in particular when humidity control is needed. Proper control strategies can be defined on the basis of the indoor latent load to prevent preheating or avoid moisture recovery when dehumidification by cooling is then required. In this work, the energy saving potential of heat recovery systems has been analyzed, considering the impact of different control strategies on both energy and cost savings. The calculations have been generalized using the specific latent load, which allows for the analysis of strategies and savings based on typical utilization categories, without considering in detail all the building characteristics. Representative hourly weather data for 66 European cities have been used to evaluate sensible and total heat recovery devices. The energy and the cost saving results have been mapped per each European Köppen-Geiger climate class and each country, respectively. The proposed strategies based on humidity control can strongly reduce the attractiveness of total heat recovery with respect to sensible heat recovery in terms of energy and cost savings, especially when high specific latent loads are considered.

show abstract

Section: Relative Humidity Control In Winter Modementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Annual Performance of Sensible and Total Heat Recovery in Ventilation Systems: Humidity Control Constraints for European Climates

Tafelmeier¹,

Pernigotto²,

Gasparella³

2017

Buildings

View full text Add to dashboard Cite

show abstract

“…Heat or energy recovery ventilation systems can significantly reduce the energy consumption of heating systems associated with space heating [12]- [14]. Guillén-Lambea et al demonstrated that space heating and cooling requirements of nZEB energy loads cannot be achieved with current ventilation strategies in cold and mild climates, without recovering thermal energy embodied in extracted stale air [15], [16]. From a field survey of 60 units, Fehrm et Independent of building energy consumption, the role of ventilation in residential buildings is primarily to maintain good IAQ by diluting and removing air pollutants.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance characterisation of a reverse-flow energy recovery ventilator for a residential building application

et al. 2019

View full text Add to dashboard Cite

The European Union’s 2020 and 2030 sustainable energy policies seek significant reductions in both energy consumption and carbon emissions. These policies demand a greater use of energy efficient technologies and a transition away from fossil fuels. This paper studies one such technology, an indoor climate control system with a reverse-flow enthalpy recovery ventilator, capable of recovering both sensible and latent heat. The thermal performance characteristics are established using an experimental facility and calculation methods defined by European Standard EN 13141-7:2010. This involves measurement of temperature, humidity, pressure and volumetric air flow rates over a range of operating conditions. Total thermal energy recovery rates ranged from 0.63 kW to 2.2 kW, with energy recovery efficiency of 72.8 % to 88.6 %. The recovery efficiency ratio, which reflects the capacity of the indoor climate control system to recover thermal energy relative to its power consumption ranged between 6.87 to 19.97. Due to the unique reverse-flow defrost function, the system demonstrates operation down to -7 °C without frost formation. These results highlight the potential that this system can make towards the EU goals of reducing energy consumption, operating costs and carbon emissions associated with indoor climate control.

show abstract

“…MAA was also evaluated for the CD air volume and at the outlet. OACE was obtained according to Equation (13).…”

Section: Icd Determinationmentioning

confidence: 99%

“…Hang, [11,12] defined evaluation models of pollutant concentration, based on the ventilation efficiency and age of the air concepts. The efficiency concept relates to comfort, environmental health, building energy efficiency [13] and the quality of life of the citizens [14].…”

Section: Introductionmentioning

confidence: 99%

Proposal for a Simplified CFD Procedure for Obtaining Patterns of the Age of Air in Outdoor Spaces for the Natural Ventilation of Buildings

Padilla-Marcos¹,

Meiss²,

Feijó-Muñoz³

2017

Energies

View full text Add to dashboard Cite

Built urban environments modify the air quality of the natural ventilation processes in buildings. The experimental assessment of outdoor air change (OACH) processes is complex due to the air volumes involved. The quality of the OACH can be analysed through the ventilation efficiency concept, which has been extensively studied in order to characterize the ventilation of indoor spaces. Ventilation efficiency through the age-of-the-air concept assesses the air-change capacity of a certain space. A procedure formulation for obtaining an adequate control domain (CD) to evaluate outdoor air change efficiency (OACE) is proposed. A methodology in two phases is presented: first, an evaluation stage, in which the outdoor air behaviour patterns are studied; then, a second phase where an ideal control domain (ICD) is obtained in order to comparatively assess several cases in similar urban environments. The outcomes determine a proposed ICD for evaluating the design of efficiently ventilated buildings in open urban built environments. The methodology of validation proposed simplifies the assessment of the building shape and its impact on the quality of the OACH by the OACE. The suggested ICD has dimensions of L = 5H; D = 3H; and T = 2H. ICD enables the representation of the air behaviour and fulfils the imposed requirements to evaluate efficiency with a mean accuracy lower than 0.6%.

show abstract

Evaluation of the potential energy recovery for ventilation air in dwellings in the South of Europe

Cited by 22 publications

References 10 publications

Annual Performance of Sensible and Total Heat Recovery in Ventilation Systems: Humidity Control Constraints for European Climates

Annual Performance of Sensible and Total Heat Recovery in Ventilation Systems: Humidity Control Constraints for European Climates

Thermal performance characterisation of a reverse-flow energy recovery ventilator for a residential building application

Proposal for a Simplified CFD Procedure for Obtaining Patterns of the Age of Air in Outdoor Spaces for the Natural Ventilation of Buildings

Contact Info

Product

Resources

About