Ventilation Solutions in Renovated  Apartment Buildings in Cold  Climate Conditions

Koiv, Teet-Andrus; Mikola, Alo; Simson, Raimo

doi:10.4236/eng.2015.73011

Cited by 5 publications

(4 citation statements)

References 10 publications

(9 reference statements)

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“…They also found that the total electricity consumption of fans was twice as high in centralized ventilation units as compared to apartment-based units, indicating that a decentralized ventilation system also has energy-saving potential over a centralized ventilation system. Koiv et al (2015) [16] studied different ventilation strategies using a simulation approach. Their work included simulations of centralized systems, apartmentand room-based systems, and systems with heat recovery in low-rise apartment buildings in cold climates.…”

Section: Previous Studies On Ventilation Strategies In Mf Buildingsmentioning

confidence: 99%

Analysis of alternative ventilation strategies for existing multi-family buildings using CONTAM simulation software

2020

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In many existing high-rise multi-family buildings, a pressurized corridor ventilation system is used to meet outdoor air ventilation requirements. However, this system often has poor performance, leading to under- or over- ventilation in different parts of a building. This study examines three ventilation strategies including: the base case, which is a traditional pressurized corridor ventilation system, a direct-to-suite ducted ventilation system, and a suite-based HRV ventilation system. A building model was constructed in CONTAM using features of a typical post-war multi-family building in Toronto, Canada. All three strategies were simulated using CONTAM under both summer and winter conditions. The resulting outdoor airflow delivery rates to the suites and corridor pressure differentials were compared to assess the effectiveness of each strategy. The results show that the suite-based HRV strategy is able to provide adequate ventilation airflow to individual suites in both summer and winter. In the traditional pressurized corridor system and the direct-to-suite ducting system, the airflows delivered to the suites located at the top of the building are higher than those delivered to the suites located at the bottom of the building. This uneven airflow distribution is more pronounced in winter when stack effect impacts the ventilation system more significantly.

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Section: Previous Studies On Ventilation Strategies In Mf Buildingsmentioning

confidence: 99%

Analysis of alternative ventilation strategies for existing multi-family buildings using CONTAM simulation software

2020

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“…To improve the energy efficiency in the existing buildings, retrofitting is required. The optimal solution for the building retrofit depends on the existing ventilation system and climate conditions [10]. In old buildings with low thermal insulation and poor airtightness, the energy efficiency of the building envelope, together with an improved ventilation heat recovery, should be considered to meet the current European requirements for energy efficiency [11].…”

Section: Introductionmentioning

confidence: 99%

“…In old buildings with low thermal insulation and poor airtightness, the energy efficiency of the building envelope, together with an improved ventilation heat recovery, should be considered to meet the current European requirements for energy efficiency [11]. The standard ways for a retrofit are to replace the original ventilation system with balanced mechanical ventilation or to implement a heat pump together with exhaust airflow energy recovery [10,12,13]. Mechanical exhaust systems equipped with heat pump heat recovery and ventilation radiators are common solutions e.g., in Sweden [14,15].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of the Demand-Based Ventilation in a Nordic Apartment Building

2020

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In general, new Finnish apartment buildings are equipped with mechanical balanced demand-based ventilation. The airflow rate in the kitchen hood is boosted on demand to improve pollutant extraction during cooking. However, in practice, it has been found that the system does not work as desired. The focus of the paper was to present the simulation results from a case building equipped with a ventilation system that is commonly used in Finland. In the analysis, the airflow rates are calculated for the room, apartment, and air handling unit (AHU) levels for various ventilation mode scenarios. A significant imbalance of over 10% between the supply and exhaust airflows at the room and apartment levels was observed in the boosting mode. This imbalance creates a pressure difference over the building envelope, particularly in small studio apartments. The calculated pressure difference for future buildings with high airtightness were at the warning level of 40 Pa below atmospheric level. The kitchen hood exhaust system showed a 28% lower airflow rate in certain scenarios. A new solution to guarantee the designed airflow rates was proposed and assessed. The new solution consists of replacing the apartment level flow control damper and a new balancing method for the kitchen hood exhaust branch. The proposed design was able to stay within 10% of the designed airflow rates in all operation modes.

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“…It is worth mentioning that the AAHX is an easy solution to reduce energy requirements mainly in existing buildings, originally designed only with a natural ventilation system or with mechanical ventilation [3,4].…”

Section: Introductionmentioning

confidence: 99%

The use of earth-to-air and air-to-air heat exchangers for different Italian climates

D’Agostino¹,

Marino²,

Minichiello³

2016

IJHT

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Nowadays, it is very important the use of different technologies that reduce the energy consumption. This paper investigates the energy saving obtainable by using air conditioning systems provided with suitable earth-to-air (EAHX) and/or air-to-air (AAHX) heat exchangers, for two different Italian climates: Palermo, a city of Southern Italy characterized by hot summers and mild winters, and Milan, a city of Northern Italy characterized by hot summers and cold winters. A case study is analyzed by means of dynamic building energy performance software, with reference to the same designed office building with or without the two types of heat exchangers. The seasonal results show that in winter the AAHX reduces the energy requirement more than the EAHX, while in summer the EAHX is more effective. Yearly results show that the use of the EAHX is preferable in mild or hot climates. Moreover, basing on the seasonal results, the two technologies are combined (using the AAHX in winter and the EAHX in summer). The results show that the coupling of the two heat exchangers is more convenient for Milan (saving up to 74%) than for Palermo (59%). Finally, the CO2 emission reductions and discounted payback periods for the two technologies are evaluated.

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Ventilation Solutions in Renovated Apartment Buildings in Cold Climate Conditions

Cited by 5 publications

References 10 publications

Analysis of alternative ventilation strategies for existing multi-family buildings using CONTAM simulation software

Analysis of alternative ventilation strategies for existing multi-family buildings using CONTAM simulation software

Performance Analysis of the Demand-Based Ventilation in a Nordic Apartment Building

The use of earth-to-air and air-to-air heat exchangers for different Italian climates

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