Final energy savings and cost-effectiveness of deep energy renovation of a multi-storey residential building

Dodoo, Ambrose; Gustavsson, Leif; Tettey, Uniben Yao Ayikoe

doi:10.1016/j.energy.2017.06.123

Cited by 73 publications

(28 citation statements)

References 26 publications

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“…Studies have demonstrated that energy retrofits can results in significant value of saved energy as well as the co‐benefits related to indoor thermal comfort and user satisfaction . The societal effects include meeting sustainability objectives with low carbon technologies as well as possible health effects .…”

Section: Introductionmentioning

confidence: 99%

Effects of energy retrofits on Indoor Air Quality in multifamily buildings

et al. 2019

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We assessed 45 multifamily buildings (240 apartments) from Finland and 20 (96 apartments) from Lithuania, out of which 37 buildings in Finland and 15 buildings in Lithuania underwent energy retrofits. Building characteristics, retrofit activities, and energy consumption data were collected, and Indoor Air Quality (IAQ) parameters, including carbon monoxide (CO), nitrogen dioxide (NO2), formaldehyde (CH2O), selected volatile organic compounds (benzene, toluene, ethylbenzene, and xylenes (BTEX), radon, and microbial content in settled dust were measured before and after the retrofits. After the retrofits, heating energy consumption decreased by an average of 24% and 49% in Finnish and Lithuanian buildings, respectively. After the retrofits of Finnish buildings, there was a significant increase in BTEX concentrations (estimated mean increase of 2.5 µg/m3), whereas significant reductions were seen in fungal (0.6‐log reduction in cells/m2/d) and bacterial (0.6‐log reduction in gram‐positive and 0.9‐log reduction in gram‐negative bacterial cells/m2/d) concentrations. In Lithuanian buildings, radon concentrations were significantly increased (estimated mean increase of 13.8 Bq/m3) after the retrofits. Mechanical ventilation was associated with significantly lower CH2O concentrations in Finnish buildings. The results and recommendations presented in this paper can inform building retrofit studies and other programs and policies aimed to improve indoor environment and health.

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Section: Introductionmentioning

confidence: 99%

Effects of energy retrofits on Indoor Air Quality in multifamily buildings

et al. 2019

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“…Even though the use of fossil fuels is relatively low in this sector in Sweden, improved energy efficiency of buildings and their energy systems are important to reach political goals of a resource efficient society as well as to decrease the environmental and climate impact of our lifestyle [3]. Energy refurbishment is one way to decrease the specific energy use in buildings according to several studies, for example [4][5][6][7]. Improved energy efficiency in buildings also increases the possibility to use low-temperature heating systems due to the decreased heating load.…”

Section: Introductionmentioning

confidence: 99%

Impact of Domestic Hot Water Systems on District Heating Temperatures

2019

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When buildings become more energy effective, the temperature levels of district heating systems need to be lower to decrease the losses from the distribution system and to keep district heating a competitive alternative on the heating market. For this reason, buildings that are refurbished need to be adapted to suit low-temperature district heating. The aim of this paper is to examine whether four different energy refurbishment packages (ERPs) can be used for lowering the temperature need of a multi-family buildings space heating and domestic hot water (DHW) system as well as to analyse the impact of the DHW circulation system on the return temperature. The results show that for all ERPs examined in this study, the space heating supply temperature agreed well with the temperature levels of a low-temperature district heating system. The results show that the temperature need of the DHW system will determine the supply temperature of the district heating system. In addition, the amount of days with heating demand decreases for all ERPs, which further increases the influence of the DHW system on the district heating system. In conclusion, the DHW system needs to be improved to enable the temperature levels of a low-temperature district heating system.

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“…According to the current building regulation, some older buildings are not energy efficient and there is potential to save a lot of energy. An analysis of the cost-effectiveness of energy refurbishment of multi-family houses built in the 1970s supports the statement that there is a potential for energy refurbishment of older buildings (Dodoo et al 2017).…”

Section: Energy Management and Activitiesmentioning

confidence: 59%

A discussion of building automation and stakeholder engagement for the readiness of energy flexible buildings

Jôrgensen

2018

Energy Inform

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Building automation enables the possibility of energy flexibility in buildings. To investigate the motivation and barriers for the energy flexibility in buildings, this study develops a conceptual framework of the readiness for energy flexible buildings by conducting interviews with building automation suppliers, electricity supplier, district heating supplier, distribution system operator, energy service companies, experts in energy and buildings, building managers, and occupants. The two main parts of the framework are building preparation, grid and market conditions following the impacts of regulation and policies, stakeholder collaboration and integrated building automation. A case study of campus buildings is conducted to demonstrate the framework. The result of the case study shows that the main barriers for buildings to provide energy flexibility are 1) many buildings are too old and need to be refurbished, 2) the benefit of providing energy flexibility to the grid is not sufficient, 3) building management systems need to be either installed or upgraded to response to the demand from the grid. Building managers believe that buildings can provide energy flexibility by building automation and distributed energy resources, but they consider energy efficiency to be more important than providing flexibility to the grid. Meanwhile, occupants have different opinions regarding the comfort level of indoor air quality and control, and the differences are based on various factors, e.g. location, room type, and building ages. Background 'The energy flexibility of a building is the ability to manage its energy demand and generation according to local climate conditions, user needs and grid requirements' (Jensen et al. 2017a). A large part of the energy use of buildings may be shifted in time, and significantly contribute to increasing flexibility in the energy system (Jensen et al. 2017b). Buildings can provide flexibility to the energy system in various ways, e.g. load shifting and HVAC (heating, ventilation, and air conditioning) control, and participate in two types of DR (demand response) programs: explicit and implicit demand response. Implicit DR assumes that electricity consumers may alter their electricity consumption due to a price signal that is provided at a different time (Mandatova and Lorenz 2013). Meanwhile, explicit DR is divided into traditional-based (e.g. direct load control, interruptible pricing) and market-based (e.g. emergency demand response programs and ancillary services) (Sebastian and Margaret 2016).

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Final energy savings and cost-effectiveness of deep energy renovation of a multi-storey residential building

Cited by 73 publications

References 26 publications

Effects of energy retrofits on Indoor Air Quality in multifamily buildings

Effects of energy retrofits on Indoor Air Quality in multifamily buildings

Impact of Domestic Hot Water Systems on District Heating Temperatures

A discussion of building automation and stakeholder engagement for the readiness of energy flexible buildings

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