Integration of passive PCM technologies for net-zero energy buildings

Stritih, Uroš; Tyagi, V.V.; Stropnik, Rok; Paksoy, Halime; Haghighat, Fariborz; Joybari, Mahmood Mastani

doi:10.1016/j.scs.2018.04.036

Cited by 201 publications

(45 citation statements)

References 15 publications

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“…Over the world there are several examples of net zero‐energy buildings, Indira Paryavaran Bhawan (New Delhi), Akshay Urja Bhawan (Panchkula), living laboratory in Centre for Environmental Planning and Technology (Gujarat), wind side entrance building of National Renewable Energy Laboratory ( NREL ) (Golden city, CO), Woods hole research centre (Falmouth, MA) to name a few. For The term net zero is ambiguous as it is intended to describe many objectives like generating equal amount of energy against the demand, cost reduction of energy up to zero and zero greenhouse emissions . The cost of generating electricity through renewable‐based resources like solar photovoltaic ( PV ) is now getting reduced which provides a path towards the development of energy efficient new buildings and also retrofitting the old ones for achieving the conception of nearly/net zero task .…”

Section: Introductionmentioning

confidence: 99%

“…For The term net zero is ambiguous as it is intended to describe many objectives like generating equal amount of energy against the demand, cost reduction of energy up to zero and zero greenhouse emissions. 4,5 The cost of generating electricity through renewable-based resources like solar photovoltaic (PV) is now getting reduced which provides a path towards the development of energy efficient new buildings and also retrofitting the old ones for achieving the conception of nearly/net zero task. 6 It can be envisaged that proper design consideration along with selection of technology for air-conditioning systems may enable the buildings to acquire nearly/net zero-energy status.…”

Section: Introductionmentioning

confidence: 99%

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Comparative assessment of different air‐conditioning systems for nearly/net zero‐energy buildings

Singh

Das

2020

Int J Energy Res

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Summary This study deals with the performance of different air‐conditioning strategies for achieving the target of nearly/net zero energy in a medium‐scale building under various environmental conditions. In particular, vapour compression (VC), vapour absorption (VA), and integration of radiant cooling technology are analysed using renewable energy resources and solar photovoltaic (PV)‐based electricity. Four different kinds of air‐conditioning configurations are considered: VC‐based, VA‐based, VC‐radiant air‐conditioning technology with VC dedicated outdoor air system (DOAS) and VA radiant air‐conditioning technology with VC‐DOAS. Numerical model validations with the benchmark standards are done for VC‐ and VA‐based systems. In particular, annual electric consumption, electricity generation, thermal load generation among all configurations, emissions and solar fractions are studied. The present study shows that target of nearly/net zero‐energy building can be achieved in an efficient manner through radiant VC‐based system with VC‐DOAS for hot‐dry and composite (ie, hot‐dry with higher humidity) environment conditions. However, for warm‐humid environment, complete net zero is not possible, but up to 74% of net zero target can be assured with VC‐based radiant and DOAS. With respect to the conventional VC‐based system, the payback period assessment for the most suitable nearly/net zero building cooling system varies in the range of 5‐9 years, depending on the environmental conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative assessment of different air‐conditioning systems for nearly/net zero‐energy buildings

Singh

Das

2020

Int J Energy Res

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“…Besides, the phase change materials (PCMs) embedded in a building enclosure are regarded as a useful passive method to increase in heat storage capacity and thermal inertia further [8]. The structures are expected to narrow indoor temperature fluctuations and reduce energy demands [9], and the integration of PCM technologies has been on trial in some net-zero energy buildings recently [10,11].…”

Section: Introductionmentioning

confidence: 99%

The Impacts of a Building’s Thermal Mass on the Cooling Load of a Radiant System under Various Typical Climates

Liu

Niu

2020

Energies

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Cooling load is difficult to predict for a radiant system, because the interaction between a building’s thermal mass and radiation heat gain has not been well defined in a zone with a cooling surface. This study aims to reveal the effect of thermal mass in an external wall on the transmission load in a space with an active cooling surface. We investigated the thermal performances in a typical office building under various weather conditions by dynamic simulation with Energy-Plus. It was found that the thermal mass in the inside concrete layer had positives in terms of indoor temperature performance and energy conservation. The peak cooling load of the hydronic system decreases 28% in the proper operating state, taking into account the effect of the thermal mass in an external wall. Compared to the performances in zones with equivalent convective air systems (CASs), the peak cooling load and the accumulated load of the combined system (radiant system coupled by fresh air system) are higher by 9%–11% and 3%–4%, respectively. The effect of thermal mass is evident in a transient season with mild weather, when the relative effects are about 45% and 60%, respectively, for a building with radiant systems and a building with equivalent CASs.

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“…Within this context, the use of phase change materials (PCM) for passive heating and cooling systems in buildings has attracted the attention of the scientific community as an appropriate technology which can promote net-zero energy buildings [3]. These materials, when integrated into building walls or roofs, can provide thermal benefits due to its high thermal energy storage capacity, which can prevent or delay the cooling peak load during summer and can absorb part of the solar radiation in winter.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Building Envelope with Movable Phase Change Materials for Heating Applications

Gracia

2019

Applied Sciences

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Latent heat storage materials have been tested by several researchers for decades to be used as passive heating and cooling systems in buildings but their implementation into building components is still stacked as is facing specific technical limitations related to difficulties to be charged both in heating and cooling periods. This paper presents a numerical analysis to evaluate the potential of a disruptive system, which is designed to solve the main drawbacks and to convert phase change materials (PCM) passive heating technology into a competitive solution for the building sector. The novel technology moves PCM layer with respect to the insulation layer inside the building component to maximize solar benefits in winter and be able to actively provide space heating. Design variables such as PCM melting point and control schemes were optimized. The results demonstrated that this technology is not only able to limit heat losses towards outdoors but it can provide space heating from stored solar energy when required. The promising numerical results endorse the possibility to build a future experimental prototype to quantify more in detail the benefits of this system.

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Integration of passive PCM technologies for net-zero energy buildings

Cited by 201 publications

References 15 publications

Comparative assessment of different air‐conditioning systems for nearly/net zero‐energy buildings

Comparative assessment of different air‐conditioning systems for nearly/net zero‐energy buildings

The Impacts of a Building’s Thermal Mass on the Cooling Load of a Radiant System under Various Typical Climates

Numerical Analysis of Building Envelope with Movable Phase Change Materials for Heating Applications

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