Demand controlled ventilation indoor climate and energy performance in a high performance building with air flow rate controlled chilled beams

Ahmed, Kaiser; Kurnitski, Jarek; Sormunen, Piia

doi:10.1016/j.enbuild.2015.09.052

Cited by 51 publications

(23 citation statements)

References 9 publications

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“…Occupancy schedule is a crucial factor that can change the HVAC load in buildings. Based on the occupancy level Ahmed et al [11] studied the indoor climate condition and the energy performance of Finnish low energy buildings. The average occupancy rate was 0.55 during office hours, which offered 7-8% of primary energy savings for Demand Controlled Ventilation (DCV) system compared to Constant Air Volume (CAV) system [11].…”

Section: Introductionmentioning

confidence: 99%

Occupancy schedules for energy simulation in new prEN16798-1 and ISO/FDIS 17772-1 standards

Ahmed

Akhondzada

Kurnitski

et al. 2017

Sustainable Cities and Society

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Section: Introductionmentioning

confidence: 99%

Occupancy schedules for energy simulation in new prEN16798-1 and ISO/FDIS 17772-1 standards

Ahmed

Akhondzada

Kurnitski

et al. 2017

Sustainable Cities and Society

Self Cite

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“…When the primary air flow rate is too low, part of the primary air will flow out from the return air inlet directly because of the gravity and little return air will be inducted which will degrade the performance of the RIDU. Compared to the chilled beam [23][24][25][26][27][28], because the mixed air will exchange heat with the radiant panel, the induction ratio cannot be too high to prevent a reduction in the temperature difference between the mixed air and the pore radiant panel. However, a sufficient mixed air flow rate needs to be ensured to maintain a sufficient heat exchange efficiency.…”

Section: Resultsmentioning

confidence: 99%

Experimental and Numerical Study of the Radiant Induction-Unit and the Induction Radiant Air-Conditioning System

Zhang

2016

Energies

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Abstract:In this paper we proposed the novel air-conditioning system which combined induction ventilation and radiant air-conditioning. The indoor terminal device is the radiant induction-unit (RIDU). The RIDU is the induction unit combined with the pore radiant panel on which the copper pipes with rigid aluminum diffusion fins are installed. The two-stage evaporator chiller with the non-azeotropic mixture refrigerant is utilized in the system to reduce the initial investment in equipment. With the performance test and the steady state heat transfer model based on the theory of radiative heat transfer, the relationship between the induction ratio of the RIDU and the characteristic of the air supply was studied. Based on this, it is verified that the RIDU has a lower dew-point temperature and better anti-condensation performance than a traditional plate-type radiant panel. The characteristics of the radiation and convection heat transfer of the RIDU were studied. The total heat exchange of the RIDU can be 16.5% greater than that of the traditional plate-type radiant terminal.

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“…Ahmed et al [50] investigated the performance of a demand-controlled VAV chilled beam system in a LEED Platinum office building in Finland. The results indicated that the VAV system saved 7-8% of primary energy compared to a CAV system with equivalent indoor air quality and thermal comfort.…”

Section: Hvac Systemsmentioning

confidence: 99%

Building energy-consumption status worldwide and the state-of-the-art technologies for zero-energy buildings during the past decade

Cao

Dai

Liu

2016

Energy and Buildings

1,041

387

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Demand controlled ventilation indoor climate and energy performance in a high performance building with air flow rate controlled chilled beams

Cited by 51 publications

References 9 publications

Occupancy schedules for energy simulation in new prEN16798-1 and ISO/FDIS 17772-1 standards

Occupancy schedules for energy simulation in new prEN16798-1 and ISO/FDIS 17772-1 standards

Experimental and Numerical Study of the Radiant Induction-Unit and the Induction Radiant Air-Conditioning System

Building energy-consumption status worldwide and the state-of-the-art technologies for zero-energy buildings during the past decade

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