Radiant floor cooling coupled with dehumidification systems in residential buildings: A simulation-based analysis

Zarrella, Angelo; Carli, Michele De; Peretti, Clara

doi:10.1016/j.enconman.2014.05.097

Cited by 48 publications

(7 citation statements)

References 8 publications

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“…The first concern is regarding the different types of radiant asymmetries. With the emergence of new application scenarios such as floor cooling [24] and floor heating [25], their corresponding requirements and guidelines have been absent. To the best of our knowledge, neither asymmetry-satisfaction curves nor equations has been developed for floor heating/cooling systems.…”

Section: Introductionmentioning

confidence: 99%

Thermal comfort under radiant asymmetries of floor cooling system in 2 h and 8 h exposure durations

Zhou

Liu

Luo

et al. 2019

Energy and Buildings

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Radiant heating and cooling systems inherently exhibit radiant asymmetries. Although many researchers have investigated the thermal comfort effects of asymmetric radiant environments, the exposure duration has not been emphasized, especially under floor heating and cooling scenarios. In this study, we conducted a series of tests in a climate chamber with floor cooling radiant asymmetries with human participants to investigate their thermal comfort effects from short-term (2 h) and long-term (8 h) exposure perspectives. The 2 h exposure test indicates that the floor cooling systems cause discomfort complaints more easily than other radiant systems such as ceiling heating/cooling because of its stronger cooling effects on the lower body parts. The cold floor resulted in significantly colder local thermal sensations and lower local skin temperatures in the foot, calf, and thigh areas. The comparison between the 2 h and 8 h exposures suggests that exposure duration affects both the subjective and physiological thermal comfort responses significantly. Further, 2.5~4 hours are required for the foot and calf temperatures to stabilize in radiant floor cooling asymmetry cases. In accordance with these laboratory tests, we proposed two radiant asymmetry-satisfaction curves and equations for the floor cooling system with consideration of exposure duration. The calculated temperature limits for typical floor cooling room are >18.5 o C at a 2 h exposure and >20.5 o C at an 8 h exposure. These curves and temperature limits can serve as a reference for future guidelines for floor cooling system design and operation. KEYWORDSradiant systems; radiant heating and cooling; asymmetric radiation; exposure duration NOMENCLATURE BMI body mass index PD percentage of dissatisfaction Ref. reference case SD standard deviation TCV thermal comfort vote TSV thermal sensation vote Tsk skin temperature ( o C) Energy and Buildings, April 2019, 188-189, 98-110 2 https://doi.org/10.1016/j.enbuild.2019.02.009 https://escholarship.org/uc/item/8h49f5vr VRT vector radiant temperature ( o C) Δtpr radiant temperature asymmetry ( o C)

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Section: Introductionmentioning

confidence: 99%

Thermal comfort under radiant asymmetries of floor cooling system in 2 h and 8 h exposure durations

Zhou

Liu

Luo

et al. 2019

Energy and Buildings

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“…The air change of infiltration has been assumed equal to 0.24 h -1 during the heating period (whatever the outside temperature is); during the summer, it has been assumed equal to 0.24 h -1 when the outdoor temperature is greater than 26°C and equal to 0.6 h -1 when the ambient temperature is lower than 26°C in order to take into account the more frequent openings of windows (according to Zarrella et al [13]). The occupancy profiles of schools have been defined according to the official schools' timetable for a period ranging between September 15 th and June 30 th (except weekends and periods of school holidays).…”

Section: Description Of the School Buildingsmentioning

confidence: 99%

Influence of Climatic Conditions on Dynamic Performance of Solar Hybrid Heating and Cooling Systems Integrating Seasonal Borehole Thermal Energy Storages: Application to School Buildings in the Campania Region of Italy

Rosato¹,

Ciervo²,

Vigliotti³

et al. 2021

TI-IJES

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In this paper 5 different case studies of solar hybrid heating and cooling networks serving 5 different school buildings assumed as representative of the 5 provinces of the Campania region (southern Italy) have been modelled, dynamically simulated and analyzed by means of the software TRNSYS over a 5-year period. The plants are based on the operation of solar thermal collectors coupled with a seasonal borehole thermal energy storage; the solar field is also integrated with photovoltaic panels coupled with an electric energy storage; a solar-powered adsorption system is used for covering the cooling requirements. Specific weather data files have been developed for each city based on 1-year in-situ hourly measurements to accurately take into account the influence of climatic conditions on systems’ performance; the effects of thermo-physical properties of underground associated to the different locations have also been taken into consideration according to measured data available in the literature. The proposed systems have been compared with conventional Italian heating and cooling plants from energy, environmental and economic points of view in order to assess the potential benefits, highlight the effects of both weather data and characteristics of underground as well as promote the diffusion of solar systems for Italian applications.

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“…The thermal transmittance of windows and walls has been assumed equal to the maximum values (2.40 W/m 2 K for windows, 0.36 W/m 2 K for roofs, 0.40 W/m 2 K for floors, 0.38 W/m 2 K for external walls) imposed by the Italian Law [18]. The air change of infiltration has been hypothesized equal to 0.24 1/h in the course of the heating period, whatever the outside temperature is; in the course of the summer it has been assumed equal to 0.24 1/h when the ambient temperature is lower than 26 °C and equal to 0.6 1/h when the outdoor temperature is greater than 26 °C in order to take into account the more frequent openings of windows (according to Zarrella et al [19]). The stochastic models suggested by Richardson et al [20], with a 1minute time resolution, have been adopted in this paper to characterize the active occupancy and the electricity requirements (due to lighting and appliances) of the houses, resulting in an overall consumption of electricity for the 6 residential buildings equal 16.96 MWh per year.…”

Section: Characteristics Of the District Proposed Cshcpss Plant And mentioning

confidence: 99%

Dynamic simulation of a solar heating and cooling system including a seasonal storage serving a small Italian residential district

et al. 2020

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A centralized solar hybrid heating and cooling system satisfying the thermal, cooling and sanitary water demands of a typical Italian small district composed of six residential buildings situated in Naples (southern Italy) is modelled, simulated and analyzed through the software TRNSYS over a period of 5 years. The plant is based on the operation of solar thermal collectors coupled with seasonal borehole storage; the solar field is also composed of photovoltaic solar panels connected with electric energy storage. An adsorption chiller powered by solar energy is adopted for cooling purposes, while a condensing boiler is used as an auxiliary unit. The performance of the proposed system has been assessed from energy, environmental and economic points of view and contrasted with the operation of a typical Italian heating and cooling plant, highlighting the following main results: (i) saving of primary energy consumption up to 40.2%; (ii) decrease of equivalent CO2 emissions up to 38.4%; (iii) reduction of operating costs up to 40.1%; (iv) simple pay-back period of about 20 years.

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Radiant floor cooling coupled with dehumidification systems in residential buildings: A simulation-based analysis

Cited by 48 publications

References 8 publications

Thermal comfort under radiant asymmetries of floor cooling system in 2 h and 8 h exposure durations

Thermal comfort under radiant asymmetries of floor cooling system in 2 h and 8 h exposure durations

Influence of Climatic Conditions on Dynamic Performance of Solar Hybrid Heating and Cooling Systems Integrating Seasonal Borehole Thermal Energy Storages: Application to School Buildings in the Campania Region of Italy

Dynamic simulation of a solar heating and cooling system including a seasonal storage serving a small Italian residential district

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Radiant floor cooling coupled with dehumidification systems in residential buildings: A simulation-based analysis

Cited by 48 publications

References 8 publications

Thermal comfort under radiant asymmetries of floor cooling system in 2 h and 8 h exposure durations

Thermal comfort under radiant asymmetries of floor cooling system in 2 h and 8 h exposure durations

Influence of Climatic Conditions on Dynamic Performance of Solar Hybrid Heating and Cooling Systems Integrating Seasonal Borehole Thermal Energy Storages: Application to School Buildings in the Campania Region of Italy

Dynamic simulation of a solar heating and cooling system including a seasonal storage serving a small Italian residential district

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Thermal comfort under radiant asymmetries of floor cooling system in 2 h and 8 h exposure durations

Thermal comfort under radiant asymmetries of floor cooling system in 2 h and 8 h exposure durations