Conventional Mechanical Systems for Efficient Heating, Ventilating, and Air Conditioning Systems

González, Jorge E.; Bula-Silvera, Antonio

doi:10.1115/1.861271_ch3

Cited by 1 publication

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“…Based on the first law of thermodynamics, heat exchange equation between the air-conditioning system and the external atmosphere is defined as Q 5 C min (T wo,cond 2 T wi,cond ) 5 C min (T Refi 2 T wi,cond ), T wi,cond 5 T wo,CT 5 T wb,air , and T wo,cond 5 T wi,CT , where Q is the heat exchange, which includes the total heat flux in the condenser to maintain the target indoor temperature; T wi,cond is the water temperature entering the air-conditioning system; T wo,cond is the water temperature leaving the air conditioner; T wi,CT is the water temperature entering the cooling system; T wo,CT is the water temperature leaving the cooling tower (CT); the typical superheated temperature (T Refi ) out of the compressor is 608C; and C min is the minimum thermal capacitance between the water and the refrigerant (González and Bula-Silvera 2017). The airconditioning systems were assumed to operate 24 h per day.…”

Section: Data Model Description and Experimental Designmentioning

confidence: 99%

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On the Assessment of a Cooling Tower Scheme for High-Resolution Numerical Weather Modeling for Urban Areas

González

Miao

et al. 2019

Journal of Applied Meteorology and Climatology

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A cooling tower scheme that quantifies the sensible and latent anthropogenic heat fluxes released from buildings was coupled to an operational forecasting system [Rapid Refresh Multiscale Analysis and Prediction of the Beijing Urban Meteorological Institute (RMAPS-Urban)] and was evaluated in the context of the megacity of Beijing, China, during summer months. The objective of this scheme is to correct for underestimations of surface latent heat fluxes in regional climate modeling and weather forecasts in urban areas. The performance for surface heat fluxes by the modified RMAPS-Urban is greatly improved when compared with a suite of observations in Beijing. The cooling tower scheme increases the anthropogenic latent heat partition by 90% of the total anthropogenic heat flux release. Averaged surface latent heat flux in urban areas increases to about 64.3 W m−2 with a peak of 150 W m−2 on dry summer days and 40.35 W m−2 with a peak of 150 W m−2 on wet summer days. The model performance of near-surface temperature and humidity is also improved. Average 2-m temperature errors are reduced by 1°C, and maximum and minimum temperature errors are improved by 2°–3°C; absolute humidity is increased by 5%.

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Section: Data Model Description and Experimental Designmentioning

confidence: 99%

“…In most commercial buildings, anthropogenic heat can be associated to heat release from air-conditioning systems. Most air-conditioning systems use evaporative cooling, which releases a mixture of sensible and latent heat to the environment (González and Bula-Silvera 2017).…”

Section: Introductionmentioning

confidence: 99%

On the Assessment of a Cooling Tower Scheme for High-Resolution Numerical Weather Modeling for Urban Areas

González

Miao

et al. 2019

Journal of Applied Meteorology and Climatology

View full text Add to dashboard Cite

show abstract

Conventional Mechanical Systems for Efficient Heating, Ventilating, and Air Conditioning Systems

Cited by 1 publication

References 0 publications

On the Assessment of a Cooling Tower Scheme for High-Resolution Numerical Weather Modeling for Urban Areas

On the Assessment of a Cooling Tower Scheme for High-Resolution Numerical Weather Modeling for Urban Areas

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