A model to predict the latent capacity of air conditioners and heat pumps at part-load conditions with constant fan operation
- CDH Energy Corp., Cazenovia, NY (United States)
- AJT and Associates, Inc., Cape Canaveral, FL (United States)
A model has been developed to predict the latent capacity of an air conditioner or heat pump at part-load conditions with a continuously operating supply fan. The model predicts the latent heat ratio (LHR) at part-load conditions as a function of the run-time fraction (X) or cooling-load fraction (CLF). The model parameters necessary to quantify system performance include the maximum cycling rate (N{sub max}), the air-conditioner time constant ({tau}), the ratio of the initial evaporation rate and steady-state latent capacity ({gamma}), the nominal time after start-up for condensate removal to begin (t{sub wet}), and the temperature and humidity entering the coil. The model compared favorably to measured data from Khattar et al. (1985). A sensitivity analysis was conducted to determine the model parameters that have the strongest impact on the part-load LHR. The model can be easily integrated into hourly building simulation models to more accurately predict the dehumidification performance of air conditioners at part-load conditions.
- OSTI ID:
- 392453
- Report Number(s):
- CONF-960254-; TRN: IM9647%%307
- Resource Relation:
- Conference: Winter meeting of American Society of Heating, Refrigeration and Air Conditioning Engineers, Atlanta, GA (United States), 17-21 Feb 1996; Other Information: PBD: 1996; Related Information: Is Part Of ASHRAE transactions 1996: Technical and symposium papers. Volume 102, Part 1; PB: 1278 p.
- Country of Publication:
- United States
- Language:
- English
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