Performance comparison of temperature and humidity independent control air-conditioning system and the conventional air-conditioning system

This article introduces two system models to simulate the energy performance of the temperature and humidity independent control air-conditioning system (THICS) and the conventional air-conditioning system (CAS). The energy performance comparison includes three parts of cooling resource, transportation system and terminal devices. A typical office building with these two different systems is numerically analyzed. Beijing and Guangzhou, two major cities in China, are chosen, which lay in temperate zone and tropical zone respectively.

STUDY ON THE RELATIONSHIP BETWEEN A HEAT LOSS FROM FLOOR HEATING AND AIR-CONDITIONING IN A LIVING ROOM

With radiant heating, it is possible to set room air temperature lower than when heating withair-conditioning because the human body is heated by a radiation. As room air temperature decreases,heat loss from walls and windows decreases, and so does the ventilation load. It is often said that theradiant heating, such as floor heating saves energy. This study calculates heat flow at the windows andthe walls of a living-room using computational fluid dynamics (CFD).

CFD STUDY OF THE THERMAL ENVIRONMENT IN AN AIR-CONDITIONED TRAIN STATION BUILDING

This study evaluated and optimized the thermal environment inside an air-conditioned train stationbuilding using the computational fluid dynamics (CFD) method. The impacts of some air-conditioningdesign parameters such as supply air temperature, velocity, altitude and incidence angle on indoorthermal environment were discussed. The primary air-conditioning design scheme was optimized.

Experimental analysis of air-conditioning in hospital rooms by means of light radiant ceilings

The new wards of the S. Bortolo Hospital in Vicenza (Italy) are air-conditioned by a mixed systems of radiant panels and primary air.

The effectiveness of a ground-coupled heating and cooling system

A municipality water reticulation R22 ground-coupled reversible heat pump, was investigated as an alternative to conventional air source systems. The investigation was conducted by developing analytical models that were used for the design of a ground-coupled reversible heat pump and a conventional, also reversible air-to-air system. The models were verified with a commercially available computer program as well as with measurements on the two systems.

Sizing of Room Air-Conditioners for Minimum Energy Consumption and Peak Power

Important oversizing factors are observed for room air-conditioners leading to important energy wastes and costly summer peak demands for utilities. This article intends to show that sizing decisions should be based on dynamic simulation results and include an assessment of the air conditioner part-load performance. The sizing methodology established is applied to evaluate different oversizing levels for different types of buildings, climates and systems. This enables to compare our methodology to typical rules of the thumbs applied in France.

Outdoor air: calculation and delivery.

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