A New Control Approach for a Direct Expansion (DX) Air Conditioning (A/C)System with Variable Speed Compressor and Variable Speed Supply Fan
نویسندگان
چکیده
منابع مشابه
A PD Law Based Fuzzy Logic Control Strategy For Simultaneous Control Of Indoor Temperature And Humidity Using A Variable Speed Direct Expansion Air Conditioner
In small to medium scale buildings located in the subtropics, such as Hong Kong, direct expansion air conditioning (DX A/C) systems are widely applied. This is because, as compared to chilled water based central air conditioning systems, DX A/C systems are compact, flexible for multi-room services, energy efficient and cost less to maintain and operate. However, traditionally, a DX A/C system i...
متن کاملA Modeling Study on the Operational Stability of a Variable Speed Direct Expansion Air Conditioning System
This paper reports on a modeling study on the operational stability of an electronic expansion valve (EEV) controlled variable speed (VS) direct expansion (DX) air conditioning (A/C) system. An existing detailed, physical based dynamic model for a VS DX A/C system was further developed by adding equations for EEV’s temperature sensor. Using this further developed model, a modeling study on the ...
متن کاملA Heuristic Supply Air Temperature Reset Strategy for VAV Systems Employing Variable-Capacity DX Cooling Equipment
This paper presents a generalized control heuristic to reset supply air temperature setpoints for DX units with capacity modulation and variable air flow. The heuristic is shown to work well for different DX systems with different compressor types and fan-duct combinations. Digital scroll and variable-speed compressors were considered and modeled using curve fits to manufacturer’s data. Evapora...
متن کاملEffect of Condenser Air Flow on the Performance of Split Air Conditioner
Split air conditioning units are usually used for small and medium scale residential buildings. Therefore, more energy efficiency and lower cost are needed along with reliable control for the air conditioning units. An experimental investigation has been carried out to study the performance of a direct expansion air conditioning (A/C) unit having a variable speed condenser fan. The modulation o...
متن کاملOptimal Control of a Variable-Speed Wind Energy Conversion System: A New Approach
The operation of wind energy conversion systems mainly deals with variable and unpredictable wind regimes resulting in variable power efficiency. In addition, nowadays with the presence of high penetration level of wind farms integrated to power systems, stability and power quality problems might be addressed, when a disturbance event occurs. These challenges are worsened with significant degre...
متن کامل