Abstract:
The present invention provides a fault detection system and method for a refrigeration system and a refrigeration system. The fault detection method includes: acquiring an output current or output power of a power source (S13) and calculating a theoretical output current or output power of the power source (S14), and comparing the output current or output power of the power source with the theoretical output current or output power of the power source to determine whether an anomaly exists in the system (S15); and changing a working state of at least one device when an anomaly exists in the system, and comparing the output currents or output powers of the power source before and after the working state of the at least one device is changed, so as to determine whether an anomaly exists in the at least one device.
Abstract:
A refrigeration system (12) includes a free cooling system (52) having an air-cooled heat exchanger (56), where the air-cooled heat exchanger includes a fan (60) configured to move air (59) over coils of the air-cooled heat exchanger to remove heat from a coolant (58) flowing through the air-cooled heat exchanger, and a mechanical cooling system (68) with a refrigerant loop that includes an evaporator (66), a compressor (70), and a condenser (72) disposed along the refrigerant loop, where the compressor is configured to circulate a refrigerant through the refrigerant loop, and wherein the evaporator (66) is configured to receive the coolant and transfer heat from the coolant to the refrigerant. The refrigeration system (12) also includes a controller (78) configured to adjust a fan speed of the fan (60) up to a threshold fan speed, to initiate operation of the compressor (70) when the fan speed reaches the threshold fan speed, wherein the fan speed and a compressor speed of the compressor are based at least on an ambient air temperature (89) and a cooling load demand.
Abstract:
Un système de chauffage et de rafraichissement par énergie solaire comporte un chauffe-eau solaire (12), comprenant un capteur solaire (16) et un ballon de stockage (20), et une machine à absorption (14), comprenant un évaporateur (34, un absorbeur (42), un désorbeur (50) et un condenseur (54). Le désorbeur (50) comprend un échangeur (58) en communication avec l'absorbeur (42), et logé dans le ballon de stockage (20) et un séparateur liquide/vapeur (60) en communication avec l'échangeur (58), l'absorbeur (42) et le condenseur (54).
Abstract:
The invention relates to a plant for producing sanitary hot water, that comprises a water heater including a tank (1) containing a fluid to be heated, and a controlled mechanical ventilation system (2) for extracting air from a dwelling, the controlled mechanical ventilation system (2) being coupled to a thermodynamic circuit (3) in which flows a coolant fluid, the thermodynamic circuit (3) including an evaporator (4) for exchanging heat with the extracted air, a compressor (6), an expander (8) and a condenser (7) for exchanging heat with the fluid contained in the tank (1). The ventilation system is equipped with a means for adjusting the flow of extracted air, e.g. based on hygrometry. The compressor (6) is a variable speed compressor capable of modifying the flow of the coolant fluid.