Typical COP for Different Chiller Types Type of chillersRange for COP Small electric chillers Air cooled 2.2–3.2 Large electric chillers Air cooled 3.7–4.1 Water cooled 4.6–5.3 Absorption chillers Single-effect 0.4–0.6 Double-effect 0.8–1.1 Engine-driven chillers 1.2–2.0 COP, Coefficient of ...
The water recovery system consists of a device for cooling the exhaust so as to condense out the water, such as a counter-current flow heat exchanger in combination with a chiller (a refrigerant-cooled heat exchanger), which cools the exhaust below its dew point. Exhaust condensate is ...
absorption chiller; ammonia–water; air cooled; residential cooling 1. Introduction In tropical country such as Indonesia, climate conditions are almost constant throughout the year and dominated by high temperatures and humidity [1]. As a result, Indonesia has a significant demand for cooling [2]...
At the same time, the permeate stream was maintained at the desired temperature using a 15 kW water chiller present in the RMIT thermal-fluids lab. The hot feed water and the cold permeate were pumped and circulated tangentially to the membrane using two identical submersible pumps (5–12 V ...
The application of starch films, such as food packaging materials, has been restricted due to poor mechanical and barrier properties. However, the addition of a reinforcing agent, cellulose nanofibers (CNF) and also thymol, into the films, may improve the properties of films. This work investigat...
In this respect, in a recent work by the authors [63], it was calculated that to meet this constraint for an air-cooled chiller with a cooling capacity comparable to the one of the HP here considered, Cs should be increased from 600 up to 1500 kJ/°C. For this reason, 1500 kJ/°...
The chiller pump circulates the cold water through the sand pores in a closed loop circulation as shown in Figure 1. PT100 temperature sensor is inserted inside sand to controlling the temperature feedback to the chiller cooling circuit. After the temperature reaches the setting temperature, the ...
Figure 2. Schematic diagram of the test plate heat exchanger. Table 1. Geometrical parameters of test plate heat exchanger. The performance of the test PHE was measured under the steady-flow condition for 15 min, and the properties of LiBr for measuring the performance of the test PHE wer...
The refrigerant consists of four main components: a water-evaporator, compressor, air-cooled condenser, and expansion valve. This refrigeration system is widely used as air conditioning for residential applications and hotel rooms. Figure 5. Schematic representation of the VCCW And refrigerant cycle 1...
Per Ma and Wang, chiller performance degradation can be detected significantly by using a hybrid quick search (HQS) method through characterizing the PIs of multiple operational parameters, such as the temperature of the condenser water supply [76]. A high chiller's load affects the performance ...