Abstract
The majority of integrated energy systems (IES) for combined electricity, heat and refrigeration generation, or trigeneration, are based on gas engines. The fuel efficiency of gas engines are strictly influenced by intake air temperatures. Practically in all IES the absorption lithium-bromide chillers (ACh) are applied for conversing the heat removed from the engine into refrigeration in the form of chilled water. The peculiarity of trigeneration in food industries is the use of chilled water of about 12°C for technological needs instead of 7°C as typical for ACh. This leads to a considerable great potential of engine intake air deeper cooling not realized by ACh, that can be used by ejector chiller (ECh) as the low temperature stage of two-stage absorption-ejector chiller (AECh) to provide engine cyclic air deep cooling and enhancing engine fuel efficiency. To evaluate the effect of gas engine cyclic air cooling the data on fuel consumption and power output of gas engine JMS 420 GS-N.L were analyzed.
Highlights
The gas engines (GE) [1, 2] found a widespread application in integrated energy systems (IES), trigeneration or systems for combined cooling, heat and power generation (CCHP) [3, 4]
A refrigeration capacity, generated by absorption lithiumbromide chiller (ACh), that recovers the heat released from the engine, can be used for engine intake air cooling (EIAC) as in-cycle trigeneration [5, 6]
The peculiarity of trigeneration in food industries is the use of chilled water of about 12°C for technological needs instead of 7°C as typical for absorption lithium-bromide chillers (ACh)
Summary
The gas engines (GE) [1, 2] found a widespread application in integrated energy systems (IES), trigeneration or systems for combined cooling, heat and power (electricity) generation (CCHP) [3, 4]. A refrigeration capacity, generated by absorption lithiumbromide chiller (ACh), that recovers the heat released from the engine, can be used (in addition to technological or other needs) for engine intake air cooling (EIAC) as in-cycle trigeneration [5, 6]. This provides improvement of engine fuel efficiency, and prolong the time of efficient operation of trigeneration plant [7, 8], since cooling demands for technological needs have, as a rule, periodic character. This leads to a considerable great potential of engine intake air deeper cooling not realized by ACh, that can be used by ejector chiller (ECh) as the low temperature stage of two-stage absorption-ejector chiller (AECh) to provide engine cyclic air deep cooling and enhancing engine fuel efficiency [9, 10]
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