Stirling engine micro-CHP This technology is new to the market, although the principal of the Stirling engine is well established. The electrical output is small relative to the heat output (about 6:1) but this is not necessarily a problem for micro-CHP.
Kidney pain is caused by infection, inflammation, injury or enlargement of the kidney, or by conditions that block the flow of urine out of the kidney. Pyelonephritis (kidney infection) and kidney stones are the most common causes of kidney pain. Pyelonephritis is often accompanied by other symptoms of urinary tract infection, such as burning with urination, frequent or urgent need to urinate, bloody urine, fever, and nausea with or without vomiting.
Your Kidneys and Flank Area. Your kidneys are located below your ribs, which is why a problem with these organs can often be felt in your upper back or flank, or side area. RELATED: Kidney Disorders. Kidney and Flank Pain Causes. Kidney or flank pain typically feels like a dull ache on one side of your upper back. It can be caused by a number of different infections or injuries. The most common causes of flank or kidney pain are: 1  Kidney stones.  Pyelonephritis â kidney infection.