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.
Kidney pain â also called renal pain â refers to pain arising from infection, injury or inflammation of a kidney. You may feel kidney pain as a dull, one-sided ache in your upper back, often accompanied by fever and urinary symptoms. Some people are surprised to learn exactly where the kidneys are located.Your kidneys are located relatively high in your body, under your lower ribs. It's not unusual to attribute back pain or side (flank) pain to your kidneys. But more often than not, your kidneys probably aren't the cause of your back or flank pain.1  Causes.ome people are surprised to learn exactly where the kidneys are located. Your kidneys are located relatively high in your body, under your lower ribs. It's not unusual to attribute back pain or side (flank) pain to your kidneys. But more often than not, your kidneys probably aren't the cause of your back or flank pain.