Water Heat Exchanger Efficiency

The concept of heat exchanger efficiency provides a new way for the design and analysis of heat exchangers and heat exchanger networks.

Water heat exchanger efficiency. Disadvantages of plate and fin heat exchangers. Larger heat transfer area. Condensing boilers reclaim that latent heat by condensing the water vapor and transferring its heat back into the return water which increases boiler efficiency from 80 for conventional boilers which may be considered exceptional for a conventional non condensing boiler to on average 95 see fig. High heat transfer efficiency especially in gas treatment.

An inefficient heat exchanger might be cheaper at purchasing but will consume much more energy in running and cost you double or three times more money in energy consumption in running which must be much more than you saved at heat exchanger purchasing. Large contact surface area specially corrugated plates provide larger heat transfer surface then flat plate and shell tube heat exchangers. Difficult to clean the pathways. Exchanger transferring heat from a liquid e g.

The outlet temperature of the water is 36 c. A storage calorifier as shown in figure 2 13 1 is constructed differently it usually consists of a hot water storage vessel with a primary heating coil inside. A heat exchanger with higher efficiency may cost you more money at purchasing but will definitely save money in running and payback in not long run. But of course they can be much lower too.

A shell and tube heat exchanger used to heat water for space heating using either steam or water is often referred to as a non storage calorifier. Compact size bphe s are the most compact type of water to water heat exchangers on the market today. The specific heat of the oil is 2 2 kj kg k. The rate of flow of oil is 1 kg s.

Approximately 5 times lighter in weight than that of shell and tube heat exchanger. Able to withstand high pressure. High efficiency plates stacked on top of each other provide virtually no room for heat loss. Might cause clogging as the pathways are very narrow.

This article looks at liquid to liquid heat exchangers. Water often show effectiveness factors around 0 95. Water to a liquid e g. Heat exchangers transfer or exchange heat between two or more liquids or gases of different temperatures the heat transferring process can be gas to gas liquid to gas or liquid to liquid and usually does not involve the two fluids or gases having to mix or come in direct contact.

Specifically water to water heat exc.