High efficiency evaporators and driers
Many industries utilise evaporators and driers to concentrate or increase the percentage-solids of a product, and in a large number of applications these processes are essential for product quality.
Single effect evaporators or traditional driers utilise heat to evaporate the liquid from the product and loose the latent heat from evaporation into the exhaust system. These systems use large quantities of energy, however have low capital costs.

When using multi-effect machines, each effect uses latent energy removed from the previous stage to drive the next stage. This reduces the energy input cost relative to a single effect machine, but at the expense of additional capital equipment cost. Integrating Nthalpy’s direct or indirect heat pumps into a single-effect evaporator or drier can significantly improve the operating costs to below that of a 5 stage multi-effect machine, without significantly increasing the capital costs of the single effect plant.

Nthalpy’s solutions are designed to be retrofitted to most existing single effect evaporators, or alternatively its heat pumps can work with existing OEM’s plant to ensure new machines are optimised for energy efficiency. Typical energy cost savings are between 40% and 80% dependant on operating temperatures and flow, and capital costs are about 33% of a 5-effect machine.

Typical paybacks are between 1 and 3 years on energy, and the capital cost avoided through adopting a single-effect evaporator in conjunction with an Nthalpy heat pump, instead of a multi-effect evaporator, can equate to several hundred thousand pounds.