Solar + heat pump dryer system
Integrated commercial heat pump dryer
Solar energy is popular now on the world as free power and many customers use solar power to dry goods on different market. Solar dryer should be good to use on place without electricity and use 100% power from sunshine without additional dry cost. But for some commercial dry projects and some goods need resistant dry as solar can not keep working. And some customers also use backup oil& gas or electricity directly as backup power with same problem for pollution or high dry cost.
Then we now design and combine solar+ heat pump dry to have the best result to use solar for 10-20% free and 80% more or less with heat pump to save more dry cost.
1. Domestic solar heat pump dryer machine:
For 3HP heat pump dryer, we use 2pcs x 2m2 solar air collector on back to use solar power on daytime. It can supply about 15KWH free power during all days as standard sunshine ( 0.8kwh/m2 x 70% x 7 hours x 4 (m2)=15kwh more or less )
As heat air through solar air collector directly with dryroom and heat pump dry will work as backup power to work if no enough power or on weak sunshine or on night.
2. Commercial Solar+ heat pump dryer machine.
Solar+ heat pump dryer use more for commercial dry project photos for reference: Some points need to care about before do solar + heat pump dryer projects:
>>> Need to check the space to install solar air collectors. If have space as outer with sunshine ( no shadow), then we can check to install solar air collectors. How many space decide how many solar air collectors can install. Commonly solar air collectors install on the roof of dryroom to connect with dryroom together.
>>> Solar air collectors as solar power is only pending to save dry cost. When you calculate heat pump dry capacity, need to assure 100% power to dry all goods. Because if raining day without no solar, or weak sunshine, etc, then heat pump need to supply 100% power for dry projects. If no enough, then dry process should stop and influence quality of drying goods. Solar power only can save 20% or more on strong sunshine, less on weak sunshine or no on raining days.
Why use solar + heat pump dryer.
Even solar is not stable, but solar power is 100% free and no pollution. If calculate with one year, we can calculate as average 280 days with 7 hours strong sunshine, and 80 days with weak or raining days, we still can have 280 x 2 (m2 solar air collector ) x 0.8 kwh/hour x 7 hours x 70% =2195kwh one year for 1pc solar air collector.