Heat pump dryer calculator
What are you drying?
Pick your product from 138 we have listed — fruit, vegetables, spices, herbs, fish, grain, food products and more — or enter your own. You get the water to take out, the Sunniva dryer module that covers it, and what each batch costs against electric heaters, LPG, diesel or wood. Every figure updates as you type, and the method is at the bottom.
Your product
Search, or browse by group. Choosing one fills in typical figures — every one stays editable.
Your batch
Moisture is wet basis — the share of the fresh weight that is water.
Fresh (wet) weight per batch
500kg
Moisture going in
82%
Moisture coming out
12%
Moisture out must be below moisture in.
Drying time you can allow
14h
Longer cycles need a smaller module. Very fast cycles can damage some products.
Drying air temperature
60°C
70 °C is the modules’ rated drying temperature. Lower suits heat-sensitive products but dries more slowly.
Tray loading
8kg/m²
Fresh product per square metre of tray. Sets the tray area the chamber needs.
What you dry with today
The saving is worked out against this.
Batches per year
200batches
What you pay for energy
Change these to your own prices — the comparison is only as good as the numbers you put in.
Electricity
9₹/kWh
LPG (commercial)
95₹/kg
Diesel
92₹/litre
Wood / biomass
8₹/kg
Engineering assumptions change only if you know why
Batch utilisation
65%
Average share of the module’s rated moisture removal achieved over a whole batch. Drying slows as the product dries, so a batch never averages the rated figure.
Conventional dryer heat demand
1.8kWh/kg water
Heat a vented hot-air tray dryer burns per kg of water removed — 1.2 to 3.0 is the usual range (4–11 MJ/kg).
LPG burner efficiency
85%
Diesel burner efficiency
80%
Wood / biomass furnace efficiency
50%
Dryer and chamber, installed — ours or anyone else’s. Nothing is sent anywhere until you fill in the form below.
Grid electricity carbon
0.71kg CO₂/kWh
The Indian grid average. Lower it if you have rooftop solar or a green tariff.
LPG carbon
2.98kg CO₂/kg
Diesel carbon
2.68kg CO₂/litre
Wood / biomass carbon
0kg CO₂/kg
Usually counted as biogenic, i.e. zero. Raise it if your wood is not sustainably sourced.
Water to take out, per batch
—
Smallest dryer module that covers it
—
- Dried product out
- —
- Average moisture removal needed
- —
- Rated capacity to cover it
- —
- Tray area in the chamber
- —
- Electricity per batch
- —
- Running cost per kg of dried product
- —
What happens to every 100 kg loaded
Energy cost per batch
You would save
—
What it pays back, and what it stops
Pays for itself in
—
Carbon avoided
—
Want this checked by an engineer?
Your name, phone and email go on the saved sheet and let our team confirm the module and design the chamber around your product. Drying behaviour varies with variety, cut and season, so we often suggest a trial batch. All three are needed before the sheet can be sent or saved.
How this is worked out
- Water to take out = fresh weight × (moisture in − moisture out) ÷ (100 − moisture out), all wet basis. Drying 100 kg at 80 % down to 10 % takes out 77.8 kg — not 70.
- Rated capacity needed = water ÷ drying time ÷ batch utilisation. The modules’ dehumidifying capacity is a rated figure; over a real batch the product gives up water more and more slowly, so the average is lower. The default 65 % is a typical allowance and is a slider.
- Electricity = water ÷ (the module’s rated kg of water per kWh × batch utilisation). Rated figures are from Sunniva’s specification table: 2.18–2.75 kg per kWh.
- Conventional dryers burn about 1.2–3.0 kWh of heat per kg of water, because they heat outside air once and vent it. Fuel = that heat ÷ burner efficiency ÷ calorific value: LPG 12.8 kWh/kg, diesel 10 kWh/litre, wood 4.2 kWh/kg; electric heaters 100 %.
- Product figures are typical starting values for tray drying, not measurements of your product. Variety, ripeness, cut and season all move them — which is why every one is a slider, and why we suggest a trial batch before a large order.
- Drying temperature is recorded for the chamber setting. Below 70 °C the module removes water more slowly than its rating; the batch utilisation allowance covers the usual case, and we confirm it on your product.
- Payback is simple payback — the price you type in, divided by the annual saving. No price of ours is assumed or shown. Carbon is the displaced fuel’s emissions minus the electricity the dryer draws, at the grid figure in the assumptions.
- Indicative only. Chamber construction, air path, loading and local conditions all affect the result — confirm with Sunniva Encon LLP before ordering.
Heat pump dryer sizingSunniva Encon LLP
Calculated for
—
What you entered
Result
Water per batch
—
—
Energy cost per batch & savings
How this was worked out
Talk to Sunniva
SalesWhatsApp our sales desk
LinkedInFollow Sunniva Encon
YouTubeSee the machines running
Review usRate us on GoogleContact
+91 93213 65103sales@sunnivaencon.com
www.sunnivaencon.com/heat-pump-dryer
Office
C‑443, Oshiwara Industrial Centre Premises CHS, New Link Road, Goregaon West, Mumbai© 2026 Sunniva Encon LLP. The design and code of this calculator are our copyright. Results are indicative and offered in good faith — the method is set out above. Confirm the final selection with us before ordering.
Heat pump dryer calculator
What are you drying?
Pick your product from 138 we have listed — fruit, vegetables, spices, herbs, fish, grain, food products and more — or enter your own. You get the water to take out, the Sunniva dryer module that covers it, and what each batch costs against electric heaters, LPG, diesel or wood. Every figure updates as you type, and the method is at the bottom.
Your product
Search, or browse by group. Choosing one fills in typical figures — every one stays editable.
Your batch
Moisture is wet basis — the share of the fresh weight that is water.
Fresh (wet) weight per batch
500kg
Moisture going in
82%
Moisture coming out
12%
Moisture out must be below moisture in.
Drying time you can allow
14h
Longer cycles need a smaller module. Very fast cycles can damage some products.
Drying air temperature
60°C
70 °C is the modules’ rated drying temperature. Lower suits heat-sensitive products but dries more slowly.
Tray loading
8kg/m²
Fresh product per square metre of tray. Sets the tray area the chamber needs.
What you dry with today
The saving is worked out against this.
Batches per year
200batches
What you pay for energy
Change these to your own prices — the comparison is only as good as the numbers you put in.
Electricity
9₹/kWh
LPG (commercial)
95₹/kg
Diesel
92₹/litre
Wood / biomass
8₹/kg
Engineering assumptions change only if you know why
Batch utilisation
65%
Average share of the module’s rated moisture removal achieved over a whole batch. Drying slows as the product dries, so a batch never averages the rated figure.
Conventional dryer heat demand
1.8kWh/kg water
Heat a vented hot-air tray dryer burns per kg of water removed — 1.2 to 3.0 is the usual range (4–11 MJ/kg).
LPG burner efficiency
85%
Diesel burner efficiency
80%
Wood / biomass furnace efficiency
50%
Dryer and chamber, installed — ours or anyone else’s. Nothing is sent anywhere until you fill in the form below.
Grid electricity carbon
0.71kg CO₂/kWh
The Indian grid average. Lower it if you have rooftop solar or a green tariff.
LPG carbon
2.98kg CO₂/kg
Diesel carbon
2.68kg CO₂/litre
Wood / biomass carbon
0kg CO₂/kg
Usually counted as biogenic, i.e. zero. Raise it if your wood is not sustainably sourced.
Water to take out, per batch
—
Smallest dryer module that covers it
—
- Dried product out
- —
- Average moisture removal needed
- —
- Rated capacity to cover it
- —
- Tray area in the chamber
- —
- Electricity per batch
- —
- Running cost per kg of dried product
- —
What happens to every 100 kg loaded
Energy cost per batch
You would save
—
What it pays back, and what it stops
Pays for itself in
—
Carbon avoided
—
Want this checked by an engineer?
Your name, phone and email go on the saved sheet and let our team confirm the module and design the chamber around your product. Drying behaviour varies with variety, cut and season, so we often suggest a trial batch. All three are needed before the sheet can be sent or saved.
How this is worked out
- Water to take out = fresh weight × (moisture in − moisture out) ÷ (100 − moisture out), all wet basis. Drying 100 kg at 80 % down to 10 % takes out 77.8 kg — not 70.
- Rated capacity needed = water ÷ drying time ÷ batch utilisation. The modules’ dehumidifying capacity is a rated figure; over a real batch the product gives up water more and more slowly, so the average is lower. The default 65 % is a typical allowance and is a slider.
- Electricity = water ÷ (the module’s rated kg of water per kWh × batch utilisation). Rated figures are from Sunniva’s specification table: 2.18–2.75 kg per kWh.
- Conventional dryers burn about 1.2–3.0 kWh of heat per kg of water, because they heat outside air once and vent it. Fuel = that heat ÷ burner efficiency ÷ calorific value: LPG 12.8 kWh/kg, diesel 10 kWh/litre, wood 4.2 kWh/kg; electric heaters 100 %.
- Product figures are typical starting values for tray drying, not measurements of your product. Variety, ripeness, cut and season all move them — which is why every one is a slider, and why we suggest a trial batch before a large order.
- Drying temperature is recorded for the chamber setting. Below 70 °C the module removes water more slowly than its rating; the batch utilisation allowance covers the usual case, and we confirm it on your product.
- Payback is simple payback — the price you type in, divided by the annual saving. No price of ours is assumed or shown. Carbon is the displaced fuel’s emissions minus the electricity the dryer draws, at the grid figure in the assumptions.
- Indicative only. Chamber construction, air path, loading and local conditions all affect the result — confirm with Sunniva Encon LLP before ordering.
Heat pump dryer sizingSunniva Encon LLP
Calculated for
—
What you entered
Result
Water per batch
—
—
Energy cost per batch & savings
How this was worked out
Talk to Sunniva
SalesWhatsApp our sales deskLinkedInFollow Sunniva EnconYouTubeSee the machines runningReview usRate us on GoogleContact
+91 93213 65103sales@sunnivaencon.com
www.sunnivaencon.com/heat-pump-dryer
Office
C‑443, Oshiwara Industrial Centre Premises CHS, New Link Road, Goregaon West, Mumbai© 2026 Sunniva Encon LLP. The design and code of this calculator are our copyright. Results are indicative and offered in good faith — the method is set out above. Confirm the final selection with us before ordering.