project:converting_freezer_to_heat_pump [Labka Hackerspace Ostrava]

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====== Converting freezer to heatpump. ======

|go-to person:|Razzy|
|interested:|feel free to add yourself|
|Why?:|waste to resource, money efficient|
|subgoals:|low cost, energy efficient heating to passive workshop/wood cabin|
|missing:|freezer, wood cabin, 10 man-hours|

info:

**Old freezer:**

input 100W

freeze 14l of water in 24 hours

heating transport: (((333kJ/kg * 14kg) / 24h) /3600s)=54W

heating efficiency: ((100+54)/100) * 100=**154%**

[[https://en.wikipedia.org/wiki/Enthalpy_of_fusion|https://en.wikipedia.org/wiki/Enthalpy_of_fusion]]

[[http://www.lenntech.com/calculators/energy/energy-cost-water.htm|http://www.lenntech.com/calculators/energy/energy-cost-water.htm]]

**New freezer**

input 23W

freeze: 38l of water in 24h

heating transport: (((333kJ/kg * 38kg) / 24h) /3600s)=146W

heating efficiency: ((146+23)/23) * 100=**7347%**

[[http://mraznicky.heureka.cz/liebherr-gtp-4656/specifikace/#section|http://mraznicky.heureka.cz/liebherr-gtp-4656/specifikace/#section]]

**Commercial product (heat-pump):**

input:3,1kW

output:15kW

heating efficiency: ((15)/3,1) * 100=**483%**

[[http://eshop.macekasyn.cz/Hidden-karty-z-Abry/Tepelne-cerpadlo-RAPID-Maxi-RX60LsC-do-51-m3-s-chlazenim.html|http://eshop.macekasyn.cz/Hidden-karty-z-Abry/Tepelne-cerpadlo-RAPID-Maxi-RX60LsC-do-51-m3-s-chlazenim.html]]

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