DAFTAR PUSTAKA
1. Ambarita, Himsar. 2012. Teknik Pendingin dan Pengkondisian Udara. Buku Kuliah. Medan : USU
2. Arikundo, F.R. 2013. Rancang Bangun Prototype Kolektor Surya Tipe Plat Datar Untuk Penghasil Panas pada Pengering Produk Pertanian dan Perkebunan. Skripsi. Medan: USU
3. Ashrae. 1998. Ashrae Handbook 1997. Fundamental. GA. Atlanta.
4. Cengel, Y.A. dan Boles, M.A. 2006. Thermodynamics: An Engineering Approach. 4th Edition. McGraw-Hill. New York
5. Cocoa Sustainability Partnership. 2011. Cokelat: Bangkitnya Para Penghasil Kakao Indonesia. Graha Pena Lt.8. Suite 804-805. Makassar
6. Daghigh, Ronak. Rusla, Mohd Hafidz. Dkk. 2010. Review of Solar Assisted Heat Pump Drying Systems for Agricultural and Marine Products. Renewable and Sustainable Energy Reviews. Selangor. Universiti Kebangsaan Malaysia (UKM). Malaysia. 7. Departemen Perindustrian Indonesia. 2007. Gambaran Sekilas Industri Kakao. Jakarta. 8. Fadhel, M.I dkk. 2010. Performance Analysis of Solar-Assisted Chemical Heat-Pump
Dryer. Solar Energy 84 (2010) 1920-1928. Malaysia.
9. Hawlader, M.N.A dkk. 2005. Solar Heat Pump Drying and Water Heating in The Tropics. Solar Energy 80 (2006) 492-499. Singapore.
10.Hawlader, M.N.A dkk. 2003. Solar Assisted Heat Pump Dryer and Water Heater. Applied Energy 74 (2003) 185-193. Singapore.
11.Hermawan, Indra. 2013. Kajian Pengering Pakaian Sistem Pompa Kalor. Tesis. Medan : USU
12.http://id.m.wikipedia.org/Biji-kakao
13.Kuang, Y.H dkk. 2002. Experimental Study on Solar Assisted Heat Pump System for Heat Supply. Energy Conversion and Management 44(2003) 1089-1098. China
14.LI, Haifeng dkk. 2010. A Solar Assisted Heat Pump Drying System for Grain in- Store Drying. Front Energy Power Eng. China
15.Moran, M.J. dan Shapiro, H.N. 2006. Fundamental of Engineering Thermodynamics. 5th Edition, John Wiley & Sons Inc.
16.Wang, S.K. 2000. Handbook of Air Conditioning and Refrigeration. 2nd Edition. McGraw-Hill.
